March 2019
Intermediate to advanced
580 pages
15h 3m
English
Content preview from Drupal 8 Module Development - Second Edition
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Services and the dependency injection container
Another architecturally important element of Drupal 8 is the Symfony dependency injection component (http://symfony.com/doc/current/components/dependency_injection.html), specifically represented by the service container.
This component is a staple of modern OOP PHP programming and as such has become foundational to Drupal 8. It allows us to create services that can be injected in various places of our code in order to handle certain functional (and oftentimes swappable) tasks. Additionally, they can also be used as an extension point because the service container is able to group services that have very specific responsibilities and use them for that automatically. In other words, simply by ...
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