Symfony Profiler

<?php
/*
* This file is part of the Symfony package.
*
* (c) Fabien Potencier <fabien@symfony.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Symfony\Component\HttpKernel\EventListener;
use Psr\Log\LoggerInterface;
use Symfony\Component\Console\ConsoleEvents;
use Symfony\Component\Console\Event\ConsoleEvent;
use Symfony\Component\Console\Output\ConsoleOutputInterface;
use Symfony\Component\Debug\Exception\FatalThrowableError;
use Symfony\Component\ErrorHandler\ErrorHandler;
use Symfony\Component\EventDispatcher\Event;
use Symfony\Component\EventDispatcher\EventSubscriberInterface;
use Symfony\Component\HttpKernel\Debug\FileLinkFormatter;
use Symfony\Component\HttpKernel\Event\KernelEvent;
use Symfony\Component\HttpKernel\KernelEvents;
/**
* Configures errors and exceptions handlers.
*
* @author Nicolas Grekas <p@tchwork.com>
*
* @final since Symfony 4.4
*/
class DebugHandlersListener implements EventSubscriberInterface
{
private $exceptionHandler;
private $logger;
private $levels;
private $throwAt;
private $scream;
private $fileLinkFormat;
private $scope;
private $firstCall = true;
private $hasTerminatedWithException;
/**
* @param callable|null $exceptionHandler A handler that must support \Throwable instances that will be called on Exception
* @param array|int $levels An array map of E_* to LogLevel::* or an integer bit field of E_* constants
* @param int|null $throwAt Thrown errors in a bit field of E_* constants, or null to keep the current value
* @param bool $scream Enables/disables screaming mode, where even silenced errors are logged
* @param string|FileLinkFormatter|null $fileLinkFormat The format for links to source files
* @param bool $scope Enables/disables scoping mode
*/
public function __construct(callable $exceptionHandler = null, LoggerInterface $logger = null, $levels = E_ALL, ?int $throwAt = E_ALL, bool $scream = true, $fileLinkFormat = null, bool $scope = true)
{
$this->exceptionHandler = $exceptionHandler;
$this->logger = $logger;
$this->levels = null === $levels ? E_ALL : $levels;
$this->throwAt = \is_int($throwAt) ? $throwAt : (null === $throwAt ? null : ($throwAt ? E_ALL : null));
$this->scream = $scream;
$this->fileLinkFormat = $fileLinkFormat;
$this->scope = $scope;
}
/**
* Configures the error handler.
*/
public function configure(Event $event = null)
{
if (!$event instanceof KernelEvent ? !$this->firstCall : !$event->isMasterRequest()) {
return;
}
$this->firstCall = $this->hasTerminatedWithException = false;
$handler = set_exception_handler('var_dump');
$handler = \is_array($handler) ? $handler[0] : null;
restore_exception_handler();
if ($this->logger || null !== $this->throwAt) {
if ($handler instanceof ErrorHandler) {
if ($this->logger) {
$handler->setDefaultLogger($this->logger, $this->levels);
if (\is_array($this->levels)) {
$levels = 0;
foreach ($this->levels as $type => $log) {
$levels |= $type;
}
} else {
$levels = $this->levels;
}
if ($this->scream) {
$handler->screamAt($levels);
}
if ($this->scope) {
$handler->scopeAt($levels & ~E_USER_DEPRECATED & ~E_DEPRECATED);
} else {
$handler->scopeAt(0, true);
}
$this->logger = $this->levels = null;
}
if (null !== $this->throwAt) {
$handler->throwAt($this->throwAt, true);
}
}
}
if (!$this->exceptionHandler) {
if ($event instanceof KernelEvent) {
if (method_exists($kernel = $event->getKernel(), 'terminateWithException')) {
$request = $event->getRequest();
$hasRun = &$this->hasTerminatedWithException;
$this->exceptionHandler = static function (\Throwable $e) use ($kernel, $request, &$hasRun) {
if ($hasRun) {
throw $e;
}
$hasRun = true;
$kernel->terminateWithException($e, $request);
};
}
} elseif ($event instanceof ConsoleEvent && $app = $event->getCommand()->getApplication()) {
$output = $event->getOutput();
if ($output instanceof ConsoleOutputInterface) {
$output = $output->getErrorOutput();
}
$this->exceptionHandler = static function (\Throwable $e) use ($app, $output) {
if (method_exists($app, 'renderThrowable')) {
$app->renderThrowable($e, $output);
} else {
if (!$e instanceof \Exception) {
$e = new FatalThrowableError($e);
}
$app->renderException($e, $output);
}
};
}
}
if ($this->exceptionHandler) {
if ($handler instanceof ErrorHandler) {
$handler->setExceptionHandler($this->exceptionHandler);
}
$this->exceptionHandler = null;
}
}
public static function getSubscribedEvents()
{
$events = [KernelEvents::REQUEST => ['configure', 2048]];
if ('cli' === \PHP_SAPI && \defined('Symfony\Component\Console\ConsoleEvents::COMMAND')) {
$events[ConsoleEvents::COMMAND] = ['configure', 2048];
}
return $events;
}
}

vendor/symfony/symfony/src/Symfony/Component/HttpKernel/EventListener/DebugHandlersListener.php line 67