diff --git a/apps/dav/lib/Connector/Sabre/TagsPlugin.php b/apps/dav/lib/Connector/Sabre/TagsPlugin.php
index 8fd74a68b1f..83b51a3951f 100644
--- a/apps/dav/lib/Connector/Sabre/TagsPlugin.php
+++ b/apps/dav/lib/Connector/Sabre/TagsPlugin.php
@@ -120,7 +120,7 @@ class TagsPlugin extends \Sabre\DAV\ServerPlugin {
 		$isFav = false;
 		$tags = $this->getTags($fileId);
 		if ($tags) {
-			$favPos = array_search(self::TAG_FAVORITE, $tags);
+			$favPos = array_search(self::TAG_FAVORITE, $tags, true);
 			if ($favPos !== false) {
 				$isFav = true;
 				unset($tags[$favPos]);
diff --git a/apps/settings/lib/Settings/Personal/PersonalInfo.php b/apps/settings/lib/Settings/Personal/PersonalInfo.php
index 5f02843e1db..726a674ad2b 100644
--- a/apps/settings/lib/Settings/Personal/PersonalInfo.php
+++ b/apps/settings/lib/Settings/Personal/PersonalInfo.php
@@ -238,11 +238,11 @@ class PersonalInfo implements ISettings {
 		$languages = $this->l10nFactory->getLanguages();
 
 		// associate the user language with the proper array
-		$userLangIndex = array_search($userConfLang, array_column($languages['commonLanguages'], 'code'));
+		$userLangIndex = array_search($userConfLang, array_column($languages['commonLanguages'], 'code'), true);
 		$userLang = $languages['commonLanguages'][$userLangIndex];
 		// search in the other languages
 		if ($userLangIndex === false) {
-			$userLangIndex = array_search($userConfLang, array_column($languages['otherLanguages'], 'code'));
+			$userLangIndex = array_search($userConfLang, array_column($languages['otherLanguages'], 'code'), true);
 			$userLang = $languages['otherLanguages'][$userLangIndex];
 		}
 		// if user language is not available but set somehow: show the actual code as name
diff --git a/apps/user_status/lib/Listener/UserLiveStatusListener.php b/apps/user_status/lib/Listener/UserLiveStatusListener.php
index aad0943b8d0..8874f8563c5 100644
--- a/apps/user_status/lib/Listener/UserLiveStatusListener.php
+++ b/apps/user_status/lib/Listener/UserLiveStatusListener.php
@@ -82,7 +82,7 @@ class UserLiveStatusListener implements IEventListener {
 
 		// If the emitted status is more important than the current status
 		// treat it as outdated and update
-		if (array_search($event->getStatus(), StatusService::PRIORITY_ORDERED_STATUSES) < array_search($userStatus->getStatus(), StatusService::PRIORITY_ORDERED_STATUSES)) {
+		if (array_search($event->getStatus(), StatusService::PRIORITY_ORDERED_STATUSES, true) < array_search($userStatus->getStatus(), StatusService::PRIORITY_ORDERED_STATUSES, true)) {
 			$needsUpdate = true;
 		}