diff --git a/apps/admin_audit/lib/IAuditLogger.php b/apps/admin_audit/lib/IAuditLogger.php
index f17afa6852e..635c063753f 100644
--- a/apps/admin_audit/lib/IAuditLogger.php
+++ b/apps/admin_audit/lib/IAuditLogger.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2022 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/apps/comments/appinfo/routes.php b/apps/comments/appinfo/routes.php
index 903f1b2168c..3c44eacda94 100644
--- a/apps/comments/appinfo/routes.php
+++ b/apps/comments/appinfo/routes.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2017-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/apps/comments/lib/Activity/Filter.php b/apps/comments/lib/Activity/Filter.php
index 8dcafd872d7..58777c3b03c 100644
--- a/apps/comments/lib/Activity/Filter.php
+++ b/apps/comments/lib/Activity/Filter.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/apps/comments/lib/Activity/Setting.php b/apps/comments/lib/Activity/Setting.php
index 2f332d99b43..2a44c0889f5 100644
--- a/apps/comments/lib/Activity/Setting.php
+++ b/apps/comments/lib/Activity/Setting.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/apps/comments/lib/AppInfo/Application.php b/apps/comments/lib/AppInfo/Application.php
index db4a2ce614c..9d1132f5ce5 100644
--- a/apps/comments/lib/AppInfo/Application.php
+++ b/apps/comments/lib/AppInfo/Application.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/apps/dav/appinfo/routes.php b/apps/dav/appinfo/routes.php
index dba7bcbbdf0..705ccf18943 100644
--- a/apps/dav/appinfo/routes.php
+++ b/apps/dav/appinfo/routes.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2017 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/apps/dav/lib/CalDAV/Activity/Filter/Calendar.php b/apps/dav/lib/CalDAV/Activity/Filter/Calendar.php
index 78579ee84b7..064cbbf39c1 100644
--- a/apps/dav/lib/CalDAV/Activity/Filter/Calendar.php
+++ b/apps/dav/lib/CalDAV/Activity/Filter/Calendar.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/apps/dav/lib/CalDAV/Activity/Filter/Todo.php b/apps/dav/lib/CalDAV/Activity/Filter/Todo.php
index b001f90c28d..3c2dd935203 100644
--- a/apps/dav/lib/CalDAV/Activity/Filter/Todo.php
+++ b/apps/dav/lib/CalDAV/Activity/Filter/Todo.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/apps/dav/lib/CalDAV/Activity/Setting/Calendar.php b/apps/dav/lib/CalDAV/Activity/Setting/Calendar.php
index 0ad86a919bc..8e777048027 100644
--- a/apps/dav/lib/CalDAV/Activity/Setting/Calendar.php
+++ b/apps/dav/lib/CalDAV/Activity/Setting/Calendar.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/apps/dav/lib/CalDAV/Activity/Setting/Event.php b/apps/dav/lib/CalDAV/Activity/Setting/Event.php
index ea9476d6f08..c10d37d8902 100644
--- a/apps/dav/lib/CalDAV/Activity/Setting/Event.php
+++ b/apps/dav/lib/CalDAV/Activity/Setting/Event.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/apps/dav/lib/CalDAV/Activity/Setting/Todo.php b/apps/dav/lib/CalDAV/Activity/Setting/Todo.php
index ed8377b0ffa..39bcd440112 100644
--- a/apps/dav/lib/CalDAV/Activity/Setting/Todo.php
+++ b/apps/dav/lib/CalDAV/Activity/Setting/Todo.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/apps/dav/lib/CalDAV/Integration/ExternalCalendar.php b/apps/dav/lib/CalDAV/Integration/ExternalCalendar.php
index acf81638679..edacdd42ea7 100644
--- a/apps/dav/lib/CalDAV/Integration/ExternalCalendar.php
+++ b/apps/dav/lib/CalDAV/Integration/ExternalCalendar.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2020 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/apps/dav/lib/CalDAV/Integration/ICalendarProvider.php b/apps/dav/lib/CalDAV/Integration/ICalendarProvider.php
index 40a8860dcb4..d913b91f1f0 100644
--- a/apps/dav/lib/CalDAV/Integration/ICalendarProvider.php
+++ b/apps/dav/lib/CalDAV/Integration/ICalendarProvider.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2020 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/apps/dav/lib/CalDAV/Outbox.php b/apps/dav/lib/CalDAV/Outbox.php
index 608114d8093..a2339790bed 100644
--- a/apps/dav/lib/CalDAV/Outbox.php
+++ b/apps/dav/lib/CalDAV/Outbox.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2018 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/apps/dav/lib/CalDAV/Principal/User.php b/apps/dav/lib/CalDAV/Principal/User.php
index 047d83827ed..c7b84e6ce4c 100644
--- a/apps/dav/lib/CalDAV/Principal/User.php
+++ b/apps/dav/lib/CalDAV/Principal/User.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2017 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/apps/dav/lib/CalDAV/PublicCalendarObject.php b/apps/dav/lib/CalDAV/PublicCalendarObject.php
index 2ab40b94347..a05b09b0deb 100644
--- a/apps/dav/lib/CalDAV/PublicCalendarObject.php
+++ b/apps/dav/lib/CalDAV/PublicCalendarObject.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2017 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/apps/dav/lib/CalDAV/ResourceBooking/ResourcePrincipalBackend.php b/apps/dav/lib/CalDAV/ResourceBooking/ResourcePrincipalBackend.php
index c70d93daf52..adeb8939c88 100644
--- a/apps/dav/lib/CalDAV/ResourceBooking/ResourcePrincipalBackend.php
+++ b/apps/dav/lib/CalDAV/ResourceBooking/ResourcePrincipalBackend.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2018 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/apps/dav/lib/CalDAV/ResourceBooking/RoomPrincipalBackend.php b/apps/dav/lib/CalDAV/ResourceBooking/RoomPrincipalBackend.php
index 5704b23ae14..1cc8770739f 100644
--- a/apps/dav/lib/CalDAV/ResourceBooking/RoomPrincipalBackend.php
+++ b/apps/dav/lib/CalDAV/ResourceBooking/RoomPrincipalBackend.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2018 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/apps/dav/lib/CalDAV/Search/Xml/Filter/CompFilter.php b/apps/dav/lib/CalDAV/Search/Xml/Filter/CompFilter.php
index 21a4fff1caf..a95470a8b47 100644
--- a/apps/dav/lib/CalDAV/Search/Xml/Filter/CompFilter.php
+++ b/apps/dav/lib/CalDAV/Search/Xml/Filter/CompFilter.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2017 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/apps/dav/lib/CalDAV/Search/Xml/Filter/LimitFilter.php b/apps/dav/lib/CalDAV/Search/Xml/Filter/LimitFilter.php
index a98b325397b..7c56a50cdd9 100644
--- a/apps/dav/lib/CalDAV/Search/Xml/Filter/LimitFilter.php
+++ b/apps/dav/lib/CalDAV/Search/Xml/Filter/LimitFilter.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2017 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/apps/dav/lib/CalDAV/Search/Xml/Filter/OffsetFilter.php b/apps/dav/lib/CalDAV/Search/Xml/Filter/OffsetFilter.php
index ef438aa0258..8e06b722c03 100644
--- a/apps/dav/lib/CalDAV/Search/Xml/Filter/OffsetFilter.php
+++ b/apps/dav/lib/CalDAV/Search/Xml/Filter/OffsetFilter.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2017 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/apps/dav/lib/CalDAV/Search/Xml/Filter/ParamFilter.php b/apps/dav/lib/CalDAV/Search/Xml/Filter/ParamFilter.php
index 0c31f32348a..057e337d0d3 100644
--- a/apps/dav/lib/CalDAV/Search/Xml/Filter/ParamFilter.php
+++ b/apps/dav/lib/CalDAV/Search/Xml/Filter/ParamFilter.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2017 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/apps/dav/lib/CalDAV/Search/Xml/Filter/PropFilter.php b/apps/dav/lib/CalDAV/Search/Xml/Filter/PropFilter.php
index 251120e35cc..3ff265e80f5 100644
--- a/apps/dav/lib/CalDAV/Search/Xml/Filter/PropFilter.php
+++ b/apps/dav/lib/CalDAV/Search/Xml/Filter/PropFilter.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2017 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/apps/dav/lib/CalDAV/Search/Xml/Filter/SearchTermFilter.php b/apps/dav/lib/CalDAV/Search/Xml/Filter/SearchTermFilter.php
index 6d6bf958496..9445158f3db 100644
--- a/apps/dav/lib/CalDAV/Search/Xml/Filter/SearchTermFilter.php
+++ b/apps/dav/lib/CalDAV/Search/Xml/Filter/SearchTermFilter.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2017 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/apps/dav/lib/Capabilities.php b/apps/dav/lib/Capabilities.php
index f9bad25bf31..2c87112673f 100644
--- a/apps/dav/lib/Capabilities.php
+++ b/apps/dav/lib/Capabilities.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016 ownCloud GmbH
  * SPDX-License-Identifier: AGPL-3.0-only
diff --git a/apps/dav/lib/CardDAV/Activity/Filter.php b/apps/dav/lib/CardDAV/Activity/Filter.php
index 8b221a29ff0..7724fb59c16 100644
--- a/apps/dav/lib/CardDAV/Activity/Filter.php
+++ b/apps/dav/lib/CardDAV/Activity/Filter.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2021 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/apps/dav/lib/Command/SendEventReminders.php b/apps/dav/lib/Command/SendEventReminders.php
index 89bb5ce8c20..6fff7d62f1f 100644
--- a/apps/dav/lib/Command/SendEventReminders.php
+++ b/apps/dav/lib/Command/SendEventReminders.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2019 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/apps/dav/lib/Command/SyncSystemAddressBook.php b/apps/dav/lib/Command/SyncSystemAddressBook.php
index 54edba01e05..b8b7f53a905 100644
--- a/apps/dav/lib/Command/SyncSystemAddressBook.php
+++ b/apps/dav/lib/Command/SyncSystemAddressBook.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/apps/dav/lib/Connector/Sabre/Exception/BadGateway.php b/apps/dav/lib/Connector/Sabre/Exception/BadGateway.php
index 1e1e4aaed04..65d8d30719b 100644
--- a/apps/dav/lib/Connector/Sabre/Exception/BadGateway.php
+++ b/apps/dav/lib/Connector/Sabre/Exception/BadGateway.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2021 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-only
diff --git a/apps/dav/lib/Connector/Sabre/Exception/EntityTooLarge.php b/apps/dav/lib/Connector/Sabre/Exception/EntityTooLarge.php
index 60b3b06ea01..eb892f91cda 100644
--- a/apps/dav/lib/Connector/Sabre/Exception/EntityTooLarge.php
+++ b/apps/dav/lib/Connector/Sabre/Exception/EntityTooLarge.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/apps/dav/lib/Connector/Sabre/Exception/UnsupportedMediaType.php b/apps/dav/lib/Connector/Sabre/Exception/UnsupportedMediaType.php
index c5fbfa3a16c..84420dd75d5 100644
--- a/apps/dav/lib/Connector/Sabre/Exception/UnsupportedMediaType.php
+++ b/apps/dav/lib/Connector/Sabre/Exception/UnsupportedMediaType.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/apps/dav/lib/Connector/Sabre/ExceptionLoggerPlugin.php b/apps/dav/lib/Connector/Sabre/ExceptionLoggerPlugin.php
index 686386dbfef..7aab4f576d7 100644
--- a/apps/dav/lib/Connector/Sabre/ExceptionLoggerPlugin.php
+++ b/apps/dav/lib/Connector/Sabre/ExceptionLoggerPlugin.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/apps/dav/lib/Connector/Sabre/MtimeSanitizer.php b/apps/dav/lib/Connector/Sabre/MtimeSanitizer.php
index 48d210ebb1b..7b26a76c2aa 100644
--- a/apps/dav/lib/Connector/Sabre/MtimeSanitizer.php
+++ b/apps/dav/lib/Connector/Sabre/MtimeSanitizer.php
@@ -1,10 +1,11 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2021 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-only
  */
-
 namespace OCA\DAV\Connector\Sabre;
 
