From 01be377f93654fad4d3fbc8c81779f14316eaecf Mon Sep 17 00:00:00 2001
From: Olek Kaim <135211410+olekans@users.noreply.github.com>
Date: Thu, 31 Oct 2024 03:57:29 +0100
Subject: [PATCH] fix: undefined array key warning (#419)

---
 library/HTMLPurifier/EntityParser.php | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/library/HTMLPurifier/EntityParser.php b/library/HTMLPurifier/EntityParser.php
index 3ef2d09e..0f2b83dc 100644
--- a/library/HTMLPurifier/EntityParser.php
+++ b/library/HTMLPurifier/EntityParser.php
@@ -116,8 +116,8 @@ class HTMLPurifier_EntityParser
     protected function entityCallback($matches)
     {
         $entity = $matches[0];
-        $hex_part = @$matches[1];
-        $dec_part = @$matches[2];
+        $hex_part = isset($matches[1]) ? $matches[1] : null;
+        $dec_part = isset($matches[2]) ? $matches[2] : null;
         $named_part = empty($matches[3]) ? (empty($matches[4]) ? "" : $matches[4]) : $matches[3];
         if ($hex_part !== NULL && $hex_part !== "") {
             return HTMLPurifier_Encoder::unichr(hexdec($hex_part));