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New in Symfony 4.3: Simpler Routing Options Config
In Symfony 4.3, routes can define three new options called utf8, locale and format to configure those values directly without having to add other options to do that.
New in Symfony 4.3: Exclude More Files with Finder
In Symfony 4.3, the Finder component can exclude from the results all the files/directories that match the patterns of the gitignore file.
New in Symfony 4.3: URL Env Var Processor
Symfony 4.3 adds two new env var processors so you can set the value of an option to the value of some URL or query string part.
New in Symfony 4.3: Simpler event dispatching
In Symfony 4.3, event dispatching has been simplified to rely on pure PHP classes instead of using arbitrary strings to name events.
New in Symfony 4.3: Native PHP Serialization for Messenger
In Symfony 4.3, the Messenger component will switch from JSON to native PHP to serialize messages to a transport.
New in Symfony 4.3: Routing improvements
In Symfony 4.3, routes can include boolean container parameters, some routing options have been deprecated and the debug:router command will also display the route conditions.
New in Symfony 4.3: Automatic Search Engine Protection
In Symfony 4.3, apps which are accidentally published in development version are protected by default to prevent indexing them in search engines.
New in Twig: Namespaced Classes
The next stable version of Twig 2.x will deprecate non-namespaced PHP classes, which will be removed in Twig 3.x (to be released during 2019).
New in Symfony 4.3: Indexed and Tagged Service Collections
Symfony 4.3 allows to use a custom index when injecting a collection of tagged services.
New in Symfony 4.3: Deprecated the Role and SwitchUserRole classes
Symfony 4.3 deprecates the Role and SwitchUserRole classes. Instead, define the user roles as strings and use the new SwitchUserToken to get the impersonated user.