function httpPost($url, $data,$cookieStr='')

{

	$url_array = parse_url($url);

	$host = $url_array['host'];

	$port = isset($url_array['port'])?($url_array['port']):80;

	 if(!($conn = fsockopen($host,$port,$errno, $errstr, 30)))

	{

		 return false;

	} 

	$header = "POST ".$url." HTTP/1.1\r\n";

	$header.= "Host : {$host}\r\n";

	$header.= "Content-type: application/x-www-form-urlencoded\r\n";

	$header.= "Content-Length:".strlen($data)."\r\n";

	$header.= "Connection: close\r\n";

        //这里是用来写cookie的

	if (!empty($cookieStr)) {

		$header.="Cookie: ".$cookieStr."\r\n";

	}

	//注意下面开头还加了个换行，结尾是两个换行

	$header.= "\r\n{$data}\r\n\r\n";

	//写数据

	fwrite($conn,$header);

    //这里读cookie

	$cookieStr=array();

    //下面的判断，读到空行时，说明头已经结束了，接下来是内容。

    while( ($line=trim(fgets($conn))) != "" )

        {

			$header.=$line; /*   */

            if(strstr($line,"Set-Cookie:"))

            {

                list($coo,$cookieLine)=explode(" ",$line);

                $cookieStr[] = $cookieLine;

            }

        }

    //if($len <= 0)

    //{

    //    return false;

   // }

    //读数据

    //$body=fread($conn,$len);

    while (!feof($conn)) {

	  $body .= fread($conn, 8192);

	}

	fclose($conn);

	$result['body'] = $body;

	$result['cookieArr'] = $cookieStr;

	return $result;

}