 class MtimeSanitizer {
diff --git a/apps/dav/lib/DAV/Sharing/IShareable.php b/apps/dav/lib/DAV/Sharing/IShareable.php
index d83079f6975..019559548ad 100644
--- a/apps/dav/lib/DAV/Sharing/IShareable.php
+++ b/apps/dav/lib/DAV/Sharing/IShareable.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/apps/dav/lib/Files/Sharing/PublicLinkCheckPlugin.php b/apps/dav/lib/Files/Sharing/PublicLinkCheckPlugin.php
index 38a45b3fc37..c3b269fb9ed 100644
--- a/apps/dav/lib/Files/Sharing/PublicLinkCheckPlugin.php
+++ b/apps/dav/lib/Files/Sharing/PublicLinkCheckPlugin.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/apps/dav/lib/Migration/BuildCalendarSearchIndex.php b/apps/dav/lib/Migration/BuildCalendarSearchIndex.php
index d8f906f22ee..0ff7355b724 100644
--- a/apps/dav/lib/Migration/BuildCalendarSearchIndex.php
+++ b/apps/dav/lib/Migration/BuildCalendarSearchIndex.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2017 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/apps/dav/lib/Migration/BuildSocialSearchIndex.php b/apps/dav/lib/Migration/BuildSocialSearchIndex.php
index 26a3c21079c..e6163bd2346 100644
--- a/apps/dav/lib/Migration/BuildSocialSearchIndex.php
+++ b/apps/dav/lib/Migration/BuildSocialSearchIndex.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2017 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/apps/dav/lib/Migration/RegenerateBirthdayCalendars.php b/apps/dav/lib/Migration/RegenerateBirthdayCalendars.php
index ef8e9002e9d..ec9f3bce45d 100644
--- a/apps/dav/lib/Migration/RegenerateBirthdayCalendars.php
+++ b/apps/dav/lib/Migration/RegenerateBirthdayCalendars.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2019 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/apps/dav/lib/Migration/Version1004Date20170926103422.php b/apps/dav/lib/Migration/Version1004Date20170926103422.php
index ec56e035006..333bdd197ff 100644
--- a/apps/dav/lib/Migration/Version1004Date20170926103422.php
+++ b/apps/dav/lib/Migration/Version1004Date20170926103422.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/apps/dav/lib/Provisioning/Apple/AppleProvisioningNode.php b/apps/dav/lib/Provisioning/Apple/AppleProvisioningNode.php
index bb098a0f107..845c87cfce1 100644
--- a/apps/dav/lib/Provisioning/Apple/AppleProvisioningNode.php
+++ b/apps/dav/lib/Provisioning/Apple/AppleProvisioningNode.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2018 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/apps/dav/lib/Provisioning/Apple/AppleProvisioningPlugin.php b/apps/dav/lib/Provisioning/Apple/AppleProvisioningPlugin.php
index 31621cbc97c..28100c5c9c7 100644
--- a/apps/dav/lib/Provisioning/Apple/AppleProvisioningPlugin.php
+++ b/apps/dav/lib/Provisioning/Apple/AppleProvisioningPlugin.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2018 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/apps/dav/lib/Settings/CalDAVSettings.php b/apps/dav/lib/Settings/CalDAVSettings.php
index da48ae5db1b..bffcfef9020 100644
--- a/apps/dav/lib/Settings/CalDAVSettings.php
+++ b/apps/dav/lib/Settings/CalDAVSettings.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2017 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/apps/dav/lib/SystemTag/SystemTagObjectType.php b/apps/dav/lib/SystemTag/SystemTagObjectType.php
index 0d348cd95f4..9157da12a91 100644
--- a/apps/dav/lib/SystemTag/SystemTagObjectType.php
+++ b/apps/dav/lib/SystemTag/SystemTagObjectType.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2023 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-only
diff --git a/apps/encryption/lib/Command/DisableMasterKey.php b/apps/encryption/lib/Command/DisableMasterKey.php
index 53902e42ed1..409753f39f0 100644
--- a/apps/encryption/lib/Command/DisableMasterKey.php
+++ b/apps/encryption/lib/Command/DisableMasterKey.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2017 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/apps/encryption/lib/Command/EnableMasterKey.php b/apps/encryption/lib/Command/EnableMasterKey.php
index 96b4eb218a4..1a65530495e 100644
--- a/apps/encryption/lib/Command/EnableMasterKey.php
+++ b/apps/encryption/lib/Command/EnableMasterKey.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2019-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/apps/encryption/lib/Exceptions/MultiKeyDecryptException.php b/apps/encryption/lib/Exceptions/MultiKeyDecryptException.php
index 1246d51190b..77cef173f32 100644
--- a/apps/encryption/lib/Exceptions/MultiKeyDecryptException.php
+++ b/apps/encryption/lib/Exceptions/MultiKeyDecryptException.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2019-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/apps/encryption/lib/Exceptions/MultiKeyEncryptException.php b/apps/encryption/lib/Exceptions/MultiKeyEncryptException.php
index 60394af45c2..b3eb441d7fc 100644
--- a/apps/encryption/lib/Exceptions/MultiKeyEncryptException.php
+++ b/apps/encryption/lib/Exceptions/MultiKeyEncryptException.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2019-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/apps/encryption/lib/Exceptions/PrivateKeyMissingException.php b/apps/encryption/lib/Exceptions/PrivateKeyMissingException.php
index 15fe8f4e72f..784ba0b0885 100644
--- a/apps/encryption/lib/Exceptions/PrivateKeyMissingException.php
+++ b/apps/encryption/lib/Exceptions/PrivateKeyMissingException.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2019-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/apps/encryption/lib/Exceptions/PublicKeyMissingException.php b/apps/encryption/lib/Exceptions/PublicKeyMissingException.php
index 78eeeccf47d..41209106fa3 100644
--- a/apps/encryption/lib/Exceptions/PublicKeyMissingException.php
+++ b/apps/encryption/lib/Exceptions/PublicKeyMissingException.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2019-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/apps/encryption/lib/Settings/Admin.php b/apps/encryption/lib/Settings/Admin.php
index 1ac2ab5ff5e..6b6c54c999b 100644
--- a/apps/encryption/lib/Settings/Admin.php
+++ b/apps/encryption/lib/Settings/Admin.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/apps/federatedfilesharing/appinfo/routes.php b/apps/federatedfilesharing/appinfo/routes.php
index a7e135548c7..944509a51c4 100644
--- a/apps/federatedfilesharing/appinfo/routes.php
+++ b/apps/federatedfilesharing/appinfo/routes.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/apps/federatedfilesharing/lib/Settings/PersonalSection.php b/apps/federatedfilesharing/lib/Settings/PersonalSection.php
index eea10e39393..c56795308cb 100644
--- a/apps/federatedfilesharing/lib/Settings/PersonalSection.php
+++ b/apps/federatedfilesharing/lib/Settings/PersonalSection.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2017 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/apps/federatedfilesharing/lib/TokenHandler.php b/apps/federatedfilesharing/lib/TokenHandler.php
index 0151d12f5d9..f3fdaead8cd 100644
--- a/apps/federatedfilesharing/lib/TokenHandler.php
+++ b/apps/federatedfilesharing/lib/TokenHandler.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2019-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/apps/federation/appinfo/routes.php b/apps/federation/appinfo/routes.php
index 343870614b3..3f6c94dcb47 100644
--- a/apps/federation/appinfo/routes.php
+++ b/apps/federation/appinfo/routes.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2017-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/apps/federation/lib/Command/SyncFederationAddressBooks.php b/apps/federation/lib/Command/SyncFederationAddressBooks.php
index 36cb99473f7..0325d875969 100644
--- a/apps/federation/lib/Command/SyncFederationAddressBooks.php
+++ b/apps/federation/lib/Command/SyncFederationAddressBooks.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2017-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/apps/federation/lib/Settings/Admin.php b/apps/federation/lib/Settings/Admin.php
index 892d21a6269..202cb51a645 100644
--- a/apps/federation/lib/Settings/Admin.php
+++ b/apps/federation/lib/Settings/Admin.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*!
  * SPDX-FileCopyrightText: 2016 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/apps/federation/lib/SyncJob.php b/apps/federation/lib/SyncJob.php
index b802dfa9308..1e09ca2b054 100644
--- a/apps/federation/lib/SyncJob.php
+++ b/apps/federation/lib/SyncJob.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2017-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/apps/files/lib/Activity/Filter/FileChanges.php b/apps/files/lib/Activity/Filter/FileChanges.php
index 0ca8f6792e0..b625f5461fe 100644
--- a/apps/files/lib/Activity/Filter/FileChanges.php
+++ b/apps/files/lib/Activity/Filter/FileChanges.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/apps/files/lib/Activity/Settings/FavoriteAction.php b/apps/files/lib/Activity/Settings/FavoriteAction.php
index 73b200341ec..0da3232c4fb 100644
--- a/apps/files/lib/Activity/Settings/FavoriteAction.php
+++ b/apps/files/lib/Activity/Settings/FavoriteAction.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/apps/files/lib/Activity/Settings/FileChanged.php b/apps/files/lib/Activity/Settings/FileChanged.php
index c33ed5e1eba..f5f98dd30d3 100644
--- a/apps/files/lib/Activity/Settings/FileChanged.php
+++ b/apps/files/lib/Activity/Settings/FileChanged.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/apps/files/lib/Activity/Settings/FileFavoriteChanged.php b/apps/files/lib/Activity/Settings/FileFavoriteChanged.php
index 5000902ed3f..52e0fcaeb76 100644
--- a/apps/files/lib/Activity/Settings/FileFavoriteChanged.php
+++ b/apps/files/lib/Activity/Settings/FileFavoriteChanged.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/apps/files/lib/Capabilities.php b/apps/files/lib/Capabilities.php
index 6b50e5807a5..43eb270922f 100644
--- a/apps/files/lib/Capabilities.php
+++ b/apps/files/lib/Capabilities.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/apps/files/templates/index.php b/apps/files/templates/index.php
index 5281220282a..7f74508bef2 100644
--- a/apps/files/templates/index.php
+++ b/apps/files/templates/index.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/apps/files_external/appinfo/routes.php b/apps/files_external/appinfo/routes.php
index 348c6f9d69e..b6f4144c6f2 100644
--- a/apps/files_external/appinfo/routes.php
+++ b/apps/files_external/appinfo/routes.php
@@ -1,11 +1,12 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2018-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
  * SPDX-License-Identifier: AGPL-3.0-only
  */
-
 return [
 	'resources' => [
 		'global_storages' => ['url' => '/globalstorages'],
diff --git a/apps/files_external/lib/Command/Dependencies.php b/apps/files_external/lib/Command/Dependencies.php
index d2db8a8c9af..01e60abe505 100644
--- a/apps/files_external/lib/Command/Dependencies.php
+++ b/apps/files_external/lib/Command/Dependencies.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2025 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-only
diff --git a/apps/files_external/lib/Command/Export.php b/apps/files_external/lib/Command/Export.php
index 59484d0e788..ef8b894dafd 100644
--- a/apps/files_external/lib/Command/Export.php
+++ b/apps/files_external/lib/Command/Export.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/apps/files_external/lib/Config/IConfigHandler.php b/apps/files_external/lib/Config/IConfigHandler.php
index 9e8283cc58b..aa9709db600 100644
--- a/apps/files_external/lib/Config/IConfigHandler.php
+++ b/apps/files_external/lib/Config/IConfigHandler.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2019 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/apps/files_external/lib/Config/UserPlaceholderHandler.php b/apps/files_external/lib/Config/UserPlaceholderHandler.php
index d158e6923c1..a6365ca114c 100644
--- a/apps/files_external/lib/Config/UserPlaceholderHandler.php
+++ b/apps/files_external/lib/Config/UserPlaceholderHandler.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2019 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/apps/files_external/lib/Lib/Auth/AmazonS3/AccessKey.php b/apps/files_external/lib/Lib/Auth/AmazonS3/AccessKey.php
index c86c88a13d7..cd03999f3cb 100644
--- a/apps/files_external/lib/Lib/Auth/AmazonS3/AccessKey.php
+++ b/apps/files_external/lib/Lib/Auth/AmazonS3/AccessKey.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2018-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/apps/files_external/lib/Lib/Auth/AuthMechanism.php b/apps/files_external/lib/Lib/Auth/AuthMechanism.php
index 7b0544100fb..71b138bacf2 100644
--- a/apps/files_external/lib/Lib/Auth/AuthMechanism.php
+++ b/apps/files_external/lib/Lib/Auth/AuthMechanism.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2017-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/apps/files_external/lib/Lib/Auth/Builtin.php b/apps/files_external/lib/Lib/Auth/Builtin.php
index 8e12a6daca6..1fb16c14dcc 100644
--- a/apps/files_external/lib/Lib/Auth/Builtin.php
+++ b/apps/files_external/lib/Lib/Auth/Builtin.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2019-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/apps/files_external/lib/Lib/Auth/IUserProvided.php b/apps/files_external/lib/Lib/Auth/IUserProvided.php
index 2350d7f6db4..225c8c84d5f 100644
--- a/apps/files_external/lib/Lib/Auth/IUserProvided.php
+++ b/apps/files_external/lib/Lib/Auth/IUserProvided.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
  * SPDX-License-Identifier: AGPL-3.0-only
diff --git a/apps/files_external/lib/Lib/Auth/NullMechanism.php b/apps/files_external/lib/Lib/Auth/NullMechanism.php
index 8e2e5b656b2..00f75822c65 100644
--- a/apps/files_external/lib/Lib/Auth/NullMechanism.php
+++ b/apps/files_external/lib/Lib/Auth/NullMechanism.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2019-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/apps/files_external/lib/Lib/Auth/OpenStack/OpenStackV2.php b/apps/files_external/lib/Lib/Auth/OpenStack/OpenStackV2.php
index 3b1c9f123af..aa3dc14c42d 100644
--- a/apps/files_external/lib/Lib/Auth/OpenStack/OpenStackV2.php
+++ b/apps/files_external/lib/Lib/Auth/OpenStack/OpenStackV2.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2019-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/apps/files_external/lib/Lib/Auth/OpenStack/Rackspace.php b/apps/files_external/lib/Lib/Auth/OpenStack/Rackspace.php
index b1d1068e586..d64f5f8dc5b 100644
--- a/apps/files_external/lib/Lib/Auth/OpenStack/Rackspace.php
+++ b/apps/files_external/lib/Lib/Auth/OpenStack/Rackspace.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2018-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/apps/files_external/lib/Lib/Auth/Password/Password.php b/apps/files_external/lib/Lib/Auth/Password/Password.php
index d4291148e3e..e3299e93669 100644
--- a/apps/files_external/lib/Lib/Auth/Password/Password.php
+++ b/apps/files_external/lib/Lib/Auth/Password/Password.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2018-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/apps/files_external/lib/Lib/Auth/Password/SessionCredentials.php b/apps/files_external/lib/Lib/Auth/Password/SessionCredentials.php
index 8f161073771..71d277bd72d 100644
--- a/apps/files_external/lib/Lib/Auth/Password/SessionCredentials.php
+++ b/apps/files_external/lib/Lib/Auth/Password/SessionCredentials.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2017-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/apps/files_external/lib/Lib/Auth/SMB/KerberosApacheAuth.php b/apps/files_external/lib/Lib/Auth/SMB/KerberosApacheAuth.php
index 26671110294..3eeec85ca13 100644
--- a/apps/files_external/lib/Lib/Auth/SMB/KerberosApacheAuth.php
+++ b/apps/files_external/lib/Lib/Auth/SMB/KerberosApacheAuth.php
@@ -1,10 +1,11 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2018 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
  */
-
 namespace OCA\Files_External\Lib\Auth\SMB;
 
