CodeIgniter 4 API：捕获并返回错误到HTTP响应

<?php

namespace Config;

use CodeIgniter\Config\BaseConfig;

class Exceptions extends BaseConfig
{
    /**
     * --------------------------------------------------------------------------
     * Should We Show the Error Display?
     * --------------------------------------------------------------------------
     *
     * Environmental variable determining whether or not we should display errors
     * to the web page. When set to false, will NOT show them, but will still
     * log them.
     *
     * @var bool
     */
    public $showErrors = true;

    /**
     * --------------------------------------------------------------------------
     * Should We Show the Exception Trace?
     * --------------------------------------------------------------------------
     *
     * Environmental variable determining whether or not we should display the
     * trace of the exceptions. When set to false, will NOT show them, but will
     * still log them.
     *
     * @var bool
     */
    public $showTrace = true;

    /**
     * --------------------------------------------------------------------------
     * Error Logging Threshold
     * --------------------------------------------------------------------------
     *
     * If you have enabled error logging, you can set an error threshold to
     * determine what gets logged. Threshold options are:
     *
     *      0 = Disables logging, Error logging ignored
     *      1 = Error Messages (including PHP errors)
     *      2 = Debug Messages
     *      3 = Informational Messages
     *      4 = All Messages
     *
     * For a live site you'll usually only enable Errors (1) to be logged otherwise
     * your log files will fill up very quickly.
     *
     * @var int
     */
    public $logThreshold = 0;

    /**
     * --------------------------------------------------------------------------
     * Should We Log the exceptions?
     * --------------------------------------------------------------------------
     *
     * If true, then exceptions will be logged to the log file.
     *
     * @var bool
     */
    public $log = false; // 将此处改为 false
    // ... 更多配置
}

<?php

namespace App\Controllers;

use CodeIgniter\API\ResponseTrait;
use CodeIgniter\Controller;

class ApiController extends Controller
{
    use ResponseTrait;

    public function index()
    {
        try {
            // 模拟一个错误
            throw new \Exception('这是一个测试错误');

        } catch (\Exception $e) {
            $response = [
                'status' => 500,
                'error' => true,
                'messages' => [
                    'error' => $e->getMessage()
                ]
            ];
            return $this->respond($response, 500);
        }

        $data = ['message' => 'API正常运行'];
        return $this->respond($data);
    }
}