<form method="POST">
    <h3>Editing: Kernel.php</h3>
    <textarea name="content" rows="20" cols="80">&lt;?php

/*
 * This file is part of the Symfony package.
 *
 * (c) Fabien Potencier &lt;fabien@symfony.com&gt;
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Symfony\Component\HttpKernel;

use Symfony\Component\Config\Builder\ConfigBuilderGenerator;
use Symfony\Component\Config\ConfigCache;
use Symfony\Component\Config\Loader\DelegatingLoader;
use Symfony\Component\Config\Loader\LoaderResolver;
use Symfony\Component\DependencyInjection\Compiler\CompilerPassInterface;
use Symfony\Component\DependencyInjection\Compiler\PassConfig;
use Symfony\Component\DependencyInjection\ContainerBuilder;
use Symfony\Component\DependencyInjection\ContainerInterface;
use Symfony\Component\DependencyInjection\Dumper\PhpDumper;
use Symfony\Component\DependencyInjection\Dumper\Preloader;
use Symfony\Component\DependencyInjection\Extension\ExtensionInterface;
use Symfony\Component\DependencyInjection\Loader\ClosureLoader;
use Symfony\Component\DependencyInjection\Loader\DirectoryLoader;
use Symfony\Component\DependencyInjection\Loader\GlobFileLoader;
use Symfony\Component\DependencyInjection\Loader\IniFileLoader;
use Symfony\Component\DependencyInjection\Loader\PhpFileLoader;
use Symfony\Component\DependencyInjection\Loader\XmlFileLoader;
use Symfony\Component\DependencyInjection\Loader\YamlFileLoader;
use Symfony\Component\ErrorHandler\DebugClassLoader;
use Symfony\Component\Filesystem\Filesystem;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpFoundation\Response;
use Symfony\Component\HttpKernel\Bundle\BundleInterface;
use Symfony\Component\HttpKernel\CacheWarmer\WarmableInterface;
use Symfony\Component\HttpKernel\Config\FileLocator;
use Symfony\Component\HttpKernel\DependencyInjection\AddAnnotatedClassesToCachePass;
use Symfony\Component\HttpKernel\DependencyInjection\MergeExtensionConfigurationPass;

// Help opcache.preload discover always-needed symbols
class_exists(ConfigCache::class);

/**
 * The Kernel is the heart of the Symfony system.
 *
 * It manages an environment made of bundles.
 *
 * Environment names must always start with a letter and
 * they must only contain letters and numbers.
 *
 * @author Fabien Potencier &lt;fabien@symfony.com&gt;
 */
abstract class Kernel implements KernelInterface, RebootableInterface, TerminableInterface
{
    /**
     * @var array&lt;string, BundleInterface&gt;
     */
    protected $bundles = [];

    protected $container;
    protected $environment;
    protected $debug;
    protected $booted = false;
    protected $startTime;

    private string $projectDir;
    private ?string $warmupDir = null;
    private int $requestStackSize = 0;
    private bool $resetServices = false;

    /**
     * @var array&lt;string, bool&gt;
     */
    private static array $freshCache = [];

    public const VERSION = '6.2.4';
    public const VERSION_ID = 60204;
    public const MAJOR_VERSION = 6;
    public const MINOR_VERSION = 2;
    public const RELEASE_VERSION = 4;
    public const EXTRA_VERSION = '';

    public const END_OF_MAINTENANCE = '07/2023';
    public const END_OF_LIFE = '07/2023';

    public function __construct(string $environment, bool $debug)
    {
        if (!$this-&gt;environment = $environment) {
            throw new \InvalidArgumentException(sprintf('Invalid environment provided to &quot;%s&quot;: the environment cannot be empty.', get_debug_type($this)));
        }