 use OCA\Files_External\Lib\Auth\AuthMechanism;
diff --git a/apps/files_external/lib/Lib/Auth/SMB/KerberosAuth.php b/apps/files_external/lib/Lib/Auth/SMB/KerberosAuth.php
index 9210209192a..45b0b582509 100644
--- a/apps/files_external/lib/Lib/Auth/SMB/KerberosAuth.php
+++ b/apps/files_external/lib/Lib/Auth/SMB/KerberosAuth.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2018 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/apps/files_external/lib/Lib/Backend/AmazonS3.php b/apps/files_external/lib/Lib/Backend/AmazonS3.php
index 9eb479e03f0..06a1a67d723 100644
--- a/apps/files_external/lib/Lib/Backend/AmazonS3.php
+++ b/apps/files_external/lib/Lib/Backend/AmazonS3.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2017-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/apps/files_external/lib/Lib/Backend/DAV.php b/apps/files_external/lib/Lib/Backend/DAV.php
index dea9e7c5e77..7c393393be8 100644
--- a/apps/files_external/lib/Lib/Backend/DAV.php
+++ b/apps/files_external/lib/Lib/Backend/DAV.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2018-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/apps/files_external/lib/Lib/Backend/FTP.php b/apps/files_external/lib/Lib/Backend/FTP.php
index 72a8184c9b9..ab276b871f8 100644
--- a/apps/files_external/lib/Lib/Backend/FTP.php
+++ b/apps/files_external/lib/Lib/Backend/FTP.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2018-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/apps/files_external/lib/Lib/Backend/Local.php b/apps/files_external/lib/Lib/Backend/Local.php
index 56940b8e83b..59ab6c3ae68 100644
--- a/apps/files_external/lib/Lib/Backend/Local.php
+++ b/apps/files_external/lib/Lib/Backend/Local.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2018-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/apps/files_external/lib/Lib/Backend/OwnCloud.php b/apps/files_external/lib/Lib/Backend/OwnCloud.php
index 0c0e2c6d300..fe2cb990a1f 100644
--- a/apps/files_external/lib/Lib/Backend/OwnCloud.php
+++ b/apps/files_external/lib/Lib/Backend/OwnCloud.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2017-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/apps/files_external/lib/Lib/Backend/SFTP.php b/apps/files_external/lib/Lib/Backend/SFTP.php
index 1ec0d344dd1..58258d126c6 100644
--- a/apps/files_external/lib/Lib/Backend/SFTP.php
+++ b/apps/files_external/lib/Lib/Backend/SFTP.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2017-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/apps/files_external/lib/Lib/Backend/SFTP_Key.php b/apps/files_external/lib/Lib/Backend/SFTP_Key.php
index 278fae3fba7..49a2b9b9417 100644
--- a/apps/files_external/lib/Lib/Backend/SFTP_Key.php
+++ b/apps/files_external/lib/Lib/Backend/SFTP_Key.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2018-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/apps/files_external/lib/Lib/Backend/SMB_OC.php b/apps/files_external/lib/Lib/Backend/SMB_OC.php
index bcb8d0fbf16..25e1b60254a 100644
--- a/apps/files_external/lib/Lib/Backend/SMB_OC.php
+++ b/apps/files_external/lib/Lib/Backend/SMB_OC.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2018-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/apps/files_external/lib/Lib/Backend/Swift.php b/apps/files_external/lib/Lib/Backend/Swift.php
index 37527ba3dbb..452e7546ec2 100644
--- a/apps/files_external/lib/Lib/Backend/Swift.php
+++ b/apps/files_external/lib/Lib/Backend/Swift.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2018-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/apps/files_external/lib/Lib/Config/IAuthMechanismProvider.php b/apps/files_external/lib/Lib/Config/IAuthMechanismProvider.php
index 0c2e90a243c..c34c261ffd7 100644
--- a/apps/files_external/lib/Lib/Config/IAuthMechanismProvider.php
+++ b/apps/files_external/lib/Lib/Config/IAuthMechanismProvider.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2019-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/apps/files_external/lib/Lib/Config/IBackendProvider.php b/apps/files_external/lib/Lib/Config/IBackendProvider.php
index 44c460c3138..9a88ff84556 100644
--- a/apps/files_external/lib/Lib/Config/IBackendProvider.php
+++ b/apps/files_external/lib/Lib/Config/IBackendProvider.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2019-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/apps/files_external/lib/Lib/DefinitionParameter.php b/apps/files_external/lib/Lib/DefinitionParameter.php
index a73dd2df967..ce0cadc37fb 100644
--- a/apps/files_external/lib/Lib/DefinitionParameter.php
+++ b/apps/files_external/lib/Lib/DefinitionParameter.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2019-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/apps/files_external/lib/Lib/DependencyTrait.php b/apps/files_external/lib/Lib/DependencyTrait.php
index 644132b82bc..b62085dbe45 100644
--- a/apps/files_external/lib/Lib/DependencyTrait.php
+++ b/apps/files_external/lib/Lib/DependencyTrait.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2018-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/apps/files_external/lib/Lib/IFrontendDefinition.php b/apps/files_external/lib/Lib/IFrontendDefinition.php
index c8b06a1c30b..7eb9a509c14 100644
--- a/apps/files_external/lib/Lib/IFrontendDefinition.php
+++ b/apps/files_external/lib/Lib/IFrontendDefinition.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2022 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/apps/files_external/lib/Lib/IIdentifier.php b/apps/files_external/lib/Lib/IIdentifier.php
index 0677409a3cf..e17b908a0b1 100644
--- a/apps/files_external/lib/Lib/IIdentifier.php
+++ b/apps/files_external/lib/Lib/IIdentifier.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2022 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/apps/files_external/lib/Lib/SessionStorageWrapper.php b/apps/files_external/lib/Lib/SessionStorageWrapper.php
index 8754041b2fa..ea5d788be8f 100644
--- a/apps/files_external/lib/Lib/SessionStorageWrapper.php
+++ b/apps/files_external/lib/Lib/SessionStorageWrapper.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2018-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/apps/files_external/lib/Lib/StorageModifierTrait.php b/apps/files_external/lib/Lib/StorageModifierTrait.php
index 4062ff1635e..21ddd6bf828 100644
--- a/apps/files_external/lib/Lib/StorageModifierTrait.php
+++ b/apps/files_external/lib/Lib/StorageModifierTrait.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2018-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/apps/files_external/lib/NotFoundException.php b/apps/files_external/lib/NotFoundException.php
index 411a2212513..c4534be6c19 100644
--- a/apps/files_external/lib/NotFoundException.php
+++ b/apps/files_external/lib/NotFoundException.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2019-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/apps/files_external/lib/Service/ImportLegacyStoragesService.php b/apps/files_external/lib/Service/ImportLegacyStoragesService.php
index 7d9840e9f5e..426561adbfc 100644
--- a/apps/files_external/lib/Service/ImportLegacyStoragesService.php
+++ b/apps/files_external/lib/Service/ImportLegacyStoragesService.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
  * SPDX-License-Identifier: AGPL-3.0-only
diff --git a/apps/files_external/lib/Settings/Personal.php b/apps/files_external/lib/Settings/Personal.php
index af38c6bff58..569fbd858fd 100644
--- a/apps/files_external/lib/Settings/Personal.php
+++ b/apps/files_external/lib/Settings/Personal.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2017 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/apps/files_external/lib/Settings/PersonalSection.php b/apps/files_external/lib/Settings/PersonalSection.php
index c6eb1c6b889..fce0e99a67c 100644
--- a/apps/files_external/lib/Settings/PersonalSection.php
+++ b/apps/files_external/lib/Settings/PersonalSection.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2017 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/apps/files_external/lib/Settings/Section.php b/apps/files_external/lib/Settings/Section.php
index cf3b73472d7..2fca049d152 100644
--- a/apps/files_external/lib/Settings/Section.php
+++ b/apps/files_external/lib/Settings/Section.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/apps/files_external/tests/config.php b/apps/files_external/tests/config.php
index ec860cf05a4..286224be7a3 100644
--- a/apps/files_external/tests/config.php
+++ b/apps/files_external/tests/config.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2017-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2012-2016 ownCloud, Inc.
diff --git a/apps/files_external/tests/sso-setup/apps.config.php b/apps/files_external/tests/sso-setup/apps.config.php
index b3889956a53..8480a4e390f 100644
--- a/apps/files_external/tests/sso-setup/apps.config.php
+++ b/apps/files_external/tests/sso-setup/apps.config.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2023 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/apps/files_sharing/appinfo/routes.php b/apps/files_sharing/appinfo/routes.php
index f9e10ebb106..a78a99fa8cc 100644
--- a/apps/files_sharing/appinfo/routes.php
+++ b/apps/files_sharing/appinfo/routes.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/apps/files_sharing/lib/Activity/Filter.php b/apps/files_sharing/lib/Activity/Filter.php
index 4f3c4a7c914..6e1110e6f29 100644
--- a/apps/files_sharing/lib/Activity/Filter.php
+++ b/apps/files_sharing/lib/Activity/Filter.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/apps/files_sharing/lib/Activity/Settings/PublicLinks.php b/apps/files_sharing/lib/Activity/Settings/PublicLinks.php
index 0d3d00d2a7b..3e6d7224a88 100644
--- a/apps/files_sharing/lib/Activity/Settings/PublicLinks.php
+++ b/apps/files_sharing/lib/Activity/Settings/PublicLinks.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/apps/files_sharing/lib/Activity/Settings/PublicLinksUpload.php b/apps/files_sharing/lib/Activity/Settings/PublicLinksUpload.php
index fd55752632d..1e75cb20102 100644
--- a/apps/files_sharing/lib/Activity/Settings/PublicLinksUpload.php
+++ b/apps/files_sharing/lib/Activity/Settings/PublicLinksUpload.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/apps/files_sharing/lib/Activity/Settings/RemoteShare.php b/apps/files_sharing/lib/Activity/Settings/RemoteShare.php
index c04364bef20..c9666e3d7ea 100644
--- a/apps/files_sharing/lib/Activity/Settings/RemoteShare.php
+++ b/apps/files_sharing/lib/Activity/Settings/RemoteShare.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/apps/files_sharing/lib/Activity/Settings/Shared.php b/apps/files_sharing/lib/Activity/Settings/Shared.php
index 3717512eebd..60f837efd5c 100644
--- a/apps/files_sharing/lib/Activity/Settings/Shared.php
+++ b/apps/files_sharing/lib/Activity/Settings/Shared.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/apps/files_sharing/lib/Exceptions/BrokenPath.php b/apps/files_sharing/lib/Exceptions/BrokenPath.php
index a68a8fc05d4..1bd0c9cc8ab 100644
--- a/apps/files_sharing/lib/Exceptions/BrokenPath.php
+++ b/apps/files_sharing/lib/Exceptions/BrokenPath.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2020-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/apps/files_sharing/lib/Exceptions/S2SException.php b/apps/files_sharing/lib/Exceptions/S2SException.php
index 10360820432..00c66a55655 100644
--- a/apps/files_sharing/lib/Exceptions/S2SException.php
+++ b/apps/files_sharing/lib/Exceptions/S2SException.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
  * SPDX-License-Identifier: AGPL-3.0-only
diff --git a/apps/files_sharing/lib/Exceptions/SharingRightsException.php b/apps/files_sharing/lib/Exceptions/SharingRightsException.php
index 2ffe72c4e69..e1144bc6a17 100644
--- a/apps/files_sharing/lib/Exceptions/SharingRightsException.php
+++ b/apps/files_sharing/lib/Exceptions/SharingRightsException.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2019 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/apps/files_sharing/lib/External/Watcher.php b/apps/files_sharing/lib/External/Watcher.php
index f3616feabba..e8c8637905f 100644
--- a/apps/files_sharing/lib/External/Watcher.php
+++ b/apps/files_sharing/lib/External/Watcher.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2019-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/apps/files_sharing/lib/ISharedStorage.php b/apps/files_sharing/lib/ISharedStorage.php
index 9bd3e4c9476..e611f0d918f 100644
--- a/apps/files_sharing/lib/ISharedStorage.php
+++ b/apps/files_sharing/lib/ISharedStorage.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2019-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/apps/files_sharing/lib/Middleware/OCSShareAPIMiddleware.php b/apps/files_sharing/lib/Middleware/OCSShareAPIMiddleware.php
index 6671a78efff..7f458b2b53b 100644
--- a/apps/files_sharing/lib/Middleware/OCSShareAPIMiddleware.php
+++ b/apps/files_sharing/lib/Middleware/OCSShareAPIMiddleware.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/apps/files_sharing/lib/Middleware/ShareInfoMiddleware.php b/apps/files_sharing/lib/Middleware/ShareInfoMiddleware.php
index e96940979bf..e4ba2c88b17 100644
--- a/apps/files_sharing/lib/Middleware/ShareInfoMiddleware.php
+++ b/apps/files_sharing/lib/Middleware/ShareInfoMiddleware.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/apps/files_trashbin/lib/Capabilities.php b/apps/files_trashbin/lib/Capabilities.php
index 53c17a475ff..2f55017fac8 100644
--- a/apps/files_trashbin/lib/Capabilities.php
+++ b/apps/files_trashbin/lib/Capabilities.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2019-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/apps/files_trashbin/lib/Events/MoveToTrashEvent.php b/apps/files_trashbin/lib/Events/MoveToTrashEvent.php
index 0d776b606b1..9deba900201 100644
--- a/apps/files_trashbin/lib/Events/MoveToTrashEvent.php
+++ b/apps/files_trashbin/lib/Events/MoveToTrashEvent.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2017 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/apps/files_trashbin/lib/Exceptions/CopyRecursiveException.php b/apps/files_trashbin/lib/Exceptions/CopyRecursiveException.php
index 3ea1293e5d7..cec6c92ce6f 100644
--- a/apps/files_trashbin/lib/Exceptions/CopyRecursiveException.php
+++ b/apps/files_trashbin/lib/Exceptions/CopyRecursiveException.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
  * SPDX-License-Identifier: AGPL-3.0-only
diff --git a/apps/files_trashbin/lib/Trash/BackendNotFoundException.php b/apps/files_trashbin/lib/Trash/BackendNotFoundException.php
index 292b6ee293c..2e275c3b376 100644
--- a/apps/files_trashbin/lib/Trash/BackendNotFoundException.php
+++ b/apps/files_trashbin/lib/Trash/BackendNotFoundException.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2018 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/apps/files_trashbin/lib/Trash/ITrashBackend.php b/apps/files_trashbin/lib/Trash/ITrashBackend.php
index 11b3132bfba..0e30c5972bd 100644
--- a/apps/files_trashbin/lib/Trash/ITrashBackend.php
+++ b/apps/files_trashbin/lib/Trash/ITrashBackend.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2018 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/apps/files_trashbin/lib/Trash/ITrashItem.php b/apps/files_trashbin/lib/Trash/ITrashItem.php
index 299cac49a69..c439ccee37e 100644
--- a/apps/files_trashbin/lib/Trash/ITrashItem.php
+++ b/apps/files_trashbin/lib/Trash/ITrashItem.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2018 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/apps/files_trashbin/lib/Trash/ITrashManager.php b/apps/files_trashbin/lib/Trash/ITrashManager.php
index 743ea01358a..26877f6697c 100644
--- a/apps/files_trashbin/lib/Trash/ITrashManager.php
+++ b/apps/files_trashbin/lib/Trash/ITrashManager.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2018 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/apps/files_versions/appinfo/routes.php b/apps/files_versions/appinfo/routes.php
index 22ded5e8723..7eb9c821a25 100644
--- a/apps/files_versions/appinfo/routes.php
+++ b/apps/files_versions/appinfo/routes.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/apps/files_versions/lib/Capabilities.php b/apps/files_versions/lib/Capabilities.php
index cb6394f0a36..248231c69be 100644
--- a/apps/files_versions/lib/Capabilities.php
+++ b/apps/files_versions/lib/Capabilities.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2019 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/apps/files_versions/lib/Versions/BackendNotFoundException.php b/apps/files_versions/lib/Versions/BackendNotFoundException.php
index f1fbecb852a..abed50a388b 100644
--- a/apps/files_versions/lib/Versions/BackendNotFoundException.php
+++ b/apps/files_versions/lib/Versions/BackendNotFoundException.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2018 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/apps/oauth2/appinfo/routes.php b/apps/oauth2/appinfo/routes.php
index b34aff05552..eadac04f47f 100644
--- a/apps/oauth2/appinfo/routes.php
+++ b/apps/oauth2/appinfo/routes.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2017 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/apps/oauth2/lib/Db/AccessToken.php b/apps/oauth2/lib/Db/AccessToken.php
index 34adc4f4797..20273718925 100644
--- a/apps/oauth2/lib/Db/AccessToken.php
+++ b/apps/oauth2/lib/Db/AccessToken.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2017 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/apps/oauth2/lib/Db/Client.php b/apps/oauth2/lib/Db/Client.php
index 8fce0040c96..b121951993c 100644
--- a/apps/oauth2/lib/Db/Client.php
+++ b/apps/oauth2/lib/Db/Client.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2017 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/apps/provisioning_api/appinfo/routes.php b/apps/provisioning_api/appinfo/routes.php
index df4f806fa08..474a716f852 100644
--- a/apps/provisioning_api/appinfo/routes.php
+++ b/apps/provisioning_api/appinfo/routes.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/apps/provisioning_api/lib/Middleware/Exceptions/NotSubAdminException.php b/apps/provisioning_api/lib/Middleware/Exceptions/NotSubAdminException.php
index b014d6a1495..771d29bbafb 100644
--- a/apps/provisioning_api/lib/Middleware/Exceptions/NotSubAdminException.php
+++ b/apps/provisioning_api/lib/Middleware/Exceptions/NotSubAdminException.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/apps/settings/lib/Activity/GroupSetting.php b/apps/settings/lib/Activity/GroupSetting.php
index 917f4a7ef26..a97c233e6d9 100644
--- a/apps/settings/lib/Activity/GroupSetting.php
+++ b/apps/settings/lib/Activity/GroupSetting.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2017 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/apps/settings/lib/Activity/SecurityFilter.php b/apps/settings/lib/Activity/SecurityFilter.php
index 9a32e82a984..283b0862ae6 100644
--- a/apps/settings/lib/Activity/SecurityFilter.php
+++ b/apps/settings/lib/Activity/SecurityFilter.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/apps/settings/lib/Activity/SecuritySetting.php b/apps/settings/lib/Activity/SecuritySetting.php
index 9226b5aea5b..5a42db555f2 100644
--- a/apps/settings/lib/Activity/SecuritySetting.php
+++ b/apps/settings/lib/Activity/SecuritySetting.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/apps/settings/lib/Activity/Setting.php b/apps/settings/lib/Activity/Setting.php
index f9c659594d6..dcc308e2950 100644
--- a/apps/settings/lib/Activity/Setting.php
+++ b/apps/settings/lib/Activity/Setting.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2017 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/apps/settings/lib/Listener/GroupRemovedListener.php b/apps/settings/lib/Listener/GroupRemovedListener.php
index c1b3f888ea8..ae739446607 100644
--- a/apps/settings/lib/Listener/GroupRemovedListener.php
+++ b/apps/settings/lib/Listener/GroupRemovedListener.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2021 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/apps/settings/lib/Sections/Admin/Delegation.php b/apps/settings/lib/Sections/Admin/Delegation.php
index 0dd3b48c20b..24bb555eae8 100644
--- a/apps/settings/lib/Sections/Admin/Delegation.php
+++ b/apps/settings/lib/Sections/Admin/Delegation.php
@@ -1,10 +1,11 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2021 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
  */
-
 namespace OCA\Settings\Sections\Admin;
 
