ข้อคำชี้แนะ code php connect to network share server

<?php

$fileLocation = "D:/WCE/"; (ผ่าน แต่พอจะใช้ path)  //$fileLocation = '\191.20.2.16server18HISERIES.rar';  (ไม่ได้ Error)

if (file_exists($fileLocation)) {

    echo "$filename was last modified: " . date ("F d Y H:i:s.", filemtime($fileLocation));

}
?>