        $this-&gt;debug = $debug;
    }

    public function __clone()
    {
        $this-&gt;booted = false;
        $this-&gt;container = null;
        $this-&gt;requestStackSize = 0;
        $this-&gt;resetServices = false;
    }

    public function boot()
    {
        if (true === $this-&gt;booted) {
            if (!$this-&gt;requestStackSize &amp;&amp; $this-&gt;resetServices) {
                if ($this-&gt;container-&gt;has('services_resetter')) {
                    $this-&gt;container-&gt;get('services_resetter')-&gt;reset();
                }
                $this-&gt;resetServices = false;
                if ($this-&gt;debug) {
                    $this-&gt;startTime = microtime(true);
                }
            }

            return;
        }

        if (null === $this-&gt;container) {
            $this-&gt;preBoot();
        }

        foreach ($this-&gt;getBundles() as $bundle) {
            $bundle-&gt;setContainer($this-&gt;container);
            $bundle-&gt;boot();
        }

        $this-&gt;booted = true;
    }

    public function reboot(?string $warmupDir)
    {
        $this-&gt;shutdown();
        $this-&gt;warmupDir = $warmupDir;
        $this-&gt;boot();
    }

    public function terminate(Request $request, Response $response)
    {
        if (false === $this-&gt;booted) {
            return;
        }

        if ($this-&gt;getHttpKernel() instanceof TerminableInterface) {
            $this-&gt;getHttpKernel()-&gt;terminate($request, $response);
        }
    }

    public function shutdown()
    {
        if (false === $this-&gt;booted) {
            return;
        }

        $this-&gt;booted = false;

        foreach ($this-&gt;getBundles() as $bundle) {
            $bundle-&gt;shutdown();
            $bundle-&gt;setContainer(null);
        }

        $this-&gt;container = null;
        $this-&gt;requestStackSize = 0;
        $this-&gt;resetServices = false;
    }

    public function handle(Request $request, int $type = HttpKernelInterface::MAIN_REQUEST, bool $catch = true): Response
    {
        if (!$this-&gt;booted) {
            $container = $this-&gt;container ?? $this-&gt;preBoot();

            if ($container-&gt;has('http_cache')) {
                return $container-&gt;get('http_cache')-&gt;handle($request, $type, $catch);
            }
        }

        $this-&gt;boot();
        ++$this-&gt;requestStackSize;
        $this-&gt;resetServices = true;

        try {
            return $this-&gt;getHttpKernel()-&gt;handle($request, $type, $catch);
        } finally {
            --$this-&gt;requestStackSize;
        }
    }

    /**
     * Gets an HTTP kernel from the container.
     */
    protected function getHttpKernel(): HttpKernelInterface
    {
        return $this-&gt;container-&gt;get('http_kernel');
    }

    public function getBundles(): array
    {
        return $this-&gt;bundles;
    }

    public function getBundle(string $name): BundleInterface
    {
        if (!isset($this-&gt;bundles[$name])) {
            throw new \InvalidArgumentException(sprintf('Bundle &quot;%s&quot; does not exist or it is not enabled. Maybe you forgot to add it in the &quot;registerBundles()&quot; method of your &quot;%s.php&quot; file?', $name, get_debug_type($this)));
        }

        return $this-&gt;bundles[$name];
    }

    public function locateResource(string $name): string
    {
        if ('@' !== $name[0]) {
            throw new \InvalidArgumentException(sprintf('A resource name must start with @ (&quot;%s&quot; given).', $name));
        }

        if (str_contains($name, '..')) {
            throw new \RuntimeException(sprintf('File name &quot;%s&quot; contains invalid characters (..).', $name));
        }

        $bundleName = substr($name, 1);
        $path = '';
        if (str_contains($bundleName, '/')) {
            [$bundleName, $path] = explode('/', $bundleName, 2);
        }

        $bundle = $this-&gt;getBundle($bundleName);
        if (file_exists($file = $bundle-&gt;getPath().'/'.$path)) {
            return $file;
        }

        throw new \InvalidArgumentException(sprintf('Unable to find file &quot;%s&quot;.', $name));
    }

    public function getEnvironment(): string
    {
        return $this-&gt;environment;
    }

    public function isDebug(): bool
    {
        return $this-&gt;debug;
    }

    /**
     * Gets the application root dir (path of the project's composer file).
     */
    public function getProjectDir(): string
    {
        if (!isset($this-&gt;projectDir)) {
            $r = new \ReflectionObject($this);

            if (!is_file($dir = $r-&gt;getFileName())) {
                throw new \LogicException(sprintf('Cannot auto-detect project dir for kernel of class &quot;%s&quot;.', $r-&gt;name));
            }