 use OCP\IL10N;
diff --git a/apps/settings/lib/Service/ConflictException.php b/apps/settings/lib/Service/ConflictException.php
index eab17d7cf0b..9dbd5aa2993 100644
--- a/apps/settings/lib/Service/ConflictException.php
+++ b/apps/settings/lib/Service/ConflictException.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2025 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/apps/settings/lib/Service/NotFoundException.php b/apps/settings/lib/Service/NotFoundException.php
index 3abdcf72cd4..b72779349a9 100644
--- a/apps/settings/lib/Service/NotFoundException.php
+++ b/apps/settings/lib/Service/NotFoundException.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2021 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/apps/settings/lib/Service/ServiceException.php b/apps/settings/lib/Service/ServiceException.php
index 79c848779ca..a9ef5f87627 100644
--- a/apps/settings/lib/Service/ServiceException.php
+++ b/apps/settings/lib/Service/ServiceException.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2021 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/apps/settings/lib/Settings/Admin/Overview.php b/apps/settings/lib/Settings/Admin/Overview.php
index 67ef51b7d53..8e35605429f 100644
--- a/apps/settings/lib/Settings/Admin/Overview.php
+++ b/apps/settings/lib/Settings/Admin/Overview.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2018 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/apps/settings/lib/Settings/Personal/Additional.php b/apps/settings/lib/Settings/Personal/Additional.php
index 58fe08a63b7..52b2a33a05d 100644
--- a/apps/settings/lib/Settings/Personal/Additional.php
+++ b/apps/settings/lib/Settings/Personal/Additional.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2017 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/apps/settings/templates/settings/empty.php b/apps/settings/templates/settings/empty.php
index aab6717b496..9c48245c98a 100644
--- a/apps/settings/templates/settings/empty.php
+++ b/apps/settings/templates/settings/empty.php
@@ -1,8 +1,9 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2017 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
  */
-
 // Empty template as Vue will take over the `id="content"` of the base template element
diff --git a/apps/sharebymail/lib/Settings/Admin.php b/apps/sharebymail/lib/Settings/Admin.php
index 48592e74ff6..ff7aff90312 100644
--- a/apps/sharebymail/lib/Settings/Admin.php
+++ b/apps/sharebymail/lib/Settings/Admin.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2017 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/apps/systemtags/appinfo/routes.php b/apps/systemtags/appinfo/routes.php
index 53997646cc6..82151690fa7 100644
--- a/apps/systemtags/appinfo/routes.php
+++ b/apps/systemtags/appinfo/routes.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/apps/systemtags/lib/Activity/Setting.php b/apps/systemtags/lib/Activity/Setting.php
index 8f39ef41d26..84e5bc0f66a 100644
--- a/apps/systemtags/lib/Activity/Setting.php
+++ b/apps/systemtags/lib/Activity/Setting.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/apps/systemtags/lib/Settings/Admin.php b/apps/systemtags/lib/Settings/Admin.php
index a59c92cc1e6..27f492e1a22 100644
--- a/apps/systemtags/lib/Settings/Admin.php
+++ b/apps/systemtags/lib/Settings/Admin.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/apps/testing/appinfo/routes.php b/apps/testing/appinfo/routes.php
index 25b16f420dd..4feb75b88cd 100644
--- a/apps/testing/appinfo/routes.php
+++ b/apps/testing/appinfo/routes.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2017-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2015-2016 ownCloud, Inc.
diff --git a/apps/testing/clean_apcu_cache.php b/apps/testing/clean_apcu_cache.php
index 26cc000b096..2ba01c59907 100644
--- a/apps/testing/clean_apcu_cache.php
+++ b/apps/testing/clean_apcu_cache.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2025 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/apps/testing/clean_opcode_cache.php b/apps/testing/clean_opcode_cache.php
index acfeece7e15..7ca7af3ab51 100644
--- a/apps/testing/clean_opcode_cache.php
+++ b/apps/testing/clean_opcode_cache.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2017 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/apps/testing/lib/Provider/FakeTextProcessingProvider.php b/apps/testing/lib/Provider/FakeTextProcessingProvider.php
index d3b16c55c67..991d0c605c8 100644
--- a/apps/testing/lib/Provider/FakeTextProcessingProvider.php
+++ b/apps/testing/lib/Provider/FakeTextProcessingProvider.php
@@ -1,10 +1,11 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2023 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
  */
-
 namespace OCA\Testing\Provider;
 
 use OCP\TextProcessing\FreePromptTaskType;
diff --git a/apps/testing/lib/Provider/FakeTextProcessingProviderSync.php b/apps/testing/lib/Provider/FakeTextProcessingProviderSync.php
index ea822199109..01fc200be52 100644
--- a/apps/testing/lib/Provider/FakeTextProcessingProviderSync.php
+++ b/apps/testing/lib/Provider/FakeTextProcessingProviderSync.php
@@ -1,10 +1,11 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2023 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
  */
-
 namespace OCA\Testing\Provider;
 
 use OCP\TextProcessing\FreePromptTaskType;
diff --git a/apps/testing/lib/Provider/FakeTranslationProvider.php b/apps/testing/lib/Provider/FakeTranslationProvider.php
index cc2d13db646..8315cb0960f 100644
--- a/apps/testing/lib/Provider/FakeTranslationProvider.php
+++ b/apps/testing/lib/Provider/FakeTranslationProvider.php
@@ -1,10 +1,11 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2023 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
  */
-
 namespace OCA\Testing\Provider;
 
