使用 PHP cURL 提交 JSON 数据

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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");