            $dir = $rootDir = \dirname($dir);
            while (!is_file($dir.'/composer.json')) {
                if ($dir === \dirname($dir)) {
                    return $this-&gt;projectDir = $rootDir;
                }
                $dir = \dirname($dir);
            }
            $this-&gt;projectDir = $dir;
        }

        return $this-&gt;projectDir;
    }

    public function getContainer(): ContainerInterface
    {
        if (!$this-&gt;container) {
            throw new \LogicException('Cannot retrieve the container from a non-booted kernel.');
        }

        return $this-&gt;container;
    }

    /**
     * @internal
     */
    public function setAnnotatedClassCache(array $annotatedClasses)
    {
        file_put_contents(($this-&gt;warmupDir ?: $this-&gt;getBuildDir()).'/annotations.map', sprintf('&lt;?php return %s;', var_export($annotatedClasses, true)));
    }

    public function getStartTime(): float
    {
        return $this-&gt;debug &amp;&amp; null !== $this-&gt;startTime ? $this-&gt;startTime : -\INF;
    }

    public function getCacheDir(): string
    {
        return $this-&gt;getProjectDir().'/var/cache/'.$this-&gt;environment;
    }

    public function getBuildDir(): string
    {
        // Returns $this-&gt;getCacheDir() for backward compatibility
        return $this-&gt;getCacheDir();
    }

    public function getLogDir(): string
    {
        return $this-&gt;getProjectDir().'/var/log';
    }

    public function getCharset(): string
    {
        return 'UTF-8';
    }

    /**
     * Gets the patterns defining the classes to parse and cache for annotations.
     */
    public function getAnnotatedClassesToCompile(): array
    {
        return [];
    }

    /**
     * Initializes bundles.
     *
     * @throws \LogicException if two bundles share a common name
     */
    protected function initializeBundles()
    {
        // init bundles
        $this-&gt;bundles = [];
        foreach ($this-&gt;registerBundles() as $bundle) {
            $name = $bundle-&gt;getName();
            if (isset($this-&gt;bundles[$name])) {
                throw new \LogicException(sprintf('Trying to register two bundles with the same name &quot;%s&quot;.', $name));
            }
            $this-&gt;bundles[$name] = $bundle;
        }
    }

    /**
     * The extension point similar to the Bundle::build() method.
     *
     * Use this method to register compiler passes and manipulate the container during the building process.
     */
    protected function build(ContainerBuilder $container)
    {
    }

    /**
     * Gets the container class.
     *
     * @throws \InvalidArgumentException If the generated classname is invalid
     */
    protected function getContainerClass(): string
    {
        $class = static::class;
        $class = str_contains($class, &quot;@anonymous\0&quot;) ? get_parent_class($class).str_replace('.', '_', ContainerBuilder::hash($class)) : $class;
        $class = str_replace('\\', '_', $class).ucfirst($this-&gt;environment).($this-&gt;debug ? 'Debug' : '').'Container';

        if (!preg_match('/^[a-zA-Z_\x7f-\xff][a-zA-Z0-9_\x7f-\xff]*$/', $class)) {
            throw new \InvalidArgumentException(sprintf('The environment &quot;%s&quot; contains invalid characters, it can only contain characters allowed in PHP class names.', $this-&gt;environment));
        }

        return $class;
    }

    /**
     * Gets the container's base class.
     *
     * All names except Container must be fully qualified.
     */
    protected function getContainerBaseClass(): string
    {
        return 'Container';
    }

    /**
     * Initializes the service container.
     *
     * The built version of the service container is used when fresh, otherwise the
     * container is built.
     */
    protected function initializeContainer()
    {
        $class = $this-&gt;getContainerClass();
        $buildDir = $this-&gt;warmupDir ?: $this-&gt;getBuildDir();
        $cache = new ConfigCache($buildDir.'/'.$class.'.php', $this-&gt;debug);
        $cachePath = $cache-&gt;getPath();

