cURL请求返回奇怪的值

Question

我尝试使用此代码发布表单

$url_server = "http://insta.kingdompanel.xyz/addlikes.php";
                $postdata = array(
                    'url' => $url,
                    'comment' => $comment);
                $ch = curl_init();
                curl_setopt($ch, CURLOPT_AUTOREFERER, true);
                curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
                curl_setopt($ch, CURLOPT_TIMEOUT, 500 );          
                curl_setopt($ch,CURLOPT_URL,$url_server);
                curl_setopt($ch,CURLOPT_RETURNTRANSFER,1);
                curl_setopt($ch,CURLOPT_POST,1);
                curl_setopt($ch,CURLOPT_POSTFIELDS,$postdata);
                curl_setopt($ch, CURLOPT_HTTPHEADER, array('Access-Control-Allow-Origin: *','Content-type: application/x-www-form-urlencoded'));
                $output = curl_exec($ch);
                if ($output == FALSE){
                    echo "CURL ERROR".curl_error($ch);
                }
                curl_close($ch);
                print_r($output);

但它会返回类似的内容 它被阻止了吗？ 但我读到一些网站无法阻止cURL请求的内容。 或者我做错了什么？谢谢