{dede:php}标签错误BUG的修正办法

<?php
if(!defined('DEDEINC')) exit('Request Error!');

function lib_php(&$ctag, &$refObj)
{
           global $dsql;
           global $db;
    $phpcode = trim($ctag->GetInnerText());
    if($phpcode=='') return '';
    ob_start();
    extract($GLOBALS,  EXTR_SKIP);
    eval($phpcode);
    $revalue = ob_get_contents();
    ob_clean();
    return $revalue;
}
//liehuo.net
?>