What design patterns does laravel use?

The Laravel framework adopts the following design patterns: Singleton pattern: manages singleton instances in service containers Appearance pattern: simplifies interaction with complex services Factory method pattern: creates model instances Dependency injection pattern: manages dependency observation Author pattern: Handling events and notifications Strategy pattern: Control model authorization Composition pattern: Organization form builder System Adapter pattern: Integrating Eloquent ORM and different database systems

Design Patterns Used in Laravel

The Laravel framework uses numerous design patterns to achieve its functionality and flexibility. These patterns help Laravel remain reusable, extensible, and easy to maintain.

Singleton pattern

The singleton pattern is used to ensure that only one class instance exists. Laravel uses the singleton pattern to manage service containers in your application. The service container stores singleton instances of all Laravel components, such as routing, database connections, and caching.

Facade pattern

Facade pattern provides a simple interface to complex subsystems. Laravel uses the facade pattern to simplify interaction with various services such as the Eloquent ORM and validation systems. Facade classes hide the underlying complexity and make it easy for developers to use these services.

Factory Method Pattern

The Factory Method pattern allows you to create objects using various subclasses without specifying the exact subclass. Laravel uses the factory method pattern to create model instances. Model factories provide flexibility when creating model instances, such as random generators and data prepopulators.

Dependency Injection Mode

Dependency Injection mode moves an object’s dependencies into an external configuration instead of injecting them directly into the object. Laravel uses dependency injection to manage dependencies through a service container. This allows you to easily switch dependencies, improving testing and maintainability.

Observer Pattern

The Observer pattern allows an object (publisher) to notify multiple objects (observers) about changes in its state. Laravel uses the observer pattern to handle events and notification systems. When an event occurs, the publisher notifies all registered observers, allowing you to react to the event.

Strategy Mode

Strategy mode allows you to change the behavior of an object to a different strategy. Laravel uses the strategy pattern to control authorization to models. Policy classes define authorization rules, which are then assigned to specific models, allowing you to easily customize authorization behavior.

Composite mode

Composite mode organizes objects into a tree-like structure, where each object can represent a child object or leaf object. Laravel uses the composition pattern to implement a form builder system. The form builder component allows you to nest subforms and create complex form structures.

Adapter Pattern

The Adapter pattern enables two incompatible interfaces to work together. Laravel uses the adapter pattern to integrate Eloquent ORM with various database systems. Adapter classes are responsible for converting Eloquent queries into queries for a specific database system.

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