Curl不起作用，没有结果

我一直在使用一个带有curl的脚本，它运行得很好，但从上一天起就不起作用了，我发现我使用这个脚本的网站最初是http，现在变成了https，所以我把http改成了https但没有成功，所以如果你们能检查一下这个代码，它出了什么问题？

$userSearch = array();
$loginURL = "https://www.infamousgangsters.com/checkuser.php";
$referer = "https://www.infamousgangsters.com/index.php"; 
$agent = "OrgyBot (Checking list of users to see if they are dead)"; 
$postFields = array
(
    "username" => "d34dch3ck",
    "password" => "d34dch3ck93",
    "sublogin" => "+Login+"
); 

$ch = curl_init(); 
curl_setopt($ch, CURLOPT_URL, $loginURL); 
curl_setopt($ch, CURLOPT_USERAGENT, $agent);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, false);
curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_POSTFIELDS, $postFields);
curl_setopt($ch, CURLOPT_HEADER, false);
curl_setopt($ch, CURLOPT_REFERER, $referer);
curl_setopt($ch, CURLOPT_COOKIEJAR, 'cookiejar'); 
curl_setopt($ch, CURLOPT_COOKIEFILE, 'cookiejar');
ob_start();
$output = curl_exec($ch);
ob_end_clean();
curl_close($ch);
unset($ch);
echo $output;