Merge branch '4.x' of https://github.com/craftcms/cms into 5.x

CHANGELOG.md

@@ -3,6 +3,7 @@
 ## Unreleased
 
 - Fixed a bug where the control panel could display a notice about the Craft CMS license belonging to a different domain, even when accessing the control panel from the correct domain. ([#16396](https://github.com/craftcms/cms/issues/16396))
+- Fixed a bug where Unicode special characters weren’t getting stripped out of search keywords. ([#16430](https://github.com/craftcms/cms/issues/16430))
 - Fixed a bug where field layout elements’ action menus could have an empty action group.
 - Fixed a bug where Single section entries could be duplicated after running the `entry-types/merge` command. ([#16394](https://github.com/craftcms/cms/issues/16394))
 - Fixed a styling bug with the system message modal. ([#16410](https://github.com/craftcms/cms/issues/16410))

src/helpers/Search.php

@@ -39,6 +39,10 @@ public static function normalizeKeywords(array|string $str, array $ignore = [],
         // Convert non-breaking spaces entities to regular ones
         $str = str_replace([' ', ' ', ' '], ' ', $str);
 
+        // Get rid of Unicode special characters
+        // (see https://github.com/craftcms/cms/issues/16430)
+        $str = preg_replace('/[\x{80}-\x{10FFFF}]/u', '', $str);
+
         // Get rid of entities
         $str = preg_replace('/&#?[a-z0-9]{2,8};/i', '', $str);