异常处理

<?php
use Hyperf\HttpMessage\Stream\SwooleStream;
use Hyperf\Nano\Factory\AppFactory;
require_once __DIR__ . '/vendor/autoload.php';
$app = AppFactory::create();
$app->get('/', function () {
    throw new \Exception();
});
$app->addExceptionHandler(function ($throwable, $response) {
    return $response->withStatus('418')
        ->withBody(new SwooleStream('I\'m a teapot'));
});
$app->run();