From d11d735a66da73455239c70ccddece5e52bb9d7b Mon Sep 17 00:00:00 2001
From: Brooke Bryan <brooke@bajb.net>
Date: Thu, 21 Mar 2024 13:39:48 +0000
Subject: [PATCH] Safety check on strpos

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

diff --git a/src/System.php b/src/System.php
index 9adb681..2f766a4 100644
--- a/src/System.php
+++ b/src/System.php
@@ -161,7 +161,7 @@ public static function isAppEngine($server = null)
       $server = $_SERVER['SERVER_SOFTWARE'];
     }
 
-    return strpos($server, 'Google App Engine') !== false;
+    return $server && strpos($server, 'Google App Engine') !== false;
   }
 
   /**