/**
* curl请求指定url(POST请求)
* $url请求的URL
* $data 请求传递的数据
*/
function http_request($url,$data = null,$headers=array())
{
$curl = curl_init();
if( count($headers) >= 1 ){
curl_setopt($curl, CURLOPT_HTTPHEADER, $headers);
}
curl_setopt($curl, CURLOPT_URL, $url);

			curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, FALSE);
			curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, FALSE);

			if (!empty($data)){
				curl_setopt($curl, CURLOPT_POST, 1);
				curl_setopt($curl, CURLOPT_POSTFIELDS, $data);
			}
			curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
			$output = curl_exec($curl);
			curl_close($curl);
			return $output;
}