From 420dfcbdbfd1a3008f8095ee4ecebe9da749cb1b Mon Sep 17 00:00:00 2001
From: Johannes Meyer <johannes.meyer@icinga.com>
Date: Fri, 14 Jan 2022 11:24:20 +0100
Subject: [PATCH] Avoid passing non-string args to `ctype_*()` functions

---
 library/Director/Data/ValueFilter/FilterInt.php | 4 ++--
 library/Director/Web/Table/QuickTable.php       | 2 +-
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/library/Director/Data/ValueFilter/FilterInt.php b/library/Director/Data/ValueFilter/FilterInt.php
index b3de294c..d51ce8d6 100644
--- a/library/Director/Data/ValueFilter/FilterInt.php
+++ b/library/Director/Data/ValueFilter/FilterInt.php
@@ -8,11 +8,11 @@ class FilterInt implements ValueFilter
 {
     public function filter($value)
     {
-        if ($value === '') {
+        if ($value === '' || $value === null) {
             return null;
         }
 
-        if (! ctype_digit($value)) {
+        if (is_string($value) && ! ctype_digit($value)) {
             return $value;
         }
 
diff --git a/library/Director/Web/Table/QuickTable.php b/library/Director/Web/Table/QuickTable.php
index 83842f2c..ff3edcc0 100644
--- a/library/Director/Web/Table/QuickTable.php
+++ b/library/Director/Web/Table/QuickTable.php
@@ -473,7 +473,7 @@ abstract class QuickTable implements Paginatable, ValidHtml
     protected function valueToTimestamp($value)
     {
         // We consider integers as valid timestamps. Does not work for URL params
-        if (ctype_digit($value)) {
+        if (! is_string($value) || ctype_digit($value)) {
             return $value;
         }
         $value = strtotime($value);