DELETE:

curl_setopt($ch, CURLOPT_CUSTOMREQUEST, 'DELETE');

PUT:

curl_setopt($ch, CURLOPT_PUT, true);

GET:

curl_setopt($ch, CURLOPT_HTTPGET, true);

POST:

curl_setopt($ch, CURLOPT_POST, true);

可以通过$_SERVER['REQUEST_METHOD']获得请求类型，

PUT/DELETE的参数可以这样获取：

parse_str(file_get_contents('php://input'), $request_vars);