Design Patterns in PHP and Laravel

© Kelt Dockins 2017

Kelt Dockins, Design Patterns in PHP and Laravel, 10.1007/978-1-4842-2451-9_17

17. Command

Kelt Dockins¹ 

(1)Dolph, Arkansas, USA

$> git checkout command

Intent

Encapsulate a request as an object, thereby letting you parameterize clients with different requests, queue or log requests, and support undoable operations. ¹

Applications

When you need to decouple an object that performs an action from an object that invokes an action, this is a good pattern to use. What does that last part really mean, though? Suppose you want to queue up a list of events that all do various different things. Later you will purge the queue, which will actually invoke all of those actions. Why would you not just invoke/perform the action immediately? There ...