what is laravel facade
In laravel, the facade is a "static" interface provided for the binding class in the application service container. It can provide easier to test, more flexible, concise and elegant syntax during maintenance. All facades are defined in the "Illuminate\Support\Facades" namespace.
#The operating environment of this article: Windows 10 system, Laravel version 6, Dell G3 computer.
What is laravel facade
Facades provides a "static" interface for binding classes in the application service container.
Laravel has many built-in Facades, which can access most of Laravel's functions.
Laravel's facade serves as a "static proxy" for the underlying class in the service container. Compared with traditional static methods, it can provide easier to test, more flexible, concise and elegant syntax during maintenance.
All Laravel facades are defined under the Illuminate\Support\Facades namespace.
We can easily access the facade:
use Illuminate\Support\Facades\Cache; Route::get('/cache', function () { return Cache::get('key'); });
Throughout the Laravel documentation, many examples use the facade to demonstrate the various functional features of the framework.
When to use Facades
Facades have many advantages. They provide a simple and easy-to-remember syntax, allowing us to use them without having to remember long class names. The functional features provided by Laravel, in addition, make them easy to test due to their unique use of PHP dynamic methods.
When using Facades, there are some places that require special attention.
The main risk of using Facades is that it will cause the scope of the class to expand.
Because Facades are very simple to use and do not require injection, we will inadvertently use many Facades in a single class, causing the class to become larger and larger.
When using dependency injection, the more classes used, the longer the constructor will be, which will attract visual attention and remind you that this class is a bit huge. Therefore, when using Facades, pay special attention to controlling the size of the class to keep the scope of the class short.
When developing third-party extension packages that interact with Laravel, it is recommended to inject the Laravel contract instead of using Facades to use classes. Because extensions are built outside of Laravel itself, you cannot use Laravel Facades to test helper functions.
Facades Vs. Dependency Injection
One of the main advantages of dependency injection is the ability to switch the implementation of the injected class. This is useful when testing because you can inject a mock or stub and assert various methods called on the stub.
Usually, truly static methods cannot be mocked or stubbed. However, because Facades use dynamic methods to proxy method calls on objects resolved from the service container, we can test Facades just like we test injected class instances. For example, like the following route:
use Illuminate\Support\Facades\Cache; Route::get('/cache', function () { return Cache::get('key'); })
We can write a test like this to verify that the Cache::get method is called in the way we expect:
use Illuminate\Support\Facades\Cache; /** * 一个基础功能的测试用例。 * * @return void */ public function testBasicExample() { Cache::shouldReceive('get') ->with('key') ->andReturn('value'); $this->visit('/cache') ->see('value'); }
[Related recommendations: laravel video Tutorial】
The above is the detailed content of what is laravel facade. For more information, please follow other related articles on the PHP Chinese website!

Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

AI Hentai Generator
Generate AI Hentai for free.

Hot Article

Hot Tools

Notepad++7.3.1
Easy-to-use and free code editor

SublimeText3 Chinese version
Chinese version, very easy to use

Zend Studio 13.0.1
Powerful PHP integrated development environment

Dreamweaver CS6
Visual web development tools

SublimeText3 Mac version
God-level code editing software (SublimeText3)

Hot Topics

PHP and Flutter are popular technologies for mobile development. Flutter excels in cross-platform capabilities, performance and user interface, and is suitable for applications that require high performance, cross-platform and customized UI. PHP is suitable for server-side applications with lower performance and not cross-platform.

Database operations in PHP are simplified using ORM, which maps objects into relational databases. EloquentORM in Laravel allows you to interact with the database using object-oriented syntax. You can use ORM by defining model classes, using Eloquent methods, or building a blog system in practice.

PHP unit testing tool analysis: PHPUnit: suitable for large projects, provides comprehensive functionality and is easy to install, but may be verbose and slow. PHPUnitWrapper: suitable for small projects, easy to use, optimized for Lumen/Laravel, but has limited functionality, does not provide code coverage analysis, and has limited community support.

Laravel - Artisan Commands - Laravel 5.7 comes with new way of treating and testing new commands. It includes a new feature of testing artisan commands and the demonstration is mentioned below ?

The latest versions of Laravel 9 and CodeIgniter 4 provide updated features and improvements. Laravel9 adopts MVC architecture and provides functions such as database migration, authentication and template engine. CodeIgniter4 uses HMVC architecture to provide routing, ORM and caching. In terms of performance, Laravel9's service provider-based design pattern and CodeIgniter4's lightweight framework give it excellent performance. In practical applications, Laravel9 is suitable for complex projects that require flexibility and powerful functions, while CodeIgniter4 is suitable for rapid development and small applications.

Compare the data processing capabilities of Laravel and CodeIgniter: ORM: Laravel uses EloquentORM, which provides class-object relational mapping, while CodeIgniter uses ActiveRecord to represent the database model as a subclass of PHP classes. Query builder: Laravel has a flexible chained query API, while CodeIgniter’s query builder is simpler and array-based. Data validation: Laravel provides a Validator class that supports custom validation rules, while CodeIgniter has less built-in validation functions and requires manual coding of custom rules. Practical case: User registration example shows Lar

PHP Unit and Integration Testing Guide Unit Testing: Focus on a single unit of code or function and use PHPUnit to create test case classes for verification. Integration testing: Pay attention to how multiple code units work together, and use PHPUnit's setUp() and tearDown() methods to set up and clean up the test environment. Practical case: Use PHPUnit to perform unit and integration testing in Laravel applications, including creating databases, starting servers, and writing test code.

When choosing a framework for large projects, Laravel and CodeIgniter each have their own advantages. Laravel is designed for enterprise-level applications, offering modular design, dependency injection, and a powerful feature set. CodeIgniter is a lightweight framework more suitable for small to medium-sized projects, emphasizing speed and ease of use. For large projects with complex requirements and a large number of users, Laravel's power and scalability are more suitable. For simple projects or situations with limited resources, CodeIgniter's lightweight and rapid development capabilities are more ideal.
