ApiUtils

ApiUtils.php

<?php
function api_forminput_jsonoutput($get_action, $post_action) {
  header('Content-Type: application/json; charset=utf-8');
  try {
    if ($_SERVER["REQUEST_METHOD"] == "POST") {
      echo json_encode($post_action());
    } else {
        echo json_encode($get_action());
    }
  } catch(RuntimeException $e) {
    if(get_class($e) === 'RequestValidationException') {
      http_response_code(400);
      echo json_encode(ResponseUtil::ng($e, 400));
    } else {
      http_response_code(500);
      echo json_encode(ResponseUtil::ng($e, 500));
    }
  }
}

class ResponseUtil {
  static function ok($ary) {
    return array(
      "status" => array(
        "code" => 200
      ),
      "result" => $ary
    );
  }

  static function ng(RuntimeException $e, int $code = 500) {
    return array(
      "status" => array(
        "code" => $code
      ),
      "error" => array(
        "type" => get_class($e),
        "message" => $e->getMessage(),
        "trace" => $e->getTrace(),
      )
    );
  }
}

class RequestValidationException extends RuntimeException {

}