4shared bypass timer download

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
    <title>
    4shared Bypass Timer Download
    </title>
</head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<body>
    4shared Bypass Timer Download
    <br />
    <form action="<?php echo htmlentities($_SERVER['PHP_SELF'],ENT_QUOTES); ?>" method="get" />
        <b>Url</b>
            <input type="text" name="url" />
        <br />
    </form>
</body>
</html>

<?php

/*
Initially inspired by http://www.getsongnow.com/
Later Inspired by p0pc0rn (http://w3.tbd.my/thread-8997.html)
*/

function retrieve($url){
    $con = curl_init($url);
    $option = array(
    CURLOPT_RETURNTRANSFER=>1,
    CURLOPT_HEADER=>false,
    CURLOPT_SSL_VERIFYPEER=>false,
    CURLOPT_HTTPAUTH=>CURLAUTH_ANY,
    CURLOPT_FOLLOWLOCATION=>false,
    CURLOPT_MAXREDIRS=>0
    );

    curl_setopt_array($con,$option);

    $exec = curl_exec($con);
    $http_code = curl_getinfo($con);

    if(preg_match("/404/",$http_code['http_code'])){
        die("Site is offline");
    }

    curl_close($con);
    return $exec;
}

if(isset($_GET['url'])){
    $url = $_GET['url'];

    if(function_exists('curl_init')){
        $content = retrieve($url);
    }
    else if(function_exists('file_get_contents')){
        $content = file_get_contents($url);
    }
    else{
        die("Please use another webhosting to try this script");
    }

    if(preg_match("/window\.location \= \"(.*?)\"\;/", $content, $match)){
        echo "Decoded url: <a href=". htmlentities($match[1], ENT_QUOTES) . ">". htmlentities($match[1], ENT_QUOTES) ."</a>";
    }
}

?>