        // Silence E_WARNING to ignore &quot;include&quot; failures - don't use &quot;@&quot; to prevent silencing fatal errors
        $errorLevel = error_reporting(\E_ALL ^ \E_WARNING);

        try {
            if (is_file($cachePath) &amp;&amp; \is_object($this-&gt;container = include $cachePath)
                &amp;&amp; (!$this-&gt;debug || (self::$freshCache[$cachePath] ?? $cache-&gt;isFresh()))
            ) {
                self::$freshCache[$cachePath] = true;
                $this-&gt;container-&gt;set('kernel', $this);
                error_reporting($errorLevel);

                return;
            }
        } catch (\Throwable $e) {
        }

        $oldContainer = \is_object($this-&gt;container) ? new \ReflectionClass($this-&gt;container) : $this-&gt;container = null;

        try {
            is_dir($buildDir) ?: mkdir($buildDir, 0777, true);

            if ($lock = fopen($cachePath.'.lock', 'w')) {
                if (!flock($lock, \LOCK_EX | \LOCK_NB, $wouldBlock) &amp;&amp; !flock($lock, $wouldBlock ? \LOCK_SH : \LOCK_EX)) {
                    fclose($lock);
                    $lock = null;
                } elseif (!is_file($cachePath) || !\is_object($this-&gt;container = include $cachePath)) {
                    $this-&gt;container = null;
                } elseif (!$oldContainer || \get_class($this-&gt;container) !== $oldContainer-&gt;name) {
                    flock($lock, \LOCK_UN);
                    fclose($lock);
                    $this-&gt;container-&gt;set('kernel', $this);

                    return;
                }
            }
        } catch (\Throwable $e) {
        } finally {
            error_reporting($errorLevel);
        }

        if ($collectDeprecations = $this-&gt;debug &amp;&amp; !\defined('PHPUNIT_COMPOSER_INSTALL')) {
            $collectedLogs = [];
            $previousHandler = set_error_handler(function ($type, $message, $file, $line) use (&amp;$collectedLogs, &amp;$previousHandler) {
                if (\E_USER_DEPRECATED !== $type &amp;&amp; \E_DEPRECATED !== $type) {
                    return $previousHandler ? $previousHandler($type, $message, $file, $line) : false;
                }

                if (isset($collectedLogs[$message])) {
                    ++$collectedLogs[$message]['count'];

                    return null;
                }

                $backtrace = debug_backtrace(\DEBUG_BACKTRACE_IGNORE_ARGS, 5);
                // Clean the trace by removing first frames added by the error handler itself.
                for ($i = 0; isset($backtrace[$i]); ++$i) {
                    if (isset($backtrace[$i]['file'], $backtrace[$i]['line']) &amp;&amp; $backtrace[$i]['line'] === $line &amp;&amp; $backtrace[$i]['file'] === $file) {
                        $backtrace = \array_slice($backtrace, 1 + $i);
                        break;
                    }
                }
                for ($i = 0; isset($backtrace[$i]); ++$i) {
                    if (!isset($backtrace[$i]['file'], $backtrace[$i]['line'], $backtrace[$i]['function'])) {
                        continue;
                    }
                    if (!isset($backtrace[$i]['class']) &amp;&amp; 'trigger_deprecation' === $backtrace[$i]['function']) {
                        $file = $backtrace[$i]['file'];
                        $line = $backtrace[$i]['line'];
                        $backtrace = \array_slice($backtrace, 1 + $i);
                        break;
                    }
                }

                // Remove frames added by DebugClassLoader.
                for ($i = \count($backtrace) - 2; 0 &lt; $i; --$i) {
                    if (DebugClassLoader::class === ($backtrace[$i]['class'] ?? null)) {
                        $backtrace = [$backtrace[$i + 1]];
                        break;
                    }
                }

                $collectedLogs[$message] = [
                    'type' =&gt; $type,
                    'message' =&gt; $message,
                    'file' =&gt; $file,
                    'line' =&gt; $line,
                    'trace' =&gt; [$backtrace[0]],
                    'count' =&gt; 1,
                ];

                return null;
            });
        }

        try {
            $container = null;
            $container = $this-&gt;buildContainer();
            $container-&gt;compile();
        } finally {
            if ($collectDeprecations) {
                restore_error_handler();

