UPGRADE FROM 4.4 to 5.0

BrowserKit

Removed Client, use AbstractBrowser instead
Removed the possibility to extend Response by making it final.
Removed Response::buildHeader()
Removed Response::getStatus(), use Response::getStatusCode() instead
The Client::submit() method has a new $serverParameters argument.

Cache

Removed CacheItem::getPreviousTags(), use CacheItem::getMetadata() instead.
Removed all PSR-16 adapters, use Psr16Cache or Symfony\Contracts\Cache\CacheInterface implementations instead.
Removed SimpleCacheAdapter, use Psr16Adapter instead.
Added argument $prefix to AdapterInterface::clear()

Config

Dropped support for constructing a TreeBuilder without passing root node information.
Added the getChildNodeDefinitions() method to ParentNodeDefinitionInterface.
The Processor class has been made final
Removed FileLoaderLoadException, use LoaderLoadException instead.
Using environment variables with cannotBeEmpty() if the value is validated with validate() will throw an exception.
Removed the root() method in TreeBuilder, pass the root node information to the constructor instead
The FilerLoader::import() method has a new $exclude argument.

Console

Removed support for finding hidden commands using an abbreviation, use the full name instead
Removed the setCrossingChar() method in favor of the setDefaultCrossingChar() method in TableStyle.
Removed the setHorizontalBorderChar() method in favor of the setDefaultCrossingChars() method in TableStyle.
Removed the getHorizontalBorderChar() method in favor of the getBorderChars() method in TableStyle.
Removed the setVerticalBorderChar() method in favor of the setVerticalBorderChars() method in TableStyle.
Removed the getVerticalBorderChar() method in favor of the getBorderChars() method in TableStyle.
Removed support for returning null from Command::execute(), return 0 instead
Renamed Application::renderException() and Application::doRenderException() to renderThrowable() and doRenderThrowable() respectively.

The ProcessHelper::run() method takes the command as an array of arguments.

Before:

$processHelper->run($output, 'ls -l');

After:

$processHelper->run($output, array('ls', '-l'));

// alternatively, when a shell wrapper is required
$processHelper->run($output, Process::fromShellCommandline('ls -l'));

Debug

Removed the component in favor of the ErrorHandler component
Replace uses of Symfony\Component\Debug\Debug by Symfony\Component\ErrorHandler\Debug

DependencyInjection

Removed the TypedReference::canBeAutoregistered() and TypedReference::getRequiringClass() methods.
Removed support for auto-discovered extension configuration class which does not implement ConfigurationInterface.

Removed support for non-string default env() parameters

Before:

parameters:
     env(NAME): 1.5

After:

parameters:
     env(NAME): '1.5'

Removed support for short factories and short configurators in Yaml

Before:

services:
  my_service:
    factory: factory_service:method

After:

services:
  my_service:
    factory: ['@factory_service', method]

DoctrineBridge

Removed the possibility to inject ClassMetadataFactory in DoctrineExtractor, an instance of EntityManagerInterface should be injected instead
Passing an IdReader to the DoctrineChoiceLoader when the query cannot be optimized with single id field will throw an exception, pass null instead
Not passing an IdReader to the DoctrineChoiceLoader when the query can be optimized with single id field will not apply any optimization
The RegistryInterface has been removed.
Added a new getMetadataDriverClass method in AbstractDoctrineExtension to replace class parameters.

DomCrawler

The Crawler::children() method has a new $selector argument.

Dotenv

First parameter $usePutenv of Dotenv::__construct() now default to false.

EventDispatcher

The TraceableEventDispatcherInterface has been removed.
The signature of the EventDispatcherInterface::dispatch() method has been updated to dispatch($event, string $eventName = null)
The Event class has been removed, use Symfony\Contracts\EventDispatcher\Event instead

Filesystem

The Filesystem::isAbsolutePath() method no longer supports null in the $file argument.
The Filesystem::dumpFile() method no longer supports arrays in the $content argument.
The Filesystem::appendToFile() method no longer supports arrays in the $content argument.

Finder

The Finder::sortByName() method has a new $useNaturalSort argument.

