Slim 4 捕捉 php 警告、通知和错误

Question

我刚开始使用 slim 框架，想使用自定义错误处理程序捕获 php 警告、通知和错误。

ErrorHandlerMiddleware.php

<?php

namespace App\Middleware;

use Psr\Http\Message\ResponseInterface;
use Psr\Http\Message\ServerRequestInterface;
use Psr\Http\Server\MiddlewareInterface;
use Psr\Http\Server\RequestHandlerInterface;

final class ErrorHandlerMiddleware implements MiddlewareInterface {

    var $errtext;

    public function __construct() {}

    public function process(ServerRequestInterface $request, RequestHandlerInterface $handler): ResponseInterface {
        
        $errorTypes = E_ALL;
        set_error_handler(function ($errno, $errstr, $errfile, $errline) {

            $this->errtext = $errno;
            switch ($errno) {
                
                case E_USER_ERROR:
                    
                    //do something
                    break;

                case E_USER_WARNING:
                    
                    //do something
                    break;

                default:

                    //do something
                    break;

            }
            return true;

        }, $errorTypes );
        
        $request = $request->withAttribute('error',  $this->errtext);
        return $handler->handle($request);

    }
}

index.php

<?php 

    use Psr\Http\Message\ResponseInterface as Response;
    use Psr\Http\Message\ServerRequestInterface as Request;
    use Slim\Factory\AppFactory;
    use App\Middleware\ErrorHandlerMiddleware;
    
    require_once("vendor/autoload.php");

    $app = AppFactory::create();
    $app->setBasePath("/data");
    $app->addRoutingMiddleware();
    
    $app->get('/', function (Request $request, Response $response) {
        $response->getBody()->write('<a href="hello/world">Try /hello/world</a>');
        return $response;
    });

    $app->add(ErrorHandlerMiddleware::class);
    $errorMiddleware = $app->addErrorMiddleware(true, true, true);
    $app->run();

自定义错误处理程序正在工作（不再显示 php 警告）。但我想在错误处理程序修改的输出中添加一些自定义变量。这应该由

$request = $request->withAttribute('error',  $this->errtext);
$request->getAttribute('error'); 

但错误属性为空。

Answer 1

编辑：当你定义一个回调函数时，那么$this不在同一个范围内。此外，当发生错误时，中间件实例本身也不会“恢复”。另一种方法是抛出一个自定义异常以在另一个中间件中捕获并呈现它。