提交的内容

vendor/ezyang/htmlpurifier/library/HTMLPurifier/Lexer.php

@@ -101,7 +101,7 @@ class HTMLPurifier_Lexer
                         break;
                     }
 
-                    if (class_exists('DOMDocument', false) &&
+                    if (class_exists('DOMDocument') &&
                         method_exists('DOMDocument', 'loadHTML') &&
                         !extension_loaded('domxml')
                     ) {
@@ -269,20 +269,6 @@ class HTMLPurifier_Lexer
         );
     }
 
-    /**
-     * Special Internet Explorer conditional comments should be removed.
-     * @param string $string HTML string to process.
-     * @return string HTML with conditional comments removed.
-     */
-    protected static function removeIEConditional($string)
-    {
-        return preg_replace(
-            '#<!--\[if [^>]+\]>.*?<!\[endif\]-->#si', // probably should generalize for all strings
-            '',
-            $string
-        );
-    }
-
     /**
      * Callback function for escapeCDATA() that does the work.
      *
@@ -323,8 +309,6 @@ class HTMLPurifier_Lexer
         // escape CDATA
         $html = $this->escapeCDATA($html);
 
-        $html = $this->removeIEConditional($html);
-
         // extract body from document if applicable
         if ($config->get('Core.ConvertDocumentToFragment')) {
             $e = false;