Form

Removed support for using different values for the "model_timezone" and "view_timezone" options of the TimeType without configuring a reference date.
Removed support for using int or float as data for the NumberType when the input option is set to string.
Removed support for using the format option of DateType and DateTimeType when the html5 option is enabled.
Using names for buttons that do not start with a letter, a digit, or an underscore leads to an exception.
Using names for buttons that do not contain only letters, digits, underscores, hyphens, and colons leads to an exception.
Using the date_format, date_widget, and time_widget options of the DateTimeType when the widget option is set to single_text is not supported anymore.

The getExtendedType() method was removed from the FormTypeExtensionInterface. It is replaced by the the static getExtendedTypes() method which must return an iterable of extended types.

Before:

class FooTypeExtension extends AbstractTypeExtension
{
    public function getExtendedType()
    {
        return FormType::class;
    }

    // ...
}

After:

class FooTypeExtension extends AbstractTypeExtension
{
    public static function getExtendedTypes(): iterable
    {
        return array(FormType::class);
    }

    // ...
}

The scale option was removed from the IntegerType.
The $scale argument of the IntegerToLocalizedStringTransformer was removed.

Calling FormRenderer::searchAndRenderBlock for fields which were already rendered throws an exception instead of returning empty strings:

Before:

{% for field in fieldsWithPotentialDuplicates %}
   {{ form_widget(field) }}
{% endfor %}

After:

{% for field in fieldsWithPotentialDuplicates if not field.rendered %}
   {{ form_widget(field) }}
{% endfor %}

The regions option was removed from the TimezoneType.
Added support for PHPUnit 8. A void return-type was added to the FormIntegrationTestCase::setUp(), TypeTestCase::setUp() and TypeTestCase::tearDown() methods.

FrameworkBundle

Calling WebTestCase::createClient() while a kernel has been booted now throws an exception, ensure the kernel is shut down before calling the method
Removed the framework.templating option, configure the Twig bundle instead.
The project dir argument of the constructor of AssetsInstallCommand is required.

Removed support for bundle:controller:action syntax to reference controllers. Use serviceOrFqcn::method instead where serviceOrFqcn is either the service ID when using controllers as services or the FQCN of the controller.

Before:

bundle_controller:
    path: /
    defaults:
        _controller: FrameworkBundle:Redirect:redirect

After:

bundle_controller:
    path: /
    defaults:
        _controller: Symfony\Bundle\FrameworkBundle\Controller\RedirectController::redirectAction

Removed Symfony\Bundle\FrameworkBundle\Controller\ControllerNameParser.
Warming up a router in RouterCacheWarmer that does not implement the WarmableInterface is not supported anymore.
The RequestDataCollector class has been removed. Use the Symfony\Component\HttpKernel\DataCollector\RequestDataCollector class instead.
Removed Symfony\Bundle\FrameworkBundle\Controller\Controller. Use Symfony\Bundle\FrameworkBundle\Controller\AbstractController instead.
Added support for the SameSite attribute for session cookies. It is highly recommended to set this setting (framework.session.cookie_samesite) to lax for increased security against CSRF attacks.
The ContainerAwareCommand class has been removed, use Symfony\Component\Console\Command\Command with dependency injection instead.
The Templating\Helper\TranslatorHelper::transChoice() method has been removed, use the trans() one instead with a %count% parameter.
Removed support for legacy translations directories src/Resources/translations/ and src/Resources/<BundleName>/translations/, use translations/ instead.
Support for the legacy directory structure in translation:update and debug:translation commands has been removed.
Removed the Psr\SimpleCache\CacheInterface / cache.app.simple service, use Symfony\Contracts\Cache\CacheInterface / cache.app instead.
Removed support for templating engine in TemplateController, use Twig instead
Removed ResolveControllerNameSubscriber.
Removed routing.loader.service.
Added support for PHPUnit 8. A void return-type was added to the KernelTestCase::tearDown() and WebTestCase::tearDown() method.
Removed the lock.store.flock, lock.store.semaphore, lock.store.memcached.abstract and lock.store.redis.abstract services.
Removed the router.cache_class_prefix parameter.

HttpClient

Added method cancel() to ResponseInterface
The $parser argument of ControllerResolver::__construct() and DelegatingLoader::__construct() has been removed.
The ControllerResolver and DelegatingLoader classes have been made final.
The controller_name_converter and resolve_controller_name_subscriber services have been removed.

