Singleton¶
Definition¶
A Singleton is a creational design pattern that lets you ensure that a class has only one instance, while providing a global access point to this instance. • refactoring.guru
All implementations of the Singleton have these two steps in common:
- Make the default constructor private, to prevent other objects from using the new operator with the Singleton class.
- Create a static creation method that acts as a constructor. Under the hood, this method calls the private constructor to create an object and saves it in a static field. All following calls to this method return the cached object.
Usage¶
Examples¶
$this->app->singleton('HelpSpot\API', function ($app) {
return new \HelpSpot\API($app->make('HttpClient'));
});