UPGRADE FROM 5.0 to 5.1

Config

The signature of method NodeDefinition::setDeprecated() has been updated to NodeDefinition::setDeprecated(string $package, string $version, string $message).
The signature of method BaseNode::setDeprecated() has been updated to BaseNode::setDeprecated(string $package, string $version, string $message).
Passing a null message to BaseNode::setDeprecated() to un-deprecate a node is deprecated
Deprecated BaseNode::getDeprecationMessage(), use BaseNode::getDeprecation() instead

Console

Command::setHidden() is final since Symfony 5.1

DependencyInjection

The signature of method Definition::setDeprecated() has been updated to Definition::setDeprecation(string $package, string $version, string $message).
The signature of method Alias::setDeprecated() has been updated to Alias::setDeprecation(string $package, string $version, string $message).
The signature of method DeprecateTrait::deprecate() has been updated to DeprecateTrait::deprecation(string $package, string $version, string $message).
Deprecated the Psr\Container\ContainerInterface and Symfony\Component\DependencyInjection\ContainerInterface aliases of the service_container service, configure them explicitly instead.
Deprecated Definition::getDeprecationMessage(), use Definition::getDeprecation() instead.
Deprecated Alias::getDeprecationMessage(), use Alias::getDeprecation() instead.
The inline() function from the PHP-DSL has been deprecated, use inline_service() instead
The ref() function from the PHP-DSL has been deprecated, use service() instead

Dotenv

Deprecated passing $usePutenv argument to Dotenv's constructor, use Dotenv::usePutenv() instead.

EventDispatcher

Deprecated LegacyEventDispatcherProxy. Use the event dispatcher without the proxy.

Form

Not configuring the rounding_mode option of the PercentType is deprecated. It will default to \NumberFormatter::ROUND_HALFUP in Symfony 6.
Not passing a rounding mode to the constructor of PercentToLocalizedStringTransformer is deprecated. It will default to \NumberFormatter::ROUND_HALFUP in Symfony 6.
Implementing the FormConfigInterface without implementing the getIsEmptyCallback() method is deprecated. The method will be added to the interface in 6.0.
Implementing the FormConfigBuilderInterface without implementing the setIsEmptyCallback() method is deprecated. The method will be added to the interface in 6.0.
Added argument callable|null $filter to ChoiceListFactoryInterface::createListFromChoices() and createListFromLoader() - not defining them is deprecated.
Using Symfony\Component\Form\Extension\Validator\Util\ServerParams class is deprecated, use its parent Symfony\Component\Form\Util\ServerParams instead.
The NumberToLocalizedStringTransformer::ROUND_* constants have been deprecated, use \NumberFormatter::ROUND_* instead.

FrameworkBundle

Deprecated passing a RouteCollectionBuilder to MicroKernelTrait::configureRoutes(), type-hint RoutingConfigurator instead
Deprecated not setting the "framework.router.utf8" configuration option as it will default to true in Symfony 6.0
Deprecated session.attribute_bag service and session.flash_bag service.

HttpFoundation

Deprecate Response::create(), JsonResponse::create(), RedirectResponse::create(), and StreamedResponse::create() methods (use __construct() instead)
Made the Mime component an optional dependency

HttpKernel

Made WarmableInterface::warmUp() return a list of classes or files to preload on PHP 7.4+ not returning an array is deprecated
Deprecated support for service:action syntax to reference controllers. Use serviceOrFqcn::method instead.

Inflector

The component has been deprecated, use EnglishInflector from the String component instead.

Mailer

Deprecated passing Mailgun headers without their "h:" prefix.
Deprecated the SesApiTransport class. It has been replaced by SesApiAsyncAwsTransport Run composer require async-aws/ses to use the new classes.
Deprecated the SesHttpTransport class. It has been replaced by SesHttpAsyncAwsTransport Run composer require async-aws/ses to use the new classes.

Messenger

Deprecated AmqpExt transport. It has moved to a separate package. Run composer require symfony/amqp-messenger to use the new classes.
Deprecated Doctrine transport. It has moved to a separate package. Run composer require symfony/doctrine-messenger to use the new classes.
Deprecated RedisExt transport. It has moved to a separate package. Run composer require symfony/redis-messenger to use the new classes.
Deprecated use of invalid options in Redis and AMQP connections.
Deprecated not declaring a \Throwable argument in RetryStrategyInterface::isRetryable()
Deprecated not declaring a \Throwable argument in RetryStrategyInterface::getWaitingTime()

Notifier

[BC BREAK] The ChatMessage::fromNotification() method's $recipient and $transport arguments were removed.
[BC BREAK] The EmailMessage::fromNotification() and SmsMessage::fromNotification() methods' $transport argument was removed.

OptionsResolver

The signature of method OptionsResolver::setDeprecated() has been updated to OptionsResolver::setDeprecated(string $option, string $package, string $version, $message).
Deprecated OptionsResolverIntrospector::getDeprecationMessage(), use OptionsResolverIntrospector::getDeprecation() instead.

PhpUnitBridge

Deprecated the @expectedDeprecation annotation, use the ExpectDeprecationTrait::expectDeprecation() method instead.

Routing

Deprecated RouteCollectionBuilder in favor of RoutingConfigurator.
Added argument $priority to RouteCollection::add()
Deprecated the RouteCompiler::REGEX_DELIMITER constant

SecurityBundle

Deprecated anonymous: lazy in favor of lazy: true

Before

security:
    firewalls:
        main:
            anonymous: lazy

After

security:
    firewalls:
        main:
            anonymous: true
            lazy: true

Marked the AnonymousFactory, FormLoginFactory, FormLoginLdapFactory, GuardAuthenticationFactory, HttpBasicFactory, HttpBasicLdapFactory, JsonLoginFactory, JsonLoginLdapFactory, RememberMeFactory, RemoteUserFactory and X509Factory as @internal. Instead of extending these classes, create your own implementation based on SecurityFactoryInterface.

Security

Deprecated ROLE_PREVIOUS_ADMIN role in favor of IS_IMPERSONATOR attribute.

before

{% if is_granted('ROLE_PREVIOUS_ADMIN') %}
    <a href="">Exit impersonation</a>
{% endif %}

after

{% if is_granted('IS_IMPERSONATOR') %}
    <a href="">Exit impersonation</a>
{% endif %}

Deprecated LogoutSuccessHandlerInterface and LogoutHandlerInterface, register a listener on the LogoutEvent event instead.
Deprecated DefaultLogoutSuccessHandler in favor of DefaultLogoutListener.
Deprecated RememberMeServicesInterface implementations without a logout(Request $request, Response $response, TokenInterface $token) method.

Yaml

Added support for parsing numbers prefixed with 0o as octal numbers.
Deprecated support for parsing numbers starting with 0 as octal numbers. They will be parsed as strings as of Symfony 6.0. Prefix numbers with 0o so that they are parsed as octal numbers.

Before:
```
Yaml::parse('072');
```
After:
```
Yaml::parse('0o72');
```
Deprecated using the !php/object and !php/const tags without a value.

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