From 116b58b046351854b64e5aada83f3d88223d7575 Mon Sep 17 00:00:00 2001
From: Brent Shaffer <betterbrent@google.com>
Date: Mon, 7 Feb 2022 06:59:09 -0800
Subject: [PATCH] fix: use property_exists for checking key id

---
 src/JWT.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/JWT.php b/src/JWT.php
index 1226102c..6130c59c 100644
--- a/src/JWT.php
+++ b/src/JWT.php
@@ -111,7 +111,7 @@ public static function decode($jwt, $keyOrKeyArray)
             throw new UnexpectedValueException('Algorithm not supported');
         }
 
-        $key = self::getKey($keyOrKeyArray, empty($header->kid) ? null : $header->kid);
+        $key = self::getKey($keyOrKeyArray, property_exists($header, 'kid') ? $header->kid : null);
 
         // Check the algorithm
         if (!self::constantTimeEquals($key->getAlgorithm(), $header->alg)) {