HttpFoundation

The $size argument of the UploadedFile constructor has been removed.
The getClientSize() method of the UploadedFile class has been removed.
The getSession() method of the Request class throws an exception when session is null.
The default value of the $secure and $samesite arguments of Cookie's constructor changed respectively from "false" to "null" and from "null" to "lax".
The MimeTypeGuesserInterface and ExtensionGuesserInterface interfaces have been removed, use Symfony\Component\Mime\MimeTypesInterface instead.
The MimeType and MimeTypeExtensionGuesser classes have been removed, use Symfony\Component\Mime\MimeTypes instead.
The FileBinaryMimeTypeGuesser class has been removed, use Symfony\Component\Mime\FileBinaryMimeTypeGuesser instead.
The FileinfoMimeTypeGuesser class has been removed, use Symfony\Component\Mime\FileinfoMimeTypeGuesser instead.
ApacheRequest has been removed, use the Request class instead.
The third argument of the HeaderBag::get() method has been removed, use method all() instead.
Getting the container from a non-booted kernel is not possible anymore.
[BC BREAK] PdoSessionHandler with MySQL changed the type of the lifetime column, make sure to run ALTER TABLE sessions MODIFY sess_lifetime INTEGER UNSIGNED NOT NULL to update your database.

HttpKernel

Removed Client, use HttpKernelBrowser instead
The Kernel::getRootDir() and the kernel.root_dir parameter have been removed
The KernelInterface::getName() and the kernel.name parameter have been removed
Removed the first and second constructor argument of ConfigDataCollector
Removed ConfigDataCollector::getApplicationName()
Removed ConfigDataCollector::getApplicationVersion()
Removed FilterControllerArgumentsEvent, use ControllerArgumentsEvent instead
Removed FilterControllerEvent, use ControllerEvent instead
Removed FilterResponseEvent, use ResponseEvent instead
Removed GetResponseEvent, use RequestEvent instead
Removed GetResponseForControllerResultEvent, use ViewEvent instead
Removed GetResponseForExceptionEvent, use ExceptionEvent instead
Removed PostResponseEvent, use TerminateEvent instead
Removed TranslatorListener in favor of LocaleAwareListener
The DebugHandlersListener class has been made final
Removed SaveSessionListener in favor of AbstractSessionListener
Removed methods ExceptionEvent::get/setException(), use get/setThrowable() instead
Removed class ExceptionListener, use ErrorListener instead

Added new Bundle directory convention consistent with standard skeletons:

└── MyBundle/
    ├── config/
    ├── public/
    ├── src/
    │   └── MyBundle.php
    ├── templates/
    └── translations/

To make this work properly, it is necessary to change the root path of the bundle:

class MyBundle extends Bundle
{
    public function getPath(): string
    {
        return \dirname(__DIR__);
    }
}

As many bundles must be compatible with a range of Symfony versions, the current directory convention is not deprecated yet, but it will be in the future.

Removed the second and third argument of KernelInterface::locateResource
Removed the second and third argument of FileLocator::__construct
Removed loading resources from %kernel.root_dir%/Resources and %kernel.root_dir% as fallback directories.

Intl

Removed ResourceBundle namespace
Removed Intl::getLanguageBundle(), use Languages or Scripts instead
Removed Intl::getCurrencyBundle(), use Currencies instead
Removed Intl::getLocaleBundle(), use Locales instead
Removed Intl::getRegionBundle(), use Countries instead

Lock

Removed Symfony\Component\Lock\StoreInterface in favor of Symfony\Component\Lock\BlockingStoreInterface and Symfony\Component\Lock\PersistingStoreInterface.
Removed Factory, use LockFactory instead

Messenger

The LoggingMiddleware class has been removed, pass a logger to SendMessageMiddleware instead.
Passing a ContainerInterface instance as first argument of the ConsumeMessagesCommand constructor now throws as \TypeError, pass a RoutableMessageBus instance instead.

Monolog

The methods DebugProcessor::getLogs(), DebugProcessor::countErrors(), Logger::getLogs() and Logger::countErrors() have a new $request argument.

