Living on the Edge
A series of posts showcasing the new features introduced by each Symfony version.
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.
In Symfony 4.3, event dispatching has been simplified to rely on pure PHP classes instead of using arbitrary strings to name events.
In Symfony 4.3, the Messenger component will switch from JSON to native PHP to serialize messages to a transport.
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.
In Symfony 4.3, apps which are accidentally published in development version are protected by default to prevent indexing them in search engines.
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).
Symfony 4.3 allows to use a custom index when injecting a collection of tagged services.
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.
In Symfony 4.3 it will be easier to get the parent form view in templates, to display HTML contents in the form field help and to configure the input format of date form fields.
Symfony 4.3 includes two new config options to configure the session ID length and the number of characters used to encode it.
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