From b45c6f5363f9115164e56e1f9e954668eeef45a3 Mon Sep 17 00:00:00 2001
From: Viktor Khokhryakov <viktor.khokhryakov@gmail.com>
Date: Mon, 20 Mar 2017 10:42:28 +0400
Subject: [PATCH] Autoloading must be skipped while checking for php builtin
 class.

---
 library/HTMLPurifier/Lexer.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/library/HTMLPurifier/Lexer.php b/library/HTMLPurifier/Lexer.php
index 99b3c7df..e9da3ed5 100644
--- a/library/HTMLPurifier/Lexer.php
+++ b/library/HTMLPurifier/Lexer.php
@@ -96,7 +96,7 @@ class HTMLPurifier_Lexer
                         break;
                     }
 
-                    if (class_exists('DOMDocument') &&
+                    if (class_exists('DOMDocument', false) &&
                         method_exists('DOMDocument', 'loadHTML') &&
                         !extension_loaded('domxml')
                     ) {