From 88466c6a49880a22a132295b900570c518b27786 Mon Sep 17 00:00:00 2001
From: vlakoff <544424+vlakoff@users.noreply.github.com>
Date: Tue, 27 May 2025 07:58:35 +0200
Subject: [PATCH] Simplify GIF magic number detection (#1446)

Removed unnecessary bin2hex() conversion.
---
 src/Drivers/AbstractDecoder.php | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/src/Drivers/AbstractDecoder.php b/src/Drivers/AbstractDecoder.php
index 029761ba..cdf94352 100644
--- a/src/Drivers/AbstractDecoder.php
+++ b/src/Drivers/AbstractDecoder.php
@@ -24,10 +24,7 @@ abstract class AbstractDecoder implements DecoderInterface
     {
         $head = substr($input, 0, 6);
 
-        return 1 === preg_match(
-            "/^47494638(37|39)61/",
-            strtoupper(bin2hex($head))
-        );
+        return $head === 'GIF87a' || $head === 'GIF89a';
     }
 
     /**