From d0bf25d6f2e4e69f0b12c9216dfb90de6ea8c332 Mon Sep 17 00:00:00 2001
From: W0rma <beck.worma@gmail.com>
Date: Thu, 7 Oct 2021 14:48:42 +0200
Subject: [PATCH] Only call validate() if callback is a string to avoid a
 deprecation warning in PHP 8.1

---
 View/JsonpHandler.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/View/JsonpHandler.php b/View/JsonpHandler.php
index 698cb05ac..58db4a849 100644
--- a/View/JsonpHandler.php
+++ b/View/JsonpHandler.php
@@ -50,7 +50,7 @@ private function getCallback(Request $request): string
         $callback = $request->query->get($this->callbackParam);
         $validator = new \JsonpCallbackValidator();
 
-        if (!$validator->validate($callback)) {
+        if (!is_string($callback) || !$validator->validate($callback)) {
             throw new BadRequestHttpException('Invalid JSONP callback value');
         }