Practical Tips: Customizing Chinese Validation Rules in Laravel

During the development process of Laravel, under normal circumstances, we will use the default validation rules provided by the framework to verify the data entered by the user, but sometimes we need to customize some specific validation rules to meet business needs. This article will introduce how to customize Chinese validation rules in Laravel and give specific code examples.

1. Understand the Validator class

Laravel’s validation rules are all implemented through the Validator class. The Validator class provides a series of methods for validating rules. We can implement custom validation rules by inheriting the Validator class and adding custom rule methods.

2. Create custom validation rules

First, we need to create a ServiceProvider to register our custom validation rules. Execute the following command in the command line to create a new ServiceProvider:

php artisan make:provider CustomValidationRulesServiceProvider

Then find the CustomValidationRulesServiceProvider.php file in the app/Providers directory, open the file and Register our custom validation rule in the boot method:

<?php

namespace AppProviders;

use IlluminateSupportServiceProvider;
use IlluminateSupportFacadesValidator;

class CustomValidationRulesServiceProvider extends ServiceProvider
{
    public function boot()
    {
        Validator::extend('custom_rule', function ($attribute, $value, $parameters, $validator) {
            // 自定义验证规则的具体逻辑，这里可以根据业务需求编写验证逻辑
            return $value === 'custom_value';
        });
    }

    public function register()
    {
        //
    }
}

In the above code, we define a custom validation rule named custom_rule, and The validation logic is written in the closure function. Here, we simply judge whether the input value is equal to custom_value. In actual business, more complex logical judgments can be made as needed.

3. Register custom validation rules

Next, we need to register the ServiceProvider we created in app/Providers/AppServiceProvider.php. Use the app()->register() method in the boot method of AppServiceProvider to register our custom ServiceProvider:

public function boot()
{
    $this->app->register(CustomValidationRulesServiceProvider::class);
}

4 . Using custom rules in validation rules

Now that we have created and registered