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<title>[24902] trunk/wp-includes/class-oembed.php: Improved XML handling for oEmbed.</title>
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<dl class="meta">
<dt>Revision</dt> <dd><a href="http://core.trac.wordpress.org/changeset/24902">24902</a></dd>
<dt>Author</dt> <dd>mdawaffe</dd>
<dt>Date</dt> <dd>2013-07-30 21:57:27 +0000 (Tue, 30 Jul 2013)</dd>
</dl>

<h3>Log Message</h3>
<pre>Improved XML handling for oEmbed.</pre>

<h3>Modified Paths</h3>
<ul>
<li><a href="#trunkwpincludesclassoembedphp">trunk/wp-includes/class-oembed.php</a></li>
</ul>

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<div id="patch">
<h3>Diff</h3>
<a id="trunkwpincludesclassoembedphp"></a>
<div class="modfile"><h4>Modified: trunk/wp-includes/class-oembed.php (24901 => 24902)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/wp-includes/class-oembed.php       2013-07-30 20:27:35 UTC (rev 24901)
+++ trunk/wp-includes/class-oembed.php  2013-07-30 21:57:27 UTC (rev 24902)
</span><span class="lines">@@ -221,27 +221,52 @@
</span><span class="cx">   * @access private
</span><span class="cx">   */
</span><span class="cx">  function _parse_xml( $response_body ) {
</span><del>-               if ( !function_exists('simplexml_load_string') ) {
-                       return false;
-               }
</del><span class="cx">           if ( ! function_exists( 'libxml_disable_entity_loader' ) )
</span><span class="cx">                  return false;
</span><span class="cx"> 
</span><span class="cx">          $loader = libxml_disable_entity_loader( true );
</span><ins>+               $errors = libxml_use_internal_errors( true );
</ins><span class="cx"> 
</span><del>-               $errors = libxml_use_internal_errors( true );
-               $data = simplexml_load_string( $response_body );
</del><ins>+                $return = $this->_parse_xml_body( $response_body );
+
</ins><span class="cx">           libxml_use_internal_errors( $errors );
</span><ins>+               libxml_disable_entity_loader( $loader );
</ins><span class="cx"> 
</span><del>-               $return = false;
-               if ( is_object( $data ) ) {
-                       $return = new stdClass;
-                       foreach ( $data as $key => $value ) {
-                               $return->$key = (string) $value;
-                       }
</del><ins>+                return $return;
+       }
+
+       /**
+        * Helper function for parsing an XML response body.
+        *
+        * @since 3.6.0
+        * @access private
+        */
+       private function _parse_xml_body( $response_body ) {
+               if ( ! function_exists( 'simplexml_import_dom' ) || ! class_exists( 'DOMDocument' ) )
+                       return false;
+
+               $dom = new DOMDocument;
+               $success = $dom->loadXML( $response_body );
+               if ( ! $success )
+                       return false;
+
+               if ( isset( $dom->doctype ) )
+                       return false;
+
+               foreach ( $dom->childNodes as $child ) {
+                       if ( XML_DOCUMENT_TYPE_NODE === $child->nodeType )
+                               return false;
</ins><span class="cx">           }
</span><span class="cx"> 
</span><del>-               libxml_disable_entity_loader( $loader );
</del><ins>+                $xml = simplexml_import_dom( $dom );
+               if ( ! $xml )
+                       return false;
+
+               $return = new stdClass;
+               foreach ( $xml as $key => $value ) {
+                       $return->$key = (string) $value;
+               }
+
</ins><span class="cx">           return $return;
</span><span class="cx">  }
</span><span class="cx"> 
</span></span></pre>
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