Add missing `static` to FileUtil::extensionAllowsPhpExecution() definition

see #5593

diff --git a/wcfsetup/install/files/lib/util/FileUtil.class.php b/wcfsetup/install/files/lib/util/FileUtil.class.php
index 3a4410f1a2f419b37c4de0f8ec3f3dc754b8b4b5..9693c9c55a6fc69b2ee1b49a8902f8c39608b985 100644 (file)
--- a/wcfsetup/install/files/lib/util/FileUtil.class.php
+++ b/wcfsetup/install/files/lib/util/FileUtil.class.php
@@ -744,7 +744,7 @@ final class FileUtil
      * PHP code and thus must not be used for untrusted files uploaded by
      * a user.
      */
-    public function extensionAllowsPhpExecution(string $extension): bool
+    public static function extensionAllowsPhpExecution(string $extension): bool
     {
         return !!\preg_match('/^\.?(php[0-9]*|phtml)$/i', $extension);
     }