post传递数据

$ci = curl_init($url);
curl_setopt($ci, CURLOPT_HEADER, 0);
curl_setopt($ci, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ci, CURLOPT_POST, 1);
curl_setopt($ci,CURLOPT_POSTFIELDS,$data);
$return = curl_exec($ci);
echo $return;
curl_close($ch);

    $url="www.baidu.com?id=1";
        $ch = curl_init($url);
        curl_setopt($ch, CURLOPT_HEADER, 0);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
        $response = curl_exec($ch);
        echo $response;