Symfony 4.0

What’s new

Profiler

• [Validator information in the Symfony profiler](Validator information in the Symfony profiler)
• [Symfony user impersonation in debug toolbar](Symfony user impersonation in debug toolbar)

Validation

Constraints

• [ExpressionLanguage Constraint](ExpressionLanguage Constraint)
• [Groups support for Valid constraint](Groups support for Valid constraint)

Annotations

• [Prefix all controller route names](Prefix all controller route names)

Subscribers

• [Subscribing to events in the micro kernel](Subscribing to events in the micro kernel)

Components

Stopwatch

• [reset() method](reset() method)
• [Microseconds support](Microseconds support)

Command

• [Lazy Commands](Lazy Commands)

Translation

• [XLIFF 2.0](XLIFF 2.0)

Guard

• [getCredentials() responsibilities split](getCredentials() responsibilities split)

Sessions

• [Lazy Sessions](Lazy Sessions)

Commands

• [debug autowiring](debug autowiring)
• [debug form](debug form)

Autowiring

• [Local Service Binding](Local Service Binding)