Merge pull request #3879 from shaedrich/psr-11

Add topic "PSR 11"

Author: ahpook

topics/psr-11/index.md

@@ -0,0 +1,9 @@
+---
+display_name: "PSR-11: Container interface"
+short_description: PSR-11 is a set of common interfaces for dependency injection containers.
+topic: psr-11
+related: psr, service-locator, dependency-injection, dependency-injection-container, service-container, di-container, container-interop
+url: https://www.php-fig.org/psr/psr-11/
+created_by: Matthieu Napoli, David Négrier
+---
+common interfaces for dependency injection containers (usually [service locators](https://github.com/topics/service-locator)) in a standardized way of how frameworks and libraries make use of a container to obtain objects and parameters.