 use OCP\Translation\ITranslationProvider;
diff --git a/apps/theming/appinfo/routes.php b/apps/theming/appinfo/routes.php
index b0aedbbb803..ee83fa5bc17 100644
--- a/apps/theming/appinfo/routes.php
+++ b/apps/theming/appinfo/routes.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/apps/theming/lib/AppInfo/Application.php b/apps/theming/lib/AppInfo/Application.php
index d08a1903265..c0a69e5189a 100644
--- a/apps/theming/lib/AppInfo/Application.php
+++ b/apps/theming/lib/AppInfo/Application.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2019 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/apps/theming/lib/Command/UpdateConfig.php b/apps/theming/lib/Command/UpdateConfig.php
index 6236f866445..d0b72ebbc37 100644
--- a/apps/theming/lib/Command/UpdateConfig.php
+++ b/apps/theming/lib/Command/UpdateConfig.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2020 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/apps/theming/lib/Settings/Admin.php b/apps/theming/lib/Settings/Admin.php
index 518afe23189..ed1f4361215 100644
--- a/apps/theming/lib/Settings/Admin.php
+++ b/apps/theming/lib/Settings/Admin.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/apps/theming/lib/Settings/AdminSection.php b/apps/theming/lib/Settings/AdminSection.php
index a1ea568d9f2..007b3e904de 100644
--- a/apps/theming/lib/Settings/AdminSection.php
+++ b/apps/theming/lib/Settings/AdminSection.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/apps/theming/lib/Settings/PersonalSection.php b/apps/theming/lib/Settings/PersonalSection.php
index c8078bd1577..ce636f50764 100644
--- a/apps/theming/lib/Settings/PersonalSection.php
+++ b/apps/theming/lib/Settings/PersonalSection.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2018 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/apps/updatenotification/templates/empty.php b/apps/updatenotification/templates/empty.php
index 6e020c591ed..cb4d4403a82 100644
--- a/apps/updatenotification/templates/empty.php
+++ b/apps/updatenotification/templates/empty.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/apps/user_ldap/lib/BackendUtility.php b/apps/user_ldap/lib/BackendUtility.php
index 88d7311cde0..65512fc2cf8 100644
--- a/apps/user_ldap/lib/BackendUtility.php
+++ b/apps/user_ldap/lib/BackendUtility.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2019-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/apps/user_ldap/lib/Exceptions/AttributeNotSet.php b/apps/user_ldap/lib/Exceptions/AttributeNotSet.php
index 4d6053eda66..73465c1daad 100644
--- a/apps/user_ldap/lib/Exceptions/AttributeNotSet.php
+++ b/apps/user_ldap/lib/Exceptions/AttributeNotSet.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2019 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/apps/user_ldap/lib/Exceptions/ConstraintViolationException.php b/apps/user_ldap/lib/Exceptions/ConstraintViolationException.php
index d0d384c31de..22ce85da354 100644
--- a/apps/user_ldap/lib/Exceptions/ConstraintViolationException.php
+++ b/apps/user_ldap/lib/Exceptions/ConstraintViolationException.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2017 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/apps/user_ldap/lib/Exceptions/NotOnLDAP.php b/apps/user_ldap/lib/Exceptions/NotOnLDAP.php
index cd74e918829..4c4301130f2 100644
--- a/apps/user_ldap/lib/Exceptions/NotOnLDAP.php
+++ b/apps/user_ldap/lib/Exceptions/NotOnLDAP.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/apps/user_ldap/lib/IGroupLDAP.php b/apps/user_ldap/lib/IGroupLDAP.php
index 667eb421004..e10e4fe10b4 100644
--- a/apps/user_ldap/lib/IGroupLDAP.php
+++ b/apps/user_ldap/lib/IGroupLDAP.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2017 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/apps/user_ldap/lib/ILDAPGroupPlugin.php b/apps/user_ldap/lib/ILDAPGroupPlugin.php
index 261b9383dc1..bb9a5a6066e 100644
--- a/apps/user_ldap/lib/ILDAPGroupPlugin.php
+++ b/apps/user_ldap/lib/ILDAPGroupPlugin.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2017 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/apps/user_ldap/lib/ILDAPUserPlugin.php b/apps/user_ldap/lib/ILDAPUserPlugin.php
index 80437bef452..14903784102 100644
--- a/apps/user_ldap/lib/ILDAPUserPlugin.php
+++ b/apps/user_ldap/lib/ILDAPUserPlugin.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2017 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/apps/user_ldap/lib/ILDAPWrapper.php b/apps/user_ldap/lib/ILDAPWrapper.php
index 793eb2b73dc..c8b388575eb 100644
--- a/apps/user_ldap/lib/ILDAPWrapper.php
+++ b/apps/user_ldap/lib/ILDAPWrapper.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/apps/user_ldap/lib/IUserLDAP.php b/apps/user_ldap/lib/IUserLDAP.php
index 5e8e29c3adf..6e730fbe941 100644
--- a/apps/user_ldap/lib/IUserLDAP.php
+++ b/apps/user_ldap/lib/IUserLDAP.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/apps/user_ldap/lib/LDAPUtility.php b/apps/user_ldap/lib/LDAPUtility.php
index 39b517528e2..b9cbc70a82d 100644
--- a/apps/user_ldap/lib/LDAPUtility.php
+++ b/apps/user_ldap/lib/LDAPUtility.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2019-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/apps/user_ldap/lib/Mapping/GroupMapping.php b/apps/user_ldap/lib/Mapping/GroupMapping.php
index d9ae5e749fc..bd8ed8d64fd 100644
--- a/apps/user_ldap/lib/Mapping/GroupMapping.php
+++ b/apps/user_ldap/lib/Mapping/GroupMapping.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2019-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/apps/user_ldap/lib/Migration/UUIDFixGroup.php b/apps/user_ldap/lib/Migration/UUIDFixGroup.php
index 3924c91e7ba..58e157eccbc 100644
--- a/apps/user_ldap/lib/Migration/UUIDFixGroup.php
+++ b/apps/user_ldap/lib/Migration/UUIDFixGroup.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2017 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/apps/user_ldap/lib/Migration/UUIDFixUser.php b/apps/user_ldap/lib/Migration/UUIDFixUser.php
index 71c3f638095..9ca028d1f8a 100644
--- a/apps/user_ldap/lib/Migration/UUIDFixUser.php
+++ b/apps/user_ldap/lib/Migration/UUIDFixUser.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2017 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/apps/user_ldap/lib/Service/BirthdateParserService.php b/apps/user_ldap/lib/Service/BirthdateParserService.php
index 8234161b3d8..189b440843d 100644
--- a/apps/user_ldap/lib/Service/BirthdateParserService.php
+++ b/apps/user_ldap/lib/Service/BirthdateParserService.php
@@ -1,10 +1,11 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
  */
-
 namespace OCA\User_LDAP\Service;
 
 use DateTimeImmutable;
diff --git a/apps/user_ldap/lib/Settings/Section.php b/apps/user_ldap/lib/Settings/Section.php
index 3b95e25513d..8abc77cb328 100644
--- a/apps/user_ldap/lib/Settings/Section.php
+++ b/apps/user_ldap/lib/Settings/Section.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/apps/user_ldap/tests/Integration/Bootstrap.php b/apps/user_ldap/tests/Integration/Bootstrap.php
index ef0909d4bea..5f2f50f95e3 100644
--- a/apps/user_ldap/tests/Integration/Bootstrap.php
+++ b/apps/user_ldap/tests/Integration/Bootstrap.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/apps/workflowengine/appinfo/routes.php b/apps/workflowengine/appinfo/routes.php
index 48e5ed2ef4e..7937c65124c 100644
--- a/apps/workflowengine/appinfo/routes.php
+++ b/apps/workflowengine/appinfo/routes.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/apps/workflowengine/lib/Settings/Section.php b/apps/workflowengine/lib/Settings/Section.php
index 99de4479dac..a1fff9d3c75 100644
--- a/apps/workflowengine/lib/Settings/Section.php
+++ b/apps/workflowengine/lib/Settings/Section.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/build/rector.php b/build/rector.php
index bd51f7362cb..e94616b16a5 100644
--- a/build/rector.php
+++ b/build/rector.php
@@ -7,6 +7,8 @@ declare(strict_types=1);
  * SPDX-License-Identifier: AGPL-3.0-only
  */
 
+use Rector\TypeDeclaration\Rector\StmtsAwareInterface\SafeDeclareStrictTypesRector;
+
 $nextcloudDir = dirname(__DIR__);
 
 return (require 'rector-shared.php')
@@ -28,4 +30,7 @@ return (require 'rector-shared.php')
 		// $nextcloudDir . '/config',
 		// $nextcloudDir . '/themes',
 	])
-	->withTypeCoverageLevel(0);
+	->withTypeCoverageLevel(0)
+	->withRules([
+		SafeDeclareStrictTypesRector::class
+	]);
diff --git a/core/Command/Encryption/Disable.php b/core/Command/Encryption/Disable.php
index 91d4ac82d23..d6b92a9f236 100644
--- a/core/Command/Encryption/Disable.php
+++ b/core/Command/Encryption/Disable.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/core/Command/Encryption/Enable.php b/core/Command/Encryption/Enable.php
index 02045fa1a4b..c5f7bc6e0e6 100644
--- a/core/Command/Encryption/Enable.php
+++ b/core/Command/Encryption/Enable.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/core/Command/Encryption/EncryptAll.php b/core/Command/Encryption/EncryptAll.php
index ff552253db4..f6cdb2aa155 100644
--- a/core/Command/Encryption/EncryptAll.php
+++ b/core/Command/Encryption/EncryptAll.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/core/Command/Encryption/ShowKeyStorageRoot.php b/core/Command/Encryption/ShowKeyStorageRoot.php
index 8cf97076249..17649a260d0 100644
--- a/core/Command/Encryption/ShowKeyStorageRoot.php
+++ b/core/Command/Encryption/ShowKeyStorageRoot.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/core/Command/Encryption/Status.php b/core/Command/Encryption/Status.php
index 6e4f7d16d0c..7e8d0bd0c01 100644
--- a/core/Command/Encryption/Status.php
+++ b/core/Command/Encryption/Status.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/core/Command/Integrity/CheckCore.php b/core/Command/Integrity/CheckCore.php
index 49086e94d26..1eee2679b70 100644
--- a/core/Command/Integrity/CheckCore.php
+++ b/core/Command/Integrity/CheckCore.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/core/Command/InterruptedException.php b/core/Command/InterruptedException.php
index 661e6672577..c71942e0f6e 100644
--- a/core/Command/InterruptedException.php
+++ b/core/Command/InterruptedException.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2017-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2017 ownCloud, Inc.
diff --git a/core/Command/Maintenance/Mode.php b/core/Command/Maintenance/Mode.php
index 853e843f57b..19a12398022 100644
--- a/core/Command/Maintenance/Mode.php
+++ b/core/Command/Maintenance/Mode.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/core/Command/Maintenance/UpdateHtaccess.php b/core/Command/Maintenance/UpdateHtaccess.php
index eeff3bf8c62..b4a99ddba34 100644
--- a/core/Command/Maintenance/UpdateHtaccess.php
+++ b/core/Command/Maintenance/UpdateHtaccess.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/core/Command/Maintenance/UpdateTheme.php b/core/Command/Maintenance/UpdateTheme.php
index 3fbcb546cca..d4c85ec020d 100644
--- a/core/Command/Maintenance/UpdateTheme.php
+++ b/core/Command/Maintenance/UpdateTheme.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2017 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/core/Command/Status.php b/core/Command/Status.php
index a00d4a94658..b76da40ba20 100644
--- a/core/Command/Status.php
+++ b/core/Command/Status.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/core/Migrations/Version13000Date20170926101637.php b/core/Migrations/Version13000Date20170926101637.php
index aca772de313..61bb690be08 100644
--- a/core/Migrations/Version13000Date20170926101637.php
+++ b/core/Migrations/Version13000Date20170926101637.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/core/templates/print_exception.php b/core/templates/print_exception.php
index bb66d5abce3..2ff528f1fd8 100644
--- a/core/templates/print_exception.php
+++ b/core/templates/print_exception.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 use OCP\IL10N;
 
 /**
diff --git a/core/templates/print_xml_exception.php b/core/templates/print_xml_exception.php
index f103e13545f..fa6ba5a746d 100644
--- a/core/templates/print_xml_exception.php
+++ b/core/templates/print_xml_exception.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 use OCP\IL10N;
 
