读取目录在窗口的浏览器中远程打开但不能在php脚本opendir（）函数中工作

Question

I am trying to read remote directory files from another shared system, able to open files in browser but getting error when reading using php script opedir() function.

Code:

$filesDir = "file://css-app-002-s/cs/files/";

var_dump(is_dir($filesDir));

if ($handle = opendir($filesDir)) {
    $dirList = array_diff(scandir($filesDir), array('..', '.'));
}

print_r($dirList);

error:

Warning: opendir() [function.opendir]: remote host file access not supported, file://css-app-002-s/cs/files/