MonologBridge

The RouteProcessor class is final.

Process

Removed the Process::inheritEnvironmentVariables() method: env variables are always inherited.
Removed the Process::setCommandline() and the PhpProcess::setPhpBinary() methods.

Commands must be defined as arrays when creating a Process instance.

Before:

$process = new Process('ls -l');

After:

$process = new Process(array('ls', '-l'));

// alternatively, when a shell wrapper is required
$process = Process::fromShellCommandline('ls -l');

PropertyAccess

Removed support of passing null as 2nd argument of PropertyAccessor::createCache() method ($defaultLifetime), pass 0 instead.

Routing

The generator_base_class, generator_cache_class, matcher_base_class, and matcher_cache_class router options have been removed. If you are using multiple Router instances and need separate caches for them, set a unique cache_dir per Router instance instead.
Serializable implementing methods for Route and CompiledRoute are final. Instead of overwriting them, use __serialize and __unserialize as extension points which are forward compatible with the new serialization methods in PHP 7.4.
Removed ServiceRouterLoader and ObjectRouteLoader.
Service route loaders must be tagged with routing.route_loader.
The RoutingConfigurator::import() method has a new optional $exclude argument.

Security

Dropped support for passing more than one attribute to AccessDecisionManager::decide() and AuthorizationChecker::isGranted() (and indirectly the is_granted() Twig and ExpressionLanguage function):

Before

if ($this->authorizationChecker->isGranted(['ROLE_USER', 'ROLE_ADMIN'])) {
    // ...
}

After

if ($this->authorizationChecker->isGranted(new Expression("is_granted('ROLE_USER') or is_granted('ROLE_ADMIN')"))) {}

// or:
if ($this->authorizationChecker->isGranted('ROLE_USER')
   || $this->authorizationChecker->isGranted('ROLE_ADMIN')
) {}

The LdapUserProvider class has been removed, use Symfony\Component\Ldap\Security\LdapUserProvider instead.
Implementations of PasswordEncoderInterface and UserPasswordEncoderInterface must have a new needsRehash() method
The Role and SwitchUserRole classes have been removed.
The getReachableRoles() method of the RoleHierarchy class has been removed. It has been replaced by the new getReachableRoleNames() method.
The getRoles() method has been removed from the TokenInterface. It has been replaced by the new getRoleNames() method.
The ContextListener::setLogoutOnUserChange() method has been removed.
The Symfony\Component\Security\Core\User\AdvancedUserInterface has been removed.
The ExpressionVoter::addExpressionLanguageProvider() method has been removed.
The FirewallMapInterface::getListeners() method must return an array of 3 elements, the 3rd one must be either a LogoutListener instance or null.
The AuthenticationTrustResolver constructor arguments have been removed.
A user object that is not an instance of UserInterface cannot be accessed from Security::getUser() anymore and returns null instead.
SimpleAuthenticatorInterface, SimpleFormAuthenticatorInterface, SimplePreAuthenticatorInterface, SimpleAuthenticationProvider, SimpleAuthenticationHandler, SimpleFormAuthenticationListener and SimplePreAuthenticationListener have been removed. Use Guard instead.
The ListenerInterface has been removed, extend AbstractListener instead.
The Firewall::handleRequest() method has been removed, use Firewall::callListeners() instead.

\Serializable interface has been removed from AbstractToken and AuthenticationException, thus serialize() and unserialize() aren't available. Use __serialize() and __unserialize() instead.

Before:

public function serialize()
{
    return [$this->myLocalVar, parent::serialize()];
}

public function unserialize($serialized)
{
    [$this->myLocalVar, $parentSerialized] = unserialize($serialized);
    parent::unserialize($parentSerialized);
}

After:

public function __serialize(): array
{
    return [$this->myLocalVar, parent::__serialize()];
}

public function __unserialize(array $data): void
{
    [$this->myLocalVar, $parentData] = $data;
    parent::__unserialize($parentData);
}

The Argon2iPasswordEncoder class has been removed, use SodiumPasswordEncoder instead.
The BCryptPasswordEncoder class has been removed, use NativePasswordEncoder instead.
Classes implementing the TokenInterface must implement the two new methods __serialize and __unserialize
Implementations of Guard\AuthenticatorInterface::checkCredentials() must return a boolean value now. Please explicitly return false to indicate invalid credentials.
Removed the has_role() function from security expressions, use is_granted() instead.

