使用 PHP cURL 提交 JSON 数据

http://www.oschina.net/code/snippet_54100_7351

http://www.lornajane.net/posts/2011/posting-json-data-with-php-curl

$data = array("name" => "Hagrid", "age" => "36");
$data_string = json_encode($data);
 
$ch = curl_init('http://api.local/rest/users');
curl_setopt($ch, CURLOPT_CUSTOMREQUEST, "POST");
curl_setopt($ch, CURLOPT_POSTFIELDS,$data_string);
curl_setopt($ch, CURLOPT_RETURNTRANSFER,true);
curl_setopt($ch, CURLOPT_HTTPHEADER, array(
    'Content-Type: application/json',
    'Content-Length: ' . strlen($data_string))
);
  
$result = curl_exec($ch);
curl_close($ch);

接收端使用 $GLOBALS['HTTP_RAW_POST_DATA']

或者

$postdata = file_get_contents("php://input");