Wordpress Plugin Checker

<html>
<title>WORDPRESS PLUGIN CHECK</title>
<body bgcolor=silver><center><div style=background:black;margin:0px;padding:4px;text-align:center;color:silver;><i><b><font color=lime>&copy; </font><a href=mailto:[email protected]>AZZATSSINS CYBERSERKERS</a></b></i></div><br><br>
    <form method='POST'>
    <textarea name='sites' cols='45' rows='15'></textarea>
<br>
    _______________________________________________________________
<br><input style="background:dodgerblue;margin:0px;width:15%;padding:0px;color:#fff;border:0;font-weight:bold;" value="EXECUTE" type="submit"><br><br><br>
    </form>
</center>
<?
$sites = explode("\r\n", $_POST['sites']);
foreach($sites as $target) {
$target = trim($target);
$source = @file_get_contents($target);

preg_match_all("#/plugins/(.*?)/#i", $source, $f);

$plugins=array_unique($f[1]);

if(count($plugins)==0){ echo "";}

foreach($plugins as $plugin){

echo "<b><br>Plugin Vuln >> <font color=green><u>$plugin</u></font><br><br></b>";

}

}
?>