From 9445e616bc255e06c669c22ce7a436f4756071fe Mon Sep 17 00:00:00 2001
From: Fabio Bas <fabio.bas@officineinformatiche.net>
Date: Wed, 1 Oct 2025 12:05:45 +0200
Subject: [PATCH] fix: avoid warning from exif_imagetype() on corrupted png
 images

---
 library/HTMLPurifier/URIScheme/data.php | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/library/HTMLPurifier/URIScheme/data.php b/library/HTMLPurifier/URIScheme/data.php
index 02e540cb..2648de4a 100644
--- a/library/HTMLPurifier/URIScheme/data.php
+++ b/library/HTMLPurifier/URIScheme/data.php
@@ -93,7 +93,9 @@ public function doValidate(&$uri, $config, $context)
         }
         file_put_contents($file, $raw_data);
         if (function_exists('exif_imagetype')) {
+            set_error_handler(array($this, 'muteErrorHandler'));
             $image_code = exif_imagetype($file);
+            restore_error_handler();
             unlink($file);
         } elseif (function_exists('getimagesize')) {
             set_error_handler(array($this, 'muteErrorHandler'));