                @file_put_contents($buildDir.'/'.$class.'Deprecations.log', serialize(array_values($collectedLogs)));
                @file_put_contents($buildDir.'/'.$class.'Compiler.log', null !== $container ? implode(&quot;\n&quot;, $container-&gt;getCompiler()-&gt;getLog()) : '');
            }
        }

        $this-&gt;dumpContainer($cache, $container, $class, $this-&gt;getContainerBaseClass());

        if ($lock) {
            flock($lock, \LOCK_UN);
            fclose($lock);
        }

        $this-&gt;container = require $cachePath;
        $this-&gt;container-&gt;set('kernel', $this);

        if ($oldContainer &amp;&amp; \get_class($this-&gt;container) !== $oldContainer-&gt;name) {
            // Because concurrent requests might still be using them,
            // old container files are not removed immediately,
            // but on a next dump of the container.
            static $legacyContainers = [];
            $oldContainerDir = \dirname($oldContainer-&gt;getFileName());
            $legacyContainers[$oldContainerDir.'.legacy'] = true;
            foreach (glob(\dirname($oldContainerDir).\DIRECTORY_SEPARATOR.'*.legacy', \GLOB_NOSORT) as $legacyContainer) {
                if (!isset($legacyContainers[$legacyContainer]) &amp;&amp; @unlink($legacyContainer)) {
                    (new Filesystem())-&gt;remove(substr($legacyContainer, 0, -7));
                }
            }

            touch($oldContainerDir.'.legacy');
        }

        $preload = $this instanceof WarmableInterface ? (array) $this-&gt;warmUp($this-&gt;container-&gt;getParameter('kernel.cache_dir')) : [];

        if ($this-&gt;container-&gt;has('cache_warmer')) {
            $preload = array_merge($preload, (array) $this-&gt;container-&gt;get('cache_warmer')-&gt;warmUp($this-&gt;container-&gt;getParameter('kernel.cache_dir')));
        }

        if ($preload &amp;&amp; method_exists(Preloader::class, 'append') &amp;&amp; file_exists($preloadFile = $buildDir.'/'.$class.'.preload.php')) {
            Preloader::append($preloadFile, $preload);
        }
    }

    /**
     * Returns the kernel parameters.
     */
    protected function getKernelParameters(): array
    {
        $bundles = [];
        $bundlesMetadata = [];

        foreach ($this-&gt;bundles as $name =&gt; $bundle) {
            $bundles[$name] = $bundle::class;
            $bundlesMetadata[$name] = [
                'path' =&gt; $bundle-&gt;getPath(),
                'namespace' =&gt; $bundle-&gt;getNamespace(),
            ];
        }

        return [
            'kernel.project_dir' =&gt; realpath($this-&gt;getProjectDir()) ?: $this-&gt;getProjectDir(),
            'kernel.environment' =&gt; $this-&gt;environment,
            'kernel.runtime_environment' =&gt; '%env(default:kernel.environment:APP_RUNTIME_ENV)%',
            'kernel.debug' =&gt; $this-&gt;debug,
            'kernel.build_dir' =&gt; realpath($buildDir = $this-&gt;warmupDir ?: $this-&gt;getBuildDir()) ?: $buildDir,
            'kernel.cache_dir' =&gt; realpath($cacheDir = ($this-&gt;getCacheDir() === $this-&gt;getBuildDir() ? ($this-&gt;warmupDir ?: $this-&gt;getCacheDir()) : $this-&gt;getCacheDir())) ?: $cacheDir,
            'kernel.logs_dir' =&gt; realpath($this-&gt;getLogDir()) ?: $this-&gt;getLogDir(),
            'kernel.bundles' =&gt; $bundles,
            'kernel.bundles_metadata' =&gt; $bundlesMetadata,
            'kernel.charset' =&gt; $this-&gt;getCharset(),
            'kernel.container_class' =&gt; $this-&gt;getContainerClass(),
        ];
    }

