回答问题1：
我几乎可以模拟 PHP 错误处理程序记录 PHP 错误的方式。我做的事情：
- 浏览了文档和这个SO question。使用这些我能够将侦听器附加到 Zend-stratigility 的 ErrorHandler
- 浏览了 PHP 的错误常量和set_error_handler()，这给了我一些关于如何找出发生了哪种类型的错误或异常的想法。
下面是我附加侦听器的 ErrorHandlerFactory 的代码。
<?php
// TODO: PHP 7.0.8 is giving strict erros eben if this directive is not enabled. And that too, it should be enabled per file from my understanding.
//declare(strict_types = 1);
namespace App\Factories;
use Interop\Container\ContainerInterface;
use Psr\Http\Message\RequestInterface;
use Psr\Http\Message\ResponseInterface;
use Zend\Log\Logger as ZendLogger;
use Throwable;
use Zend\Diactoros\Response;
use Zend\Expressive\Middleware\ErrorResponseGenerator;
use Zend\Stratigility\Middleware\ErrorHandler;
class ErrorHandlerFactory
{
/**
* @param ContainerInterface $container
* @return ErrorHandler
* @throws \Psr\Container\ContainerExceptionInterface
* @throws \Psr\Container\NotFoundExceptionInterface
*/
public function __invoke(ContainerInterface $container)
{
$generator = $container->has(ErrorResponseGenerator::class)
? $container->get(ErrorResponseGenerator::class)
: null;
$errorHandler = new ErrorHandler(new Response(), $generator);
// attaching a listener for logging into application's log file.
if ($container->has(ZendLogger::class)) {
/** @var ZendLogger $logger */
$logger = $container->get(ZendLogger::class);
$errorHandler->attachListener(function (
Throwable $throwable,
RequestInterface $request,
ResponseInterface $response
) use ($logger) {
$logger->err(NULL, [
'method' => $request->getMethod(),
'uri' => (string) $request->getUri(),
'message' => $throwable->getMessage(),
'file' => $throwable->getFile(),
'line' => $throwable->getLine(),
]);
});
}
// Attaching second listener for logging the errors into the PHP's error log
$errorHandler->attachListener(function (
Throwable $throwable,
RequestInterface $request,
ResponseInterface $response
) {
// Default Error type, when PHP Error occurs.
$errorType = sprintf("Fatal error: Uncaught %s", get_class($throwable));
if (get_class($throwable) === "ErrorException") {
// this is an Exception
/** @noinspection PhpUndefinedMethodInspection */
$severity = $throwable->getSeverity();
switch($severity) {
case E_ERROR:
case E_USER_ERROR:
$errorType = 'Fatal error';
break;
case E_USER_WARNING:
case E_WARNING:
$errorType = 'Warning';
break;
case E_USER_NOTICE:
case E_NOTICE:
case E_STRICT:
$errorType = 'Notice';
break;
case E_RECOVERABLE_ERROR:
$errorType = 'Catchable fatal error';
break;
case E_USER_DEPRECATED:
case E_DEPRECATED:
$errorType = "Deprecated";
break;
default:
$errorType = 'Unknown error';
}
error_log(sprintf("PHP %s: %s in %s on line %d", $errorType, $throwable->getMessage(), $throwable->getFile(), $throwable->getLine()), 0);
}
else {
// this is an Error.
error_log(sprintf("PHP %s: %s in %s on line %d \nStack trace:\n%s", $errorType, $throwable->getMessage(), $throwable->getFile(), $throwable->getLine(), $throwable->getTraceAsString()), 0);
}
});
return $errorHandler;
}
}
除此之外，还需要将此工厂添加到依赖项中。在文件中：
dependencies.global.php，在factories数组中：
代替
Zend\Stratigility\Middleware\ErrorHandler::class => Container\ErrorHandlerFactory::class,
和
Zend\Stratigility\Middleware\ErrorHandler::class => \App\Factories\ErrorHandlerFactory::class
这几乎应该模拟 php 错误处理程序的日志记录行为。
回答问题 2：
我认为这样做很好，因为 PHP 本身就提供了set_error_handler()，无论如何我们必须自己处理错误，而不是将其传递给 PHP 的错误处理程序。如果我们的 ErrorHandler(listener) 可以复制消息并使用 记录到 PHP 的错误日志中error_log()，那就没问题了。