帮忙看下CURL请求网页api.php的问题

$.POST('api.php',{'url':''},function(data){

    code...

},json);

Accept:application/json, text/Javascript, */*; q=0.01

Accept-Encoding:gzip, deflate

Accept-Language:zh-CN,zh;q=0.8

Cache-Control:max-age=0

Connection:keep-alive

Content-Length:50

Content-Type:application/x-www-form-urlencoded; charset=UTF-8

COOKIE:Hm_lvt_XXXXX; a8167_pages=6; a8167_times=7

Host:XXX.cn

Origin:http://XXX.cn

Referer:http://XXX.cn/XXXX/?url=http://www.XXX.com/XXX.html

User-Agent:Mozilla/5.0 (Windows NT 6.3; WOW64) AppleWebKit/537.36 (KHTML, like Gecko)

X-Requested-With:XMLHttpRequest

    $header[] = array('Content-Type: application/json','Content-Length: ' . strlen($postData));

    $data= '{"url" : "http://www.XXX.com/XXX.html"}';

    $refer = "http://XXX.cn/XXX/?url=http://www.XXX.com/XXX.html";





    $ch = curl_init();



    curl_setopt($ch, CURLOPT_URL,"http://XXX.cn/XXX/api.php");

    curl_setopt($ch, CURLOPT_POST, 1);

    curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 60);

    curl_setopt($ch, CURLOPT_HTTPHEADER, $header);

    curl_setopt($ch, CURLOPT_POSTFIELDS , $data);

    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);

    curl_setopt($ch, CURLOPT_REFERER, $refer);

    curl_setopt($ch, CURLOPT_USERAGENT, "Mozilla/5.0 (Windows NT 6.3; WOW64) AppleWebKit/537.36 (KHTML, like Gecko)");



    $output = curl_exec($ch);



    var_dump($output);

   

    curl_close($ch);      

?>