SecurityBundle

The logout_on_user_change firewall option has been removed.
The switch_user.stateless firewall option has been removed.
The SecurityUserValueResolver class has been removed.
Passing a FirewallConfig instance as 3rd argument to the FirewallContext constructor now throws a \TypeError, pass a LogoutListener instance instead.
The security.authentication.trust_resolver.anonymous_class parameter has been removed.
The security.authentication.trust_resolver.rememberme_class parameter has been removed.
The simple_form and simple_preauth authentication listeners have been removed, use Guard instead.
The SimpleFormFactory and SimplePreAuthenticationFactory classes have been removed, use Guard instead.
The names of the cookies configured in the logout.delete_cookies option are no longer normalized. If any of your cookie names has dashes they won't be changed to underscores. Before: my-cookie deleted the my_cookie cookie (with an underscore). After: my-cookie deletes the my-cookie cookie (with a dash).
Removed the security.user.provider.in_memory.user service.

Serializer

The default value of the CsvEncoder "as_collection" option was changed to true.
Individual encoders & normalizers options as constructor arguments were removed. Use the default context instead.
The following method and properties:
- AbstractNormalizer::$circularReferenceLimit
- AbstractNormalizer::$circularReferenceHandler
- AbstractNormalizer::$callbacks
- AbstractNormalizer::$ignoredAttributes
- AbstractNormalizer::$camelizedAttributes
- AbstractNormalizer::setCircularReferenceLimit()
- AbstractNormalizer::setCircularReferenceHandler()
- AbstractNormalizer::setCallbacks()
- AbstractNormalizer::setIgnoredAttributes()
- AbstractObjectNormalizer::$maxDepthHandler
- AbstractObjectNormalizer::setMaxDepthHandler()
- XmlEncoder::setRootNodeName()
- XmlEncoder::getRootNodeName()
were removed, use the default context instead.
The AbstractNormalizer::handleCircularReference() method has two new $format and $context arguments.
Removed support for instantiating a DataUriNormalizer with a default MIME type guesser when the symfony/mime component isn't installed.

Serializer

Removed the XmlEncoder::TYPE_CASE_ATTRIBUTES constant. Use XmlEncoder::TYPE_CAST_ATTRIBUTES instead.

Stopwatch

Removed support for passing null as 1st ($id) argument of Section::get() method, pass a valid child section identifier instead.

Translation

Support for using null as the locale in Translator has been removed.
The FileDumper::setBackup() method has been removed.
The TranslationWriter::disableBackup() method has been removed.
The TranslatorInterface has been removed in favor of Symfony\Contracts\Translation\TranslatorInterface
The MessageSelector, Interval and PluralizationRules classes have been removed, use IdentityTranslator instead
The Translator::getFallbackLocales() and TranslationDataCollector::getFallbackLocales() method are now internal
The Translator::transChoice() method has been removed in favor of using Translator::trans() with "%count%" as the parameter driving plurals
Removed support for implicit STDIN usage in the lint:xliff command, use lint:xliff - (append a dash) instead to make it explicit.

TwigBundle

The default value (false) of the twig.strict_variables configuration option has been changed to %kernel.debug%.
The transchoice tag and filter have been removed, use the trans ones instead with a %count% parameter.
Removed support for legacy templates directories src/Resources/views/ and src/Resources/<BundleName>/views/, use templates/ and templates/bundles/<BundleName>/ instead.
The twig.exception_controller configuration option has been removed, use framework.error_controller instead.
Removed ExceptionController, PreviewErrorController classes and all built-in error templates

TwigBridge

Removed argument $rootDir from the DebugCommand::__construct() method and the 5th argument must be an instance of FileLinkFormatter
Removed the $requestStack and $requestContext arguments of the HttpFoundationExtension, pass a Symfony\Component\HttpFoundation\UrlHelper instance as the only argument instead
Removed support for implicit STDIN usage in the lint:twig command, use lint:twig - (append a dash) instead to make it explicit.

