Implementing a Service Layer in PHP

In this post, I’ll show you how to implement a service layer in PHP using a real-life example.

First, let’s define some terms:

• The service is a separate class that encapsulates the business logic for a particular domain or functionality.
• The service class can be called by controllers or other classes in your application to perform the necessary operations.

An example implementation of User Registration

Let’s look at a common example: creating a user registration with a service layer. Here are the steps to do this.

1. Create UserService class

UserService class requires a UserRepository object to interact with the database.

UserRepository is responsible for querying and manipulating user data in the database.

In this example, the UserRepository class interacts with the User model provided by the Eloquent ORM.

The findByUsername method queries the user’s table for a user with a specific username using the where method and returns the first result using the first method. The save method simply saves the user model using the save method.

By separating the business logic into a service class and the data access logic into a repository class, we can keep our code modular, testable, and maintainable. We can easily swap out the data access layer with a different implementation without affecting the service layer.

Create a route

Next, we need to create a route. Here’s an example:

Route::post('/register', 'UserController@register');

Create a controller

Next, create a new controller called UserController using this code:

php artisan make:controller