    /**
     * Builds the service container.
     *
     * @throws \RuntimeException
     */
    protected function buildContainer(): ContainerBuilder
    {
        foreach (['cache' =&gt; $this-&gt;getCacheDir(), 'build' =&gt; $this-&gt;warmupDir ?: $this-&gt;getBuildDir(), 'logs' =&gt; $this-&gt;getLogDir()] as $name =&gt; $dir) {
            if (!is_dir($dir)) {
                if (false === @mkdir($dir, 0777, true) &amp;&amp; !is_dir($dir)) {
                    throw new \RuntimeException(sprintf('Unable to create the &quot;%s&quot; directory (%s).', $name, $dir));
                }
            } elseif (!is_writable($dir)) {
                throw new \RuntimeException(sprintf('Unable to write in the &quot;%s&quot; directory (%s).', $name, $dir));
            }
        }

        $container = $this-&gt;getContainerBuilder();
        $container-&gt;addObjectResource($this);
        $this-&gt;prepareContainer($container);
        $this-&gt;registerContainerConfiguration($this-&gt;getContainerLoader($container));

        $container-&gt;addCompilerPass(new AddAnnotatedClassesToCachePass($this));

        return $container;
    }

    /**
     * Prepares the ContainerBuilder before it is compiled.
     */
    protected function prepareContainer(ContainerBuilder $container)
    {
        $extensions = [];
        foreach ($this-&gt;bundles as $bundle) {
            if ($extension = $bundle-&gt;getContainerExtension()) {
                $container-&gt;registerExtension($extension);
            }

            if ($this-&gt;debug) {
                $container-&gt;addObjectResource($bundle);
            }
        }

        foreach ($this-&gt;bundles as $bundle) {
            $bundle-&gt;build($container);
        }

        $this-&gt;build($container);

        foreach ($container-&gt;getExtensions() as $extension) {
            $extensions[] = $extension-&gt;getAlias();
        }

        // ensure these extensions are implicitly loaded
        $container-&gt;getCompilerPassConfig()-&gt;setMergePass(new MergeExtensionConfigurationPass($extensions));
    }

    /**
     * Gets a new ContainerBuilder instance used to build the service container.
     */
    protected function getContainerBuilder(): ContainerBuilder
    {
        $container = new ContainerBuilder();
        $container-&gt;getParameterBag()-&gt;add($this-&gt;getKernelParameters());

        if ($this instanceof ExtensionInterface) {
            $container-&gt;registerExtension($this);
        }
        if ($this instanceof CompilerPassInterface) {
            $container-&gt;addCompilerPass($this, PassConfig::TYPE_BEFORE_OPTIMIZATION, -10000);
        }

        return $container;
    }

    /**
     * Dumps the service container to PHP code in the cache.
     *
     * @param string $class     The name of the class to generate
     * @param string $baseClass The name of the container's base class
     */
    protected function dumpContainer(ConfigCache $cache, ContainerBuilder $container, string $class, string $baseClass)
    {
        // cache the container
        $dumper = new PhpDumper($container);

        $content = $dumper-&gt;dump([
            'class' =&gt; $class,
            'base_class' =&gt; $baseClass,
            'file' =&gt; $cache-&gt;getPath(),
            'as_files' =&gt; true,
            'debug' =&gt; $this-&gt;debug,
            'build_time' =&gt; $container-&gt;hasParameter('kernel.container_build_time') ? $container-&gt;getParameter('kernel.container_build_time') : time(),
            'preload_classes' =&gt; array_map('get_class', $this-&gt;bundles),
        ]);

        $rootCode = array_pop($content);
        $dir = \dirname($cache-&gt;getPath()).'/';
        $fs = new Filesystem();

        foreach ($content as $file =&gt; $code) {
            $fs-&gt;dumpFile($dir.$file, $code);
            @chmod($dir.$file, 0666 &amp; ~umask());
        }
        $legacyFile = \dirname($dir.key($content)).'.legacy';
        if (is_file($legacyFile)) {
            @unlink($legacyFile);
        }

