From 12210b1f077b16ad058c9d1472c9482e3397e245 Mon Sep 17 00:00:00 2001
From: catch <catch@35733.no-reply.drupal.org>
Date: Thu, 10 Mar 2022 13:45:07 +0000
Subject: [PATCH] Issue #3268272 by sayco: TypeError: strpos(): Argument #1
 ($haystack) must be of type string, int given in strpos()

(cherry picked from commit e605d0d3b73185cf5c2561f697c847684413d921)
---
 core/modules/ckeditor5/ckeditor5.module | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/core/modules/ckeditor5/ckeditor5.module b/core/modules/ckeditor5/ckeditor5.module
index 293e1324ef8..9bc27675e3a 100644
--- a/core/modules/ckeditor5/ckeditor5.module
+++ b/core/modules/ckeditor5/ckeditor5.module
@@ -212,7 +212,7 @@ function ckeditor5_form_filter_format_form_alter(array &$form, FormStateInterfac
       }
 
       foreach ($plugins_config_form as $key => &$value) {
-        if (is_array($value) && strpos($key, '#') === FALSE) {
+        if (is_array($value) && strpos((string) $key, '#') === FALSE) {
           _add_ajax_listeners_to_plugin_inputs($value);
         }
       }