php如何读取3389端口

<?php
// www.jb200.com 脚本学堂收集
$regkey = 'HKEY_LOCAL_MACHINESYSTEMCurrentControlSetControlTerminal ServerWdsrdpwdTdstcpPortNumber';
$shell = new COM('WScript.Shell');
var_dump($shell->RegRead($regkey));
?>