<?php
if(isset($_GET['link'])) {
    $link = $_GET['link'];

    //remove protocol, we're assuming its http
    if(strstr($link, '://') != false){
        $link = substr($link, strpos($link,'://') + strlen('://'));
    }

    //split the url into host (www.example.com) and requested page (index.php) on the first slash
    $host = substr($link, 0, strpos($link, '/'));
    $request = substr($link, strpos($link, '/'));

    //open a socket connection to the site on port 80 (http protocol port)
    $fp = @fsockopen($host, 80, $errno, $errstr);

    if($fp == false){
        $response= "Hallo";
        $response = $errno . " " . $errstr;
    }
    else {
        //create the request headers
        $headers   = array();
        $headers[] = 'HEAD ' . $request . ' HTTP/1.1';
        $headers[] = 'Host: ' . $host;
        //$headers[] = 'Content-Length: 0';
        $headers[] = 'Connection: close';
        $headers[] = 'Content-Type: application/json; charset=utf-8';
        $headers   = implode("\r\n", $headers) . "\r\n\r\n";

        //send our request
        if (!fwrite($fp, $headers)) {
            fclose($fp);
            $response = "Hallo.";
        }
        else {
            //read the response
            $rsp = '';
            while(!feof($fp)) { $rsp .= fgets($fp,8192); }
            //fclose($fp);
            /*
            $hunks = explode("\r\n\r\n",trim($rsp));
            $headers = explode("\n", $hunks[count($hunks) - 1]);
            $response = trim($headers[0]);*/
            $response= $rsp;
        }
    }
}
?>
<html>
    <head>
        <title>Test Link</title>
    </head>
    <body>
        <?php if(isset($response)) {  echo $response;  } ?>
        <form method="get">
            <label for="link">Link</label>
            <input id="link" type="text" name="link" />
        </form>
    </body>
</html>