 /**
diff --git a/lib/private/App/AppStore/Bundles/EducationBundle.php b/lib/private/App/AppStore/Bundles/EducationBundle.php
index 23681ec7416..47a14d3c530 100644
--- a/lib/private/App/AppStore/Bundles/EducationBundle.php
+++ b/lib/private/App/AppStore/Bundles/EducationBundle.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2017 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/lib/private/App/AppStore/Bundles/EnterpriseBundle.php b/lib/private/App/AppStore/Bundles/EnterpriseBundle.php
index fc2d43e0388..fbc4019353b 100644
--- a/lib/private/App/AppStore/Bundles/EnterpriseBundle.php
+++ b/lib/private/App/AppStore/Bundles/EnterpriseBundle.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2017 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/lib/private/App/AppStore/Bundles/GroupwareBundle.php b/lib/private/App/AppStore/Bundles/GroupwareBundle.php
index 93fa70268cd..cddb18cf817 100644
--- a/lib/private/App/AppStore/Bundles/GroupwareBundle.php
+++ b/lib/private/App/AppStore/Bundles/GroupwareBundle.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2017 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/lib/private/App/AppStore/Bundles/PublicSectorBundle.php b/lib/private/App/AppStore/Bundles/PublicSectorBundle.php
index 106a6353029..06c5c6c2c39 100644
--- a/lib/private/App/AppStore/Bundles/PublicSectorBundle.php
+++ b/lib/private/App/AppStore/Bundles/PublicSectorBundle.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/lib/private/App/AppStore/Bundles/SocialSharingBundle.php b/lib/private/App/AppStore/Bundles/SocialSharingBundle.php
index 40f0fb15977..013e8db3a83 100644
--- a/lib/private/App/AppStore/Bundles/SocialSharingBundle.php
+++ b/lib/private/App/AppStore/Bundles/SocialSharingBundle.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2017 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/lib/private/App/AppStore/Fetcher/CategoryFetcher.php b/lib/private/App/AppStore/Fetcher/CategoryFetcher.php
index d7857d41bee..60c0af82897 100644
--- a/lib/private/App/AppStore/Fetcher/CategoryFetcher.php
+++ b/lib/private/App/AppStore/Fetcher/CategoryFetcher.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/lib/private/App/AppStore/Version/Version.php b/lib/private/App/AppStore/Version/Version.php
index 2d169a291f1..5add30e84b5 100644
--- a/lib/private/App/AppStore/Version/Version.php
+++ b/lib/private/App/AppStore/Version/Version.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/lib/private/AppFramework/Http.php b/lib/private/AppFramework/Http.php
index ee5a4397952..6f5b3b96b71 100644
--- a/lib/private/AppFramework/Http.php
+++ b/lib/private/AppFramework/Http.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/lib/private/AppFramework/Middleware/PublicShare/Exceptions/NeedAuthenticationException.php b/lib/private/AppFramework/Middleware/PublicShare/Exceptions/NeedAuthenticationException.php
index 5df4009b094..002364aa9a2 100644
--- a/lib/private/AppFramework/Middleware/PublicShare/Exceptions/NeedAuthenticationException.php
+++ b/lib/private/AppFramework/Middleware/PublicShare/Exceptions/NeedAuthenticationException.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/lib/private/AppFramework/Middleware/Security/Exceptions/AppNotEnabledException.php b/lib/private/AppFramework/Middleware/Security/Exceptions/AppNotEnabledException.php
index 53fbaaf5ed2..f59e4ab4968 100644
--- a/lib/private/AppFramework/Middleware/Security/Exceptions/AppNotEnabledException.php
+++ b/lib/private/AppFramework/Middleware/Security/Exceptions/AppNotEnabledException.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/lib/private/AppFramework/Middleware/Security/Exceptions/CrossSiteRequestForgeryException.php b/lib/private/AppFramework/Middleware/Security/Exceptions/CrossSiteRequestForgeryException.php
index 0c6a28134ca..a29e3961bfe 100644
--- a/lib/private/AppFramework/Middleware/Security/Exceptions/CrossSiteRequestForgeryException.php
+++ b/lib/private/AppFramework/Middleware/Security/Exceptions/CrossSiteRequestForgeryException.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/lib/private/AppFramework/Middleware/Security/Exceptions/ExAppRequiredException.php b/lib/private/AppFramework/Middleware/Security/Exceptions/ExAppRequiredException.php
index 77bc7efebac..f0d79ef593a 100644
--- a/lib/private/AppFramework/Middleware/Security/Exceptions/ExAppRequiredException.php
+++ b/lib/private/AppFramework/Middleware/Security/Exceptions/ExAppRequiredException.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/lib/private/AppFramework/Middleware/Security/Exceptions/LaxSameSiteCookieFailedException.php b/lib/private/AppFramework/Middleware/Security/Exceptions/LaxSameSiteCookieFailedException.php
index 0380c6781aa..c446d6a220b 100644
--- a/lib/private/AppFramework/Middleware/Security/Exceptions/LaxSameSiteCookieFailedException.php
+++ b/lib/private/AppFramework/Middleware/Security/Exceptions/LaxSameSiteCookieFailedException.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2017 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/lib/private/AppFramework/Middleware/Security/Exceptions/NotConfirmedException.php b/lib/private/AppFramework/Middleware/Security/Exceptions/NotConfirmedException.php
index ca30f736fbc..854189f1b6b 100644
--- a/lib/private/AppFramework/Middleware/Security/Exceptions/NotConfirmedException.php
+++ b/lib/private/AppFramework/Middleware/Security/Exceptions/NotConfirmedException.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/lib/private/AppFramework/Middleware/Security/Exceptions/NotLoggedInException.php b/lib/private/AppFramework/Middleware/Security/Exceptions/NotLoggedInException.php
index e5a7853a64b..d2c52534420 100644
--- a/lib/private/AppFramework/Middleware/Security/Exceptions/NotLoggedInException.php
+++ b/lib/private/AppFramework/Middleware/Security/Exceptions/NotLoggedInException.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/lib/private/AppFramework/OCS/V1Response.php b/lib/private/AppFramework/OCS/V1Response.php
index 1c2c25f5cb0..710a16fddf5 100644
--- a/lib/private/AppFramework/OCS/V1Response.php
+++ b/lib/private/AppFramework/OCS/V1Response.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/lib/private/AppFramework/OCS/V2Response.php b/lib/private/AppFramework/OCS/V2Response.php
index efc9348eb37..1a2170a7124 100644
--- a/lib/private/AppFramework/OCS/V2Response.php
+++ b/lib/private/AppFramework/OCS/V2Response.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/lib/private/Archive/Archive.php b/lib/private/Archive/Archive.php
index 874087fb167..2887a341bbf 100644
--- a/lib/private/Archive/Archive.php
+++ b/lib/private/Archive/Archive.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/lib/private/Authentication/Exceptions/LoginRequiredException.php b/lib/private/Authentication/Exceptions/LoginRequiredException.php
index d18ec4f1fbf..53aa7e0a2ed 100644
--- a/lib/private/Authentication/Exceptions/LoginRequiredException.php
+++ b/lib/private/Authentication/Exceptions/LoginRequiredException.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/lib/private/Authentication/Exceptions/PasswordLoginForbiddenException.php b/lib/private/Authentication/Exceptions/PasswordLoginForbiddenException.php
index ec833a5a3d0..0326eede983 100644
--- a/lib/private/Authentication/Exceptions/PasswordLoginForbiddenException.php
+++ b/lib/private/Authentication/Exceptions/PasswordLoginForbiddenException.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/lib/private/Authentication/Exceptions/PasswordlessTokenException.php b/lib/private/Authentication/Exceptions/PasswordlessTokenException.php
index a11e9a5f8d5..a8d8181b5ae 100644
--- a/lib/private/Authentication/Exceptions/PasswordlessTokenException.php
+++ b/lib/private/Authentication/Exceptions/PasswordlessTokenException.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/lib/private/Authentication/Exceptions/TwoFactorAuthRequiredException.php b/lib/private/Authentication/Exceptions/TwoFactorAuthRequiredException.php
index 8873b2c9f85..d8366f3bb65 100644
--- a/lib/private/Authentication/Exceptions/TwoFactorAuthRequiredException.php
+++ b/lib/private/Authentication/Exceptions/TwoFactorAuthRequiredException.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/lib/private/Authentication/Exceptions/UserAlreadyLoggedInException.php b/lib/private/Authentication/Exceptions/UserAlreadyLoggedInException.php
index 257f59772fc..f8cec3d44a5 100644
--- a/lib/private/Authentication/Exceptions/UserAlreadyLoggedInException.php
+++ b/lib/private/Authentication/Exceptions/UserAlreadyLoggedInException.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/lib/private/Authentication/LoginCredentials/Credentials.php b/lib/private/Authentication/LoginCredentials/Credentials.php
index e230f58e918..99e7827743e 100644
--- a/lib/private/Authentication/LoginCredentials/Credentials.php
+++ b/lib/private/Authentication/LoginCredentials/Credentials.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/lib/private/Authentication/Token/TokenCleanupJob.php b/lib/private/Authentication/Token/TokenCleanupJob.php
index ee6abebc850..5834d40cb52 100644
--- a/lib/private/Authentication/Token/TokenCleanupJob.php
+++ b/lib/private/Authentication/Token/TokenCleanupJob.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2022 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-only
diff --git a/lib/private/Collaboration/Collaborators/MailByMailPlugin.php b/lib/private/Collaboration/Collaborators/MailByMailPlugin.php
index 53f90e33c57..5c4156c6e19 100644
--- a/lib/private/Collaboration/Collaborators/MailByMailPlugin.php
+++ b/lib/private/Collaboration/Collaborators/MailByMailPlugin.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2025 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/lib/private/Collaboration/Collaborators/UserByMailPlugin.php b/lib/private/Collaboration/Collaborators/UserByMailPlugin.php
index 44c1a95221c..6c1367cdba8 100644
--- a/lib/private/Collaboration/Collaborators/UserByMailPlugin.php
+++ b/lib/private/Collaboration/Collaborators/UserByMailPlugin.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2025 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/lib/private/Color.php b/lib/private/Color.php
index 8e5cfb56c83..7b802489198 100644
--- a/lib/private/Color.php
+++ b/lib/private/Color.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/lib/private/Comments/ManagerFactory.php b/lib/private/Comments/ManagerFactory.php
index ec30fb00d3f..d377bf58696 100644
--- a/lib/private/Comments/ManagerFactory.php
+++ b/lib/private/Comments/ManagerFactory.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/lib/private/Contacts/ContactsMenu/Actions/LinkAction.php b/lib/private/Contacts/ContactsMenu/Actions/LinkAction.php
index cdaf9308bfc..020d13996eb 100644
--- a/lib/private/Contacts/ContactsMenu/Actions/LinkAction.php
+++ b/lib/private/Contacts/ContactsMenu/Actions/LinkAction.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2017 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/lib/private/DB/OCSqlitePlatform.php b/lib/private/DB/OCSqlitePlatform.php
index 3e2b10e6e40..d46aa694665 100644
--- a/lib/private/DB/OCSqlitePlatform.php
+++ b/lib/private/DB/OCSqlitePlatform.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/lib/private/DB/QueryBuilder/CompositeExpression.php b/lib/private/DB/QueryBuilder/CompositeExpression.php
index c0da96fb3af..18adf242c89 100644
--- a/lib/private/DB/QueryBuilder/CompositeExpression.php
+++ b/lib/private/DB/QueryBuilder/CompositeExpression.php
@@ -1,11 +1,12 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
  * SPDX-License-Identifier: AGPL-3.0-only
  */
-
 namespace OC\DB\QueryBuilder;
 
 use OCP\DB\QueryBuilder\ICompositeExpression;
diff --git a/lib/private/DB/QueryBuilder/Literal.php b/lib/private/DB/QueryBuilder/Literal.php
index 8cdb071b52b..438883b077f 100644
--- a/lib/private/DB/QueryBuilder/Literal.php
+++ b/lib/private/DB/QueryBuilder/Literal.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/lib/private/DB/QueryBuilder/Parameter.php b/lib/private/DB/QueryBuilder/Parameter.php
index 11732c973fc..fa7b7dbd0a6 100644
--- a/lib/private/DB/QueryBuilder/Parameter.php
+++ b/lib/private/DB/QueryBuilder/Parameter.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/lib/private/DB/QueryBuilder/QueryFunction.php b/lib/private/DB/QueryBuilder/QueryFunction.php
index 6a91127f5d2..fa456836a40 100644
--- a/lib/private/DB/QueryBuilder/QueryFunction.php
+++ b/lib/private/DB/QueryBuilder/QueryFunction.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/lib/private/DB/SQLiteMigrator.php b/lib/private/DB/SQLiteMigrator.php
index 40503ae1781..160a0d6ccd7 100644
--- a/lib/private/DB/SQLiteMigrator.php
+++ b/lib/private/DB/SQLiteMigrator.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/lib/private/DatabaseException.php b/lib/private/DatabaseException.php
index c0bb3eb7171..70190d88bd2 100644
--- a/lib/private/DatabaseException.php
+++ b/lib/private/DatabaseException.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/lib/private/DatabaseSetupException.php b/lib/private/DatabaseSetupException.php
index 2e99eafa4ad..03f769b3c74 100644
--- a/lib/private/DatabaseSetupException.php
+++ b/lib/private/DatabaseSetupException.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/lib/private/Encryption/Exceptions/DecryptionFailedException.php b/lib/private/Encryption/Exceptions/DecryptionFailedException.php
index bdda5b381b6..126aec13709 100644
--- a/lib/private/Encryption/Exceptions/DecryptionFailedException.php
+++ b/lib/private/Encryption/Exceptions/DecryptionFailedException.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/lib/private/Encryption/Exceptions/EmptyEncryptionDataException.php b/lib/private/Encryption/Exceptions/EmptyEncryptionDataException.php
index a2829a8c09c..12d0b2ee047 100644
--- a/lib/private/Encryption/Exceptions/EmptyEncryptionDataException.php
+++ b/lib/private/Encryption/Exceptions/EmptyEncryptionDataException.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/lib/private/Encryption/Exceptions/EncryptionFailedException.php b/lib/private/Encryption/Exceptions/EncryptionFailedException.php
index 04ca6eba79c..fc95f70ea7d 100644
--- a/lib/private/Encryption/Exceptions/EncryptionFailedException.php
+++ b/lib/private/Encryption/Exceptions/EncryptionFailedException.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/lib/private/Encryption/Exceptions/EncryptionHeaderKeyExistsException.php b/lib/private/Encryption/Exceptions/EncryptionHeaderKeyExistsException.php
index 52f488e2956..c6136bc0255 100644
--- a/lib/private/Encryption/Exceptions/EncryptionHeaderKeyExistsException.php
+++ b/lib/private/Encryption/Exceptions/EncryptionHeaderKeyExistsException.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/lib/private/Encryption/Exceptions/EncryptionHeaderToLargeException.php b/lib/private/Encryption/Exceptions/EncryptionHeaderToLargeException.php
index dace9527305..f31adb757e1 100644
--- a/lib/private/Encryption/Exceptions/EncryptionHeaderToLargeException.php
+++ b/lib/private/Encryption/Exceptions/EncryptionHeaderToLargeException.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/lib/private/Encryption/Exceptions/ModuleAlreadyExistsException.php b/lib/private/Encryption/Exceptions/ModuleAlreadyExistsException.php
index 72ff00befc3..0d2350ca5dc 100644
--- a/lib/private/Encryption/Exceptions/ModuleAlreadyExistsException.php
+++ b/lib/private/Encryption/Exceptions/ModuleAlreadyExistsException.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/lib/private/Encryption/Exceptions/ModuleDoesNotExistsException.php b/lib/private/Encryption/Exceptions/ModuleDoesNotExistsException.php
index 8ec382f176d..6b4db0dbc77 100644
--- a/lib/private/Encryption/Exceptions/ModuleDoesNotExistsException.php
+++ b/lib/private/Encryption/Exceptions/ModuleDoesNotExistsException.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/lib/private/Encryption/Exceptions/UnknownCipherException.php b/lib/private/Encryption/Exceptions/UnknownCipherException.php
index a64a413bf8e..b70f008b9f0 100644
--- a/lib/private/Encryption/Exceptions/UnknownCipherException.php
+++ b/lib/private/Encryption/Exceptions/UnknownCipherException.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/lib/private/Federation/CloudFederationNotification.php b/lib/private/Federation/CloudFederationNotification.php
index d8f6d87f3e2..e0694c184af 100644
--- a/lib/private/Federation/CloudFederationNotification.php
+++ b/lib/private/Federation/CloudFederationNotification.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2018 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/lib/private/Files/Cache/CacheDependencies.php b/lib/private/Files/Cache/CacheDependencies.php
index 61d2a2f9646..a115dcfbdba 100644
--- a/lib/private/Files/Cache/CacheDependencies.php
+++ b/lib/private/Files/Cache/CacheDependencies.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2023 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/lib/private/Files/Cache/FailedCache.php b/lib/private/Files/Cache/FailedCache.php
index 83fb239ecb6..ce4d1a5eefb 100644
--- a/lib/private/Files/Cache/FailedCache.php
+++ b/lib/private/Files/Cache/FailedCache.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/lib/private/Files/Cache/Wrapper/CachePermissionsMask.php b/lib/private/Files/Cache/Wrapper/CachePermissionsMask.php
index c2ecaaeaf07..905b418cdf4 100644
--- a/lib/private/Files/Cache/Wrapper/CachePermissionsMask.php
+++ b/lib/private/Files/Cache/Wrapper/CachePermissionsMask.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/lib/private/Files/Config/CachedMountFileInfo.php b/lib/private/Files/Config/CachedMountFileInfo.php
index 1ea77a53e5f..ae27b1e762d 100644
--- a/lib/private/Files/Config/CachedMountFileInfo.php
+++ b/lib/private/Files/Config/CachedMountFileInfo.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2017 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/lib/private/Files/Config/UserMountCacheListener.php b/lib/private/Files/Config/UserMountCacheListener.php
index 2b1eecde971..6df2d08de77 100644
--- a/lib/private/Files/Config/UserMountCacheListener.php
+++ b/lib/private/Files/Config/UserMountCacheListener.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/lib/private/Files/Mount/CacheMountProvider.php b/lib/private/Files/Mount/CacheMountProvider.php
index 5f511701a5e..b05f2aaee31 100644
--- a/lib/private/Files/Mount/CacheMountProvider.php
+++ b/lib/private/Files/Mount/CacheMountProvider.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/lib/private/Files/Mount/LocalHomeMountProvider.php b/lib/private/Files/Mount/LocalHomeMountProvider.php
index efd4e63831c..92b44eac151 100644
--- a/lib/private/Files/Mount/LocalHomeMountProvider.php
+++ b/lib/private/Files/Mount/LocalHomeMountProvider.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/lib/private/Files/Mount/MoveableMount.php b/lib/private/Files/Mount/MoveableMount.php
index 755733bf651..da1b50d2ee9 100644
--- a/lib/private/Files/Mount/MoveableMount.php
+++ b/lib/private/Files/Mount/MoveableMount.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/lib/private/Files/Notify/Change.php b/lib/private/Files/Notify/Change.php
index 6a94673987d..445b978746a 100644
--- a/lib/private/Files/Notify/Change.php
+++ b/lib/private/Files/Notify/Change.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2017 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/lib/private/Files/Search/SearchBinaryOperator.php b/lib/private/Files/Search/SearchBinaryOperator.php
index 3424a044179..ba8caa10cb8 100644
--- a/lib/private/Files/Search/SearchBinaryOperator.php
+++ b/lib/private/Files/Search/SearchBinaryOperator.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2017 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/lib/private/Files/Search/SearchOrder.php b/lib/private/Files/Search/SearchOrder.php
index 5a036653f4e..345ca360af1 100644
--- a/lib/private/Files/Search/SearchOrder.php
+++ b/lib/private/Files/Search/SearchOrder.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2017 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/lib/private/Files/Search/SearchQuery.php b/lib/private/Files/Search/SearchQuery.php
index 9c1d7c5df78..1c38c1ef162 100644
--- a/lib/private/Files/Search/SearchQuery.php
+++ b/lib/private/Files/Search/SearchQuery.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2017 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/lib/private/Files/Storage/CommonTest.php b/lib/private/Files/Storage/CommonTest.php
index 4bca8f90a38..b1a939cc00b 100644
--- a/lib/private/Files/Storage/CommonTest.php
+++ b/lib/private/Files/Storage/CommonTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/lib/private/Files/Storage/Storage.php b/lib/private/Files/Storage/Storage.php
index aa17c12b309..e2beb5a8ac9 100644
--- a/lib/private/Files/Storage/Storage.php
+++ b/lib/private/Files/Storage/Storage.php
@@ -1,11 +1,12 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
  * SPDX-License-Identifier: AGPL-3.0-only
  */
-
 namespace OC\Files\Storage;
 
