php发送http请求带json格式数据

$url="http://localhost:9090/";

$params= json_encode(array(

'users'=>array(

array('user_id'=>'1','name'=>'tony'),

array('user_id'=>'2','name'=>'andy')

)));

$ch= curl_init();

curl_setopt($ch, CURLOPT_URL,$url);

curl_setopt($ch, CURLOPT_HTTPHEADER,array(

'Content-Type: application/json',

'Content-Length: '.strlen($params)

));

curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);

curl_setopt($ch, CURLOPT_BINARYTRANSFER, true);

curl_setopt($ch, CURLOPT_CUSTOMREQUEST,"POST");

curl_setopt($ch, CURLOPT_POSTFIELDS,$params);

$res= curl_exec($ch);

curl_close($ch);

var_dump($res);

转自：http://www.01happy.com/php-send-post-request-body-is-json/