Show serial number Harddisk with php

script:
<?php
 
function GetVolumeLabel($drive) {
  // Try to grab the volume name
  if (preg_match('#Volume Serial Number is (.*)\n#i', shell_exec('dir '.$drive.':'), $m)) {
    $volname = ' ('.$m[1].')';
  } else {
    $volname = '';
  }
return $volname;
}
 
$serial =  str_replace("(","",str_replace(")","",GetVolumeLabel("c")));
 
echo $serial;
 
?>