Mit PHP und cURL in Intranet einloggen

error_reporting(E_ALL);
ini_set('display_errors', 1);

if (isset($_POST["button"])) {
    $username = $_POST["username"];
    $pin = (int)$_POST["pin"];
    $password = (int)$pass;
    $loginUrl = 'https://xyz.de/somepage/login.cgi';
    $var = "username=" . $username . "&password=" . $pin . $password;
    //init curl
    $ch = curl_init();
    //Set the URL to work with
    curl_setopt($ch, CURLOPT_URL, $loginUrl);
    curl_setopt($ch, CURLOPT_USERAGENT,
        "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_6) AppleWebKit/604.3.5 (KHTML, like Gecko) Version/11.0.1 Safari/604.3.5");
    // ENABLE HTTP POST
    curl_setopt($ch, CURLOPT_POST, 1);
    //Set the post parameters
    curl_setopt($ch, CURLOPT_POSTFIELDS, $var);
    //Handle cookies for the login
    curl_setopt($ch, CURLOPT_COOKIEJAR, 'cookie.txt');
    //Setting CURLOPT_RETURNTRANSFER variable to 1 will force cURL
    //not to print out the results of its query.
    //Instead, it will return the results as a string return value
    //from curl_exec() instead of the usual true/false.
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
    //execute the request (the login)
    $store = curl_exec($ch);
}
//the login is now done and you can continue to get the
//protected content.
//set the URL to the protected file
curl_setopt($ch, CURLOPT_URL, 'https://xyz.de/somepage/desired-site');
//execute the request
$content = curl_exec($ch);
curl_close($ch);
//save the data to disk
file_put_contents('/downloads/download.txt', $content);

curl_setopt($ch, CURLOPT_URL, 'https://xyz.de/somepage/desired-site');

// NEU
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1); //

$content = curl_exec($ch);

// NEU
var_dump($content);
// 
curl_close($ch);
file_put_contents('/downloads/download.txt', $content);