GET and POST in PHP

GetAndPost.php

function get($action) {
  try {
    sendJsonResponse($action($_GET));
  } catch(Exception $e) {
    sendJsonResponse([
      'result' => [ 'status' => 'ng', 'message' => $e->getMessage() ]
    ]);
  }
}

function post($action) {
  try {
    sendJsonResponse($action($_POST));
  } catch(Exception $e) {
    sendJsonResponse([
      'result' => [ 'status' => 'ng', 'message' => $e->getMessage() ]
    ]);
  }
}

function getParamOrThrow(array $ary, string $key, Exception $exception) {
  if(isset($ary[$key])) {
    return $ary[$key];
  } else {
    throw $exception;
  }
}