ping list sites

<form method="post">
<textarea rows="20" cols='50'name="site"></textarea>
<br><input type="submit" name="go" />
</form>

<?
set_time_limit(0);
$site=explode("\n",$_POST['site']);
if($_POST['go']){
foreach($site as $vf){
  $t=trim($vf);
  $v=array("http://","https://","/");
  $m=str_replace($v,"",$t);
  $k=gethostbyname($m);
  echo $t.":".$k."<br>";
}
     }


?>
<b>by hamza kille</b>