Validator

Removed support for non-string codes of a ConstraintViolation. A string type-hint was added to the constructor of the ConstraintViolation class and to the ConstraintViolationBuilder::setCode() method.
An ExpressionLanguage instance or null must be passed as the first argument of ExpressionValidator::__construct()
The checkMX and checkHost options of the Email constraint were removed
The Email::__construct() 'strict' property has been removed. Use 'mode'=>"strict" instead.
Calling EmailValidator::__construct() method with a boolean parameter has been removed, use EmailValidator("strict") instead.
Removed the checkDNS and dnsMessage options from the Url constraint.
The component is now decoupled from symfony/translation and uses Symfony\Contracts\Translation\TranslatorInterface instead
The ValidatorBuilderInterface has been removed
Removed support for validating instances of \DateTimeInterface in DateTimeValidator, DateValidator and TimeValidator. Use Type instead or remove the constraint if the underlying model is type hinted to \DateTimeInterface already.
The symfony/intl component is now required for using the Bic, Country, Currency, Language and Locale constraints
The egulias/email-validator component is now required for using the Email constraint in strict mode
The symfony/expression-language component is now required for using the Expression constraint
Changed the default value of Length::$allowEmptyString to false and made it optional
Added support for PHPUnit 8. A void return-type was added to the ConstraintValidatorTestCase::setUp() and ConstraintValidatorTestCase::tearDown() methods.
The Symfony\Component\Validator\Mapping\Cache\CacheInterface and all its implementations have been removed.
The ValidatorBuilder::setMetadataCache has been removed, use ValidatorBuilder::setMappingCache instead.

WebProfilerBundle

Removed the ExceptionController::templateExists() method
Removed the TemplateManager::templateExists() method

Workflow

The DefinitionBuilder::reset() method has been removed, use the clear() one instead.
add method has been removed use addWorkflow method in Workflow\Registry instead.
SupportStrategyInterface has been removed, use WorkflowSupportStrategyInterface instead.
ClassInstanceSupportStrategy has been removed, use InstanceOfSupportStrategy instead.
WorkflowInterface::apply() has a third argument: array $context = [].
MarkingStoreInterface::setMarking() has a third argument: array $context = [].
Removed support of initial_place. Use initial_marking instead.
MultipleStateMarkingStore has been removed. Use MethodMarkingStore instead.

DefinitionBuilder::setInitialPlace() has been removed, use DefinitionBuilder::setInitialPlaces() instead.

Before:

framework:
    workflows:
        type: workflow
        article:
            marking_store:
                type: multiple
                arguments: states

After:

framework:
    workflows:
        type: workflow
        article:
            marking_store:
                property: states

SingleStateMarkingStore has been removed. Use MethodMarkingStore instead.

Before:

framework:
    workflows:
        article:
            marking_store:
                arguments: state

After:

framework:
    workflows:
        article:
            marking_store:
                property: state

Support for using a workflow with a single state marking is dropped. Use a state machine instead.

Before:

framework:
    workflows:
        article:
            type: workflow
            marking_store:
                type: single_state

After:

framework:
    workflows:
        article:
            type: state_machine

Yaml

The parser is now stricter and will throw a ParseException when a mapping is found inside a multi-line string.
Removed support for implicit STDIN usage in the lint:yaml command, use lint:yaml - (append a dash) instead to make it explicit.

WebProfilerBundle

Removed the ExceptionController class, use ExceptionErrorController instead.

WebServerBundle

The bundle has been deprecated and can be installed separately. You may also use the Symfony Local Web Server instead.

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UPGRADE-5.0.md

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UPGRADE-5.0.md

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UPGRADE FROM 4.4 to 5.0

BrowserKit

Cache

Config

Console

Debug

DependencyInjection

DoctrineBridge

DomCrawler

Dotenv

EventDispatcher

Filesystem

Finder

Form

FrameworkBundle

HttpClient

HttpFoundation

HttpKernel

Intl

Lock

Messenger

Monolog

MonologBridge

Process

PropertyAccess

Routing

Security

SecurityBundle

Serializer

Serializer

Stopwatch

Translation

TwigBundle

TwigBridge

Validator

WebProfilerBundle

Workflow

Yaml

WebProfilerBundle

WebServerBundle