PHP 使用 curl 提交 json 格式数据

$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);

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