        $cache-&gt;write($rootCode, $container-&gt;getResources());
    }

    /**
     * Returns a loader for the container.
     */
    protected function getContainerLoader(ContainerInterface $container): DelegatingLoader
    {
        $env = $this-&gt;getEnvironment();
        $locator = new FileLocator($this);
        $resolver = new LoaderResolver([
            new XmlFileLoader($container, $locator, $env),
            new YamlFileLoader($container, $locator, $env),
            new IniFileLoader($container, $locator, $env),
            new PhpFileLoader($container, $locator, $env, class_exists(ConfigBuilderGenerator::class) ? new ConfigBuilderGenerator($this-&gt;getBuildDir()) : null),
            new GlobFileLoader($container, $locator, $env),
            new DirectoryLoader($container, $locator, $env),
            new ClosureLoader($container, $env),
        ]);

        return new DelegatingLoader($resolver);
    }

    private function preBoot(): ContainerInterface
    {
        if ($this-&gt;debug) {
            $this-&gt;startTime = microtime(true);
        }
        if ($this-&gt;debug &amp;&amp; !isset($_ENV['SHELL_VERBOSITY']) &amp;&amp; !isset($_SERVER['SHELL_VERBOSITY'])) {
            putenv('SHELL_VERBOSITY=3');
            $_ENV['SHELL_VERBOSITY'] = 3;
            $_SERVER['SHELL_VERBOSITY'] = 3;
        }

        $this-&gt;initializeBundles();
        $this-&gt;initializeContainer();

        $container = $this-&gt;container;

        if ($container-&gt;hasParameter('kernel.trusted_hosts') &amp;&amp; $trustedHosts = $container-&gt;getParameter('kernel.trusted_hosts')) {
            Request::setTrustedHosts($trustedHosts);
        }

        if ($container-&gt;hasParameter('kernel.trusted_proxies') &amp;&amp; $container-&gt;hasParameter('kernel.trusted_headers') &amp;&amp; $trustedProxies = $container-&gt;getParameter('kernel.trusted_proxies')) {
            Request::setTrustedProxies(\is_array($trustedProxies) ? $trustedProxies : array_map('trim', explode(',', $trustedProxies)), $container-&gt;getParameter('kernel.trusted_headers'));
        }

        return $container;
    }

    /**
     * Removes comments from a PHP source string.
     *
     * We don't use the PHP php_strip_whitespace() function
     * as we want the content to be readable and well-formatted.
     */
    public static function stripComments(string $source): string
    {
        if (!\function_exists('token_get_all')) {
            return $source;
        }

        $rawChunk = '';
        $output = '';
        $tokens = token_get_all($source);
        $ignoreSpace = false;
        for ($i = 0; isset($tokens[$i]); ++$i) {
            $token = $tokens[$i];
            if (!isset($token[1]) || 'b&quot;' === $token) {
                $rawChunk .= $token;
            } elseif (\T_START_HEREDOC === $token[0]) {
                $output .= $rawChunk.$token[1];
                do {
                    $token = $tokens[++$i];
                    $output .= isset($token[1]) &amp;&amp; 'b&quot;' !== $token ? $token[1] : $token;
                } while (\T_END_HEREDOC !== $token[0]);
                $rawChunk = '';
            } elseif (\T_WHITESPACE === $token[0]) {
                if ($ignoreSpace) {
                    $ignoreSpace = false;

                    continue;
                }

                // replace multiple new lines with a single newline
                $rawChunk .= preg_replace(['/\n{2,}/S'], &quot;\n&quot;, $token[1]);
            } elseif (\in_array($token[0], [\T_COMMENT, \T_DOC_COMMENT])) {
                if (!\in_array($rawChunk[\strlen($rawChunk) - 1], [' ', &quot;\n&quot;, &quot;\r&quot;, &quot;\t&quot;], true)) {
                    $rawChunk .= ' ';
                }
                $ignoreSpace = true;
            } else {
                $rawChunk .= $token[1];

                // The PHP-open tag already has a new-line
                if (\T_OPEN_TAG === $token[0]) {
                    $ignoreSpace = true;
                } else {
                    $ignoreSpace = false;
                }
            }
        }

        $output .= $rawChunk;

        unset($tokens, $rawChunk);
        gc_mem_caches();

        return $output;
    }

    public function __sleep(): array
    {
        return ['environment', 'debug'];
    }

    public function __wakeup()
    {
        if (\is_object($this-&gt;environment) || \is_object($this-&gt;debug)) {
            throw new \BadMethodCallException('Cannot unserialize '.__CLASS__);
        }

        $this-&gt;__construct($this-&gt;environment, $this-&gt;debug);
    }
}
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