php读xml

php文件

php
  class  xpathExtension{
    public   static   function  getNodes( $domDoc ,   $xpathString ) {
         $xp   =   new  DOMXPath( $domDoc );
         $xp -> registerNamespace( ' x ' ,   ' http://www.w3.org/1999/xhtml ' );
         $xp -> registerNamespace( ' xhtml ' ,   ' http://www.w3.org/1999/xhtml ' );
         $xp -> registerNamespace( ' i18n ' ,   ' http://apache.org/cocoon/i18n/2.1 ' );

         $ret   =   array ();
         $nodes   =   $xp -> query( $xpathString );
         foreach  ( $nodes   as   $node ) {
             array_push ( $ret ,   $node );
        }
         return   $ret ;
    }
}
$domDoc   =   new  DOMDocument();
$domDoc -> load( " x1.xml " );
$xpathString   =   " //xml/products/product/description " ;
$domNodeList   =  xpathExtension :: getNodes( $domDoc ,   $xpathString );
// echo count($domNodeList);
foreach ( $domNodeList   as   $domNode ){
    echo   $domNode -> nodeValue;
}

?>

xml

xml version="1.0" encoding="utf-8"  ?>

  
    
        
            abcd
         description >
     product >
   products >
xml >