 use OCP\Files\Cache\ICache;
diff --git a/lib/private/ForbiddenException.php b/lib/private/ForbiddenException.php
index e65576d27ad..c03c27e59e8 100644
--- a/lib/private/ForbiddenException.php
+++ b/lib/private/ForbiddenException.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/lib/private/GlobalScale/Config.php b/lib/private/GlobalScale/Config.php
index 76753f78162..4319a2fbb42 100644
--- a/lib/private/GlobalScale/Config.php
+++ b/lib/private/GlobalScale/Config.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2017 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/lib/private/Hooks/BasicEmitter.php b/lib/private/Hooks/BasicEmitter.php
index 091334b71c8..775a7d47a8c 100644
--- a/lib/private/Hooks/BasicEmitter.php
+++ b/lib/private/Hooks/BasicEmitter.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/lib/private/Hooks/Emitter.php b/lib/private/Hooks/Emitter.php
index 86eb410860c..b8c00a211fe 100644
--- a/lib/private/Hooks/Emitter.php
+++ b/lib/private/Hooks/Emitter.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/lib/private/IntegrityCheck/Exceptions/InvalidSignatureException.php b/lib/private/IntegrityCheck/Exceptions/InvalidSignatureException.php
index 25f8b0dcbf7..68038c2d0d2 100644
--- a/lib/private/IntegrityCheck/Exceptions/InvalidSignatureException.php
+++ b/lib/private/IntegrityCheck/Exceptions/InvalidSignatureException.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/lib/private/L10N/LanguageNotFoundException.php b/lib/private/L10N/LanguageNotFoundException.php
index 087a384e00e..42053e70831 100644
--- a/lib/private/L10N/LanguageNotFoundException.php
+++ b/lib/private/L10N/LanguageNotFoundException.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/lib/private/Lockdown/Filesystem/NullCache.php b/lib/private/Lockdown/Filesystem/NullCache.php
index dde483d7225..41e76bc0d97 100644
--- a/lib/private/Lockdown/Filesystem/NullCache.php
+++ b/lib/private/Lockdown/Filesystem/NullCache.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/lib/private/Memcache/NullCache.php b/lib/private/Memcache/NullCache.php
index 11c17309b87..0fc66db82f8 100644
--- a/lib/private/Memcache/NullCache.php
+++ b/lib/private/Memcache/NullCache.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/lib/private/Migration/NullOutput.php b/lib/private/Migration/NullOutput.php
index 8db7b950af8..f099d515c77 100644
--- a/lib/private/Migration/NullOutput.php
+++ b/lib/private/Migration/NullOutput.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-only
diff --git a/lib/private/NeedsUpdateException.php b/lib/private/NeedsUpdateException.php
index da467d96299..cae8dc0047a 100644
--- a/lib/private/NeedsUpdateException.php
+++ b/lib/private/NeedsUpdateException.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/lib/private/NotSquareException.php b/lib/private/NotSquareException.php
index 7be7ad09521..2fb5e3dc6cf 100644
--- a/lib/private/NotSquareException.php
+++ b/lib/private/NotSquareException.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/lib/private/OCS/CoreCapabilities.php b/lib/private/OCS/CoreCapabilities.php
index 3d988a8662e..2729cc738f4 100644
--- a/lib/private/OCS/CoreCapabilities.php
+++ b/lib/private/OCS/CoreCapabilities.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/lib/private/Preview/BMP.php b/lib/private/Preview/BMP.php
index f275aecf0cf..b4d4d5829cb 100644
--- a/lib/private/Preview/BMP.php
+++ b/lib/private/Preview/BMP.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/lib/private/Preview/Font.php b/lib/private/Preview/Font.php
index 79e537f6ffb..85f5d1f78d1 100644
--- a/lib/private/Preview/Font.php
+++ b/lib/private/Preview/Font.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/lib/private/Preview/GIF.php b/lib/private/Preview/GIF.php
index 941ef68648a..be54bf8659c 100644
--- a/lib/private/Preview/GIF.php
+++ b/lib/private/Preview/GIF.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/lib/private/Preview/Illustrator.php b/lib/private/Preview/Illustrator.php
index bff556a3177..937da1d9f87 100644
--- a/lib/private/Preview/Illustrator.php
+++ b/lib/private/Preview/Illustrator.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/lib/private/Preview/ImaginaryPDF.php b/lib/private/Preview/ImaginaryPDF.php
index d26c6d1b7ff..2786700f5a7 100644
--- a/lib/private/Preview/ImaginaryPDF.php
+++ b/lib/private/Preview/ImaginaryPDF.php
@@ -1,10 +1,11 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2020 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
  */
-
 namespace OC\Preview;
 
