Application of PSR2 and PSR4 specifications in Laravel development

The application of PSR2 and PSR4 specifications in Laravel development

In Laravel development, it is very important to follow the PSR2 and PSR4 specifications. These specifications can improve the code's reliability. Readability and maintainability. This article will introduce the application of PSR2 and PSR4 specifications in Laravel development and provide specific code examples.

1. Application of PSR2 specification

PSR2 specification mainly focuses on the style and format of code. The following are some examples of PSR2 specification application commonly used in Laravel development:

1. Use four spaces to indent code, not tabs.
2. Each line of code cannot exceed 80 characters. If the code is too long, it needs to be wrapped.
3. Use Unix newline characters (
   ) instead of Windows newline characters (
   ).
4. Use { and } to wrap code blocks of classes, methods, and control flow statements (if, while, for, etc.).
5. Use camel case naming convention for function names and method names, and lowercase letters and underscores for variable names.
6. A space needs to be added after the control flow statement (if, while, for, etc.).
7. No spaces after the parentheses of functions and methods.
8. Use blank lines to separate code blocks to improve readability.

The following is an example of a Laravel controller that follows the PSR2 specification:

<?php

namespace AppHttpControllers;

use AppModelsUser;
use IlluminateHttpRequest;

class UserController extends Controller
{
    public function index(Request $request)
    {
        $users = User::all();

        return view('users.index', compact('users'));
    }

    public function show(Request $request, $id)
    {
        $user = User::find($id);

        return view('users.show', compact('user'));
    }
}

2. Application of the PSR4 specification

The PSR4 specification mainly focuses on automatic loading and namespaces Specifications, the following are some examples of PSR4 specification applications commonly used in Laravel development:

1. All class files must have a .php suffix.
2. The namespace of the class must be consistent with its path in the file system.
3. Use namespaces to represent class hierarchies to avoid class name conflicts.
4. Use namespaces to introduce other classes.

The following is an example of a Laravel model that follows the PSR4 specification:

<?php

namespace AppModels;

use IlluminateDatabaseEloquentModel;

class User extends Model
{
    protected $table = 'users';
}

In the above example, the AppModels namespace indicates that the class is in the Models folder in the app directory. Use namespaces to avoid class name conflicts and to better organize and manage your code.

3. Conclusion

In Laravel development, it is very important to follow the PSR2 and PSR4 specifications, which can improve the readability and maintainability of the code. This article gives some application examples of PSR2 and PSR4 specifications commonly used in Laravel development. I hope it will be helpful to your code specifications in Laravel development.

PSR2 and PSR4 specifications are not only applicable in Laravel development, but also in other PHP frameworks and projects. By following these specifications, we can write more standardized, easy-to-read, and easy-to-maintain code, improving development efficiency and team collaboration.

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