 class ImaginaryPDF extends Imaginary {
diff --git a/lib/private/Preview/JPEG.php b/lib/private/Preview/JPEG.php
index a1a394f81c9..97a6a0c94c1 100644
--- a/lib/private/Preview/JPEG.php
+++ b/lib/private/Preview/JPEG.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/lib/private/Preview/Krita.php b/lib/private/Preview/Krita.php
index e96fac993aa..8654698c125 100644
--- a/lib/private/Preview/Krita.php
+++ b/lib/private/Preview/Krita.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2020 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/lib/private/Preview/MSOffice2003.php b/lib/private/Preview/MSOffice2003.php
index a52e618d484..977ebf467bf 100644
--- a/lib/private/Preview/MSOffice2003.php
+++ b/lib/private/Preview/MSOffice2003.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/lib/private/Preview/MSOffice2007.php b/lib/private/Preview/MSOffice2007.php
index 317f2dcc7f1..6ccf70be0c2 100644
--- a/lib/private/Preview/MSOffice2007.php
+++ b/lib/private/Preview/MSOffice2007.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/lib/private/Preview/MSOfficeDoc.php b/lib/private/Preview/MSOfficeDoc.php
index 2e1044395f1..479e9170689 100644
--- a/lib/private/Preview/MSOfficeDoc.php
+++ b/lib/private/Preview/MSOfficeDoc.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/lib/private/Preview/OpenDocument.php b/lib/private/Preview/OpenDocument.php
index f590eb6a59c..8eea9fecce7 100644
--- a/lib/private/Preview/OpenDocument.php
+++ b/lib/private/Preview/OpenDocument.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/lib/private/Preview/PDF.php b/lib/private/Preview/PDF.php
index 9de14685925..dc8b37079b3 100644
--- a/lib/private/Preview/PDF.php
+++ b/lib/private/Preview/PDF.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/lib/private/Preview/PNG.php b/lib/private/Preview/PNG.php
index 49d0cd059ba..5e2750c4f14 100644
--- a/lib/private/Preview/PNG.php
+++ b/lib/private/Preview/PNG.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/lib/private/Preview/Photoshop.php b/lib/private/Preview/Photoshop.php
index b7209120530..dcb893626c8 100644
--- a/lib/private/Preview/Photoshop.php
+++ b/lib/private/Preview/Photoshop.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/lib/private/Preview/Postscript.php b/lib/private/Preview/Postscript.php
index 68588647db4..b03db86e5f8 100644
--- a/lib/private/Preview/Postscript.php
+++ b/lib/private/Preview/Postscript.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/lib/private/Preview/SGI.php b/lib/private/Preview/SGI.php
index 78b1ea5828a..64e1ed2863d 100644
--- a/lib/private/Preview/SGI.php
+++ b/lib/private/Preview/SGI.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2021 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/lib/private/Preview/StarOffice.php b/lib/private/Preview/StarOffice.php
index 9ea540dc912..e2d2b10dfce 100644
--- a/lib/private/Preview/StarOffice.php
+++ b/lib/private/Preview/StarOffice.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/lib/private/Preview/TGA.php b/lib/private/Preview/TGA.php
index 675907b4e49..24e55a09d90 100644
--- a/lib/private/Preview/TGA.php
+++ b/lib/private/Preview/TGA.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2021 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/lib/private/Preview/TIFF.php b/lib/private/Preview/TIFF.php
index cd81e611d0b..866e26cc3d8 100644
--- a/lib/private/Preview/TIFF.php
+++ b/lib/private/Preview/TIFF.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/lib/private/Preview/XBitmap.php b/lib/private/Preview/XBitmap.php
index c8337cc252d..95ea589835a 100644
--- a/lib/private/Preview/XBitmap.php
+++ b/lib/private/Preview/XBitmap.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/lib/private/PreviewNotAvailableException.php b/lib/private/PreviewNotAvailableException.php
index 582f337acd1..3cc4b17f4ac 100644
--- a/lib/private/PreviewNotAvailableException.php
+++ b/lib/private/PreviewNotAvailableException.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/lib/private/Remote/Api/ApiCollection.php b/lib/private/Remote/Api/ApiCollection.php
index a846eea0848..b42c7c484ba 100644
--- a/lib/private/Remote/Api/ApiCollection.php
+++ b/lib/private/Remote/Api/ApiCollection.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2017 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/lib/private/Remote/Api/ApiFactory.php b/lib/private/Remote/Api/ApiFactory.php
index f225ab16894..8c908a2f91f 100644
--- a/lib/private/Remote/Api/ApiFactory.php
+++ b/lib/private/Remote/Api/ApiFactory.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2017 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/lib/private/Remote/Api/NotFoundException.php b/lib/private/Remote/Api/NotFoundException.php
index 361d03d24ed..e4dc514c366 100644
--- a/lib/private/Remote/Api/NotFoundException.php
+++ b/lib/private/Remote/Api/NotFoundException.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2017 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/lib/private/Remote/Credentials.php b/lib/private/Remote/Credentials.php
index 763e420c8c9..607c403b4bf 100644
--- a/lib/private/Remote/Credentials.php
+++ b/lib/private/Remote/Credentials.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2017 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/lib/private/Remote/User.php b/lib/private/Remote/User.php
index 18a4d8b30b8..a8f665154ad 100644
--- a/lib/private/Remote/User.php
+++ b/lib/private/Remote/User.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2017 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/lib/private/Repair/AddCleanupUpdaterBackupsJob.php b/lib/private/Repair/AddCleanupUpdaterBackupsJob.php
index 55d703422ff..731bf4537c7 100644
--- a/lib/private/Repair/AddCleanupUpdaterBackupsJob.php
+++ b/lib/private/Repair/AddCleanupUpdaterBackupsJob.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2018 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/lib/private/Repair/AddMetadataGenerationJob.php b/lib/private/Repair/AddMetadataGenerationJob.php
index ad5fb129ab1..f907144dc7d 100644
--- a/lib/private/Repair/AddMetadataGenerationJob.php
+++ b/lib/private/Repair/AddMetadataGenerationJob.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2023 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/lib/private/Repair/AddMovePreviewJob.php b/lib/private/Repair/AddMovePreviewJob.php
index 1fe265fa1b6..84d32887f28 100644
--- a/lib/private/Repair/AddMovePreviewJob.php
+++ b/lib/private/Repair/AddMovePreviewJob.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2023 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/lib/private/Repair/ClearFrontendCaches.php b/lib/private/Repair/ClearFrontendCaches.php
index 60be83efe63..b5631b660cb 100644
--- a/lib/private/Repair/ClearFrontendCaches.php
+++ b/lib/private/Repair/ClearFrontendCaches.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2018 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/lib/private/Repair/ClearGeneratedAvatarCache.php b/lib/private/Repair/ClearGeneratedAvatarCache.php
index d48683dfb1e..cc71a5dc6e4 100644
--- a/lib/private/Repair/ClearGeneratedAvatarCache.php
+++ b/lib/private/Repair/ClearGeneratedAvatarCache.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2018 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/lib/private/Repair/ClearGeneratedAvatarCacheJob.php b/lib/private/Repair/ClearGeneratedAvatarCacheJob.php
index ff6a67480cd..6637becd4a1 100644
--- a/lib/private/Repair/ClearGeneratedAvatarCacheJob.php
+++ b/lib/private/Repair/ClearGeneratedAvatarCacheJob.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2022 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/lib/private/Repair/Collation.php b/lib/private/Repair/Collation.php
index 346a5abc815..450b132ef47 100644
--- a/lib/private/Repair/Collation.php
+++ b/lib/private/Repair/Collation.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/lib/private/Repair/MoveUpdaterStepFile.php b/lib/private/Repair/MoveUpdaterStepFile.php
index 7155eed5689..28fe0db1314 100644
--- a/lib/private/Repair/MoveUpdaterStepFile.php
+++ b/lib/private/Repair/MoveUpdaterStepFile.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/lib/private/Repair/NC13/AddLogRotateJob.php b/lib/private/Repair/NC13/AddLogRotateJob.php
index 7ad9b3445b3..a44610dd07a 100644
--- a/lib/private/Repair/NC13/AddLogRotateJob.php
+++ b/lib/private/Repair/NC13/AddLogRotateJob.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2017 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/lib/private/Repair/NC21/AddCheckForUserCertificatesJob.php b/lib/private/Repair/NC21/AddCheckForUserCertificatesJob.php
index e55dce7814d..1890df81cf1 100644
--- a/lib/private/Repair/NC21/AddCheckForUserCertificatesJob.php
+++ b/lib/private/Repair/NC21/AddCheckForUserCertificatesJob.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2020 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/lib/private/Repair/Owncloud/DropAccountTermsTable.php b/lib/private/Repair/Owncloud/DropAccountTermsTable.php
index 2420327a037..f848a99af57 100644
--- a/lib/private/Repair/Owncloud/DropAccountTermsTable.php
+++ b/lib/private/Repair/Owncloud/DropAccountTermsTable.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2017 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/lib/private/Repair/Owncloud/MoveAvatars.php b/lib/private/Repair/Owncloud/MoveAvatars.php
index f4ee9d751f2..fd38fc79d64 100644
--- a/lib/private/Repair/Owncloud/MoveAvatars.php
+++ b/lib/private/Repair/Owncloud/MoveAvatars.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/lib/private/RepairException.php b/lib/private/RepairException.php
index bd6d4600bfb..9f57c2fabeb 100644
--- a/lib/private/RepairException.php
+++ b/lib/private/RepairException.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/lib/private/ServerNotAvailableException.php b/lib/private/ServerNotAvailableException.php
index d24f16f30a0..979032938aa 100644
--- a/lib/private/ServerNotAvailableException.php
+++ b/lib/private/ServerNotAvailableException.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/lib/private/ServiceUnavailableException.php b/lib/private/ServiceUnavailableException.php
index f0fe3b48dbe..f73f8bbc80a 100644
--- a/lib/private/ServiceUnavailableException.php
+++ b/lib/private/ServiceUnavailableException.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/lib/private/Settings/AuthorizedGroup.php b/lib/private/Settings/AuthorizedGroup.php
index a6039a66530..6949c0649aa 100644
--- a/lib/private/Settings/AuthorizedGroup.php
+++ b/lib/private/Settings/AuthorizedGroup.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2021 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/lib/private/Settings/Section.php b/lib/private/Settings/Section.php
index c67c4c07708..8fb30165bcf 100644
--- a/lib/private/Settings/Section.php
+++ b/lib/private/Settings/Section.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/lib/private/Share/Constants.php b/lib/private/Share/Constants.php
index c55caee6f0a..c816807f280 100644
--- a/lib/private/Share/Constants.php
+++ b/lib/private/Share/Constants.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/lib/private/Share20/Exception/BackendError.php b/lib/private/Share20/Exception/BackendError.php
index b2585367727..056629ee677 100644
--- a/lib/private/Share20/Exception/BackendError.php
+++ b/lib/private/Share20/Exception/BackendError.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/lib/private/Share20/Exception/InvalidShare.php b/lib/private/Share20/Exception/InvalidShare.php
index 8756455f9d2..eba781fa934 100644
--- a/lib/private/Share20/Exception/InvalidShare.php
+++ b/lib/private/Share20/Exception/InvalidShare.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/lib/private/Share20/Exception/ProviderException.php b/lib/private/Share20/Exception/ProviderException.php
index cb79ab884b4..1c2dcae89aa 100644
--- a/lib/private/Share20/Exception/ProviderException.php
+++ b/lib/private/Share20/Exception/ProviderException.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/lib/private/StreamImage.php b/lib/private/StreamImage.php
index 00f14212c57..f4c444a2f0d 100644
--- a/lib/private/StreamImage.php
+++ b/lib/private/StreamImage.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2021 Nextcloud GmbH and Nextcloud contributors
diff --git a/lib/private/TaskProcessing/RemoveOldTasksBackgroundJob.php b/lib/private/TaskProcessing/RemoveOldTasksBackgroundJob.php
index 48a2cd256a8..1d10450e7bc 100644
--- a/lib/private/TaskProcessing/RemoveOldTasksBackgroundJob.php
+++ b/lib/private/TaskProcessing/RemoveOldTasksBackgroundJob.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/lib/private/User/DisabledUserException.php b/lib/private/User/DisabledUserException.php
index db8a23d2027..a126fee40d3 100644
--- a/lib/private/User/DisabledUserException.php
+++ b/lib/private/User/DisabledUserException.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2025 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-only
diff --git a/lib/private/User/LoginException.php b/lib/private/User/LoginException.php
index 6f0e98513dd..e94b3b79b0e 100644
--- a/lib/private/User/LoginException.php
+++ b/lib/private/User/LoginException.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/lib/private/User/NoUserException.php b/lib/private/User/NoUserException.php
index c0a5c51b08d..3df46821184 100644
--- a/lib/private/User/NoUserException.php
+++ b/lib/private/User/NoUserException.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/ocs/v2.php b/ocs/v2.php
index c83d3c1b0d2..d2cc9cb6185 100644
--- a/ocs/v2.php
+++ b/ocs/v2.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/tests/databases-all-config.php b/tests/databases-all-config.php
index 210e75d3ab9..dd466610e25 100644
--- a/tests/databases-all-config.php
+++ b/tests/databases-all-config.php
@@ -1,10 +1,11 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2025 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
  */
-
 $CONFIG = [
 	'supportedDatabases' => [
 		'sqlite',
diff --git a/tests/lib/Comments/FakeManager.php b/tests/lib/Comments/FakeManager.php
index 518e4801d0b..eadaee13054 100644
--- a/tests/lib/Comments/FakeManager.php
+++ b/tests/lib/Comments/FakeManager.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/tests/lib/Files/Cache/MoveFromCacheTraitTest.php b/tests/lib/Files/Cache/MoveFromCacheTraitTest.php
index c7e20f55fbe..c929ac7ab67 100644
--- a/tests/lib/Files/Cache/MoveFromCacheTraitTest.php
+++ b/tests/lib/Files/Cache/MoveFromCacheTraitTest.php
@@ -1,11 +1,12 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2019-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
  * SPDX-License-Identifier: AGPL-3.0-or-later
  */
-
 namespace Test\Files\Cache;
 
 use OC\Files\Cache\Cache;
diff --git a/tests/lib/Files/ObjectStore/LocalTest.php b/tests/lib/Files/ObjectStore/LocalTest.php
index d3e9ad56164..f66114966a0 100644
--- a/tests/lib/Files/ObjectStore/LocalTest.php
+++ b/tests/lib/Files/ObjectStore/LocalTest.php
@@ -1,10 +1,11 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
  */
-
 namespace Test\Files\ObjectStore;
 
 use OC\Files\ObjectStore\StorageObjectStore;
diff --git a/tests/lib/Files/ObjectStore/ObjectStoreStoragesDifferentBucketTest.php b/tests/lib/Files/ObjectStore/ObjectStoreStoragesDifferentBucketTest.php
index d84df898a12..37cb8f47f2f 100644
--- a/tests/lib/Files/ObjectStore/ObjectStoreStoragesDifferentBucketTest.php
+++ b/tests/lib/Files/ObjectStore/ObjectStoreStoragesDifferentBucketTest.php
@@ -1,11 +1,12 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
  * SPDX-License-Identifier: AGPL-3.0-or-later
  */
-
 namespace Test\Files\ObjectStore;
 
 use OC\Files\ObjectStore\StorageObjectStore;
diff --git a/tests/lib/Files/ObjectStore/ObjectStoreStoragesSameBucketTest.php b/tests/lib/Files/ObjectStore/ObjectStoreStoragesSameBucketTest.php
index 5779c0c4336..b1a8de10716 100644
--- a/tests/lib/Files/ObjectStore/ObjectStoreStoragesSameBucketTest.php
+++ b/tests/lib/Files/ObjectStore/ObjectStoreStoragesSameBucketTest.php
@@ -1,11 +1,12 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
  * SPDX-License-Identifier: AGPL-3.0-or-later
  */
-
 namespace Test\Files\ObjectStore;
 
 use OC\Files\ObjectStore\StorageObjectStore;
diff --git a/tests/lib/Files/Storage/CopyDirectoryTest.php b/tests/lib/Files/Storage/CopyDirectoryTest.php
index 141f6532a3d..f542cc20e4a 100644
--- a/tests/lib/Files/Storage/CopyDirectoryTest.php
+++ b/tests/lib/Files/Storage/CopyDirectoryTest.php
@@ -1,11 +1,12 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2019-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
  * SPDX-License-Identifier: AGPL-3.0-only
  */
-
 namespace Test\Files\Storage;
 
 use OC\Files\Storage\PolyFill\CopyDirectory;
diff --git a/tests/lib/Files/Stream/DummyEncryptionWrapper.php b/tests/lib/Files/Stream/DummyEncryptionWrapper.php
index 89904e6de73..694ac3a2503 100644
--- a/tests/lib/Files/Stream/DummyEncryptionWrapper.php
+++ b/tests/lib/Files/Stream/DummyEncryptionWrapper.php
@@ -1,11 +1,12 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2019-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
  * SPDX-License-Identifier: AGPL-3.0-only
  */
-
 namespace Test\Files\Stream;
 
 use OC\Files\Stream\Encryption;
diff --git a/tests/lib/HookHelper.php b/tests/lib/HookHelper.php
index 19eca59ac80..321d69aa996 100644
--- a/tests/lib/HookHelper.php
+++ b/tests/lib/HookHelper.php
@@ -1,11 +1,12 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
  * SPDX-License-Identifier: AGPL-3.0-or-later
  */
-
 namespace Test;
 
 use OC\Files\Filesystem;
diff --git a/tests/lib/Memcache/ArrayCacheTest.php b/tests/lib/Memcache/ArrayCacheTest.php
index 2e27994d128..d652b51480c 100644
--- a/tests/lib/Memcache/ArrayCacheTest.php
+++ b/tests/lib/Memcache/ArrayCacheTest.php
@@ -1,11 +1,12 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
  * SPDX-License-Identifier: AGPL-3.0-or-later
  */
-
 namespace Test\Memcache;
 
 use OC\Memcache\ArrayCache;
diff --git a/tests/lib/Memcache/CasTraitTestClass.php b/tests/lib/Memcache/CasTraitTestClass.php
index f3dbd863b40..b4c49c7886d 100644
--- a/tests/lib/Memcache/CasTraitTestClass.php
+++ b/tests/lib/Memcache/CasTraitTestClass.php
@@ -1,10 +1,11 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2025 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
  */
-
 namespace Test\Memcache;
 
 use OC\Memcache\CASTrait;
diff --git a/tests/lib/User/AvatarUserDummy.php b/tests/lib/User/AvatarUserDummy.php
index 001dabd24c6..77ca868da4b 100644
--- a/tests/lib/User/AvatarUserDummy.php
+++ b/tests/lib/User/AvatarUserDummy.php
@@ -1,11 +1,12 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2020-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
  * SPDX-License-Identifier: AGPL-3.0-or-later
  */
-
 namespace Test\User;
 
 class AvatarUserDummy extends \Test\Util\User\Dummy {
diff --git a/tests/preseed-config.php b/tests/preseed-config.php
index f24c2a23ce1..1fc98a4226a 100644
--- a/tests/preseed-config.php
+++ b/tests/preseed-config.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2012-2016 ownCloud, Inc.
diff --git a/tests/redis-cluster.config.php b/tests/redis-cluster.config.php
index f749ebc81dc..cbcdefc0f23 100644
--- a/tests/redis-cluster.config.php
+++ b/tests/redis-cluster.config.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2017 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/tests/redis.config.php b/tests/redis.config.php
index dd135345abd..7986b817739 100644
--- a/tests/redis.config.php
+++ b/tests/redis.config.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2017 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/version.php b/version.php
index 598aa0fb508..e9b4ce3677d 100644
--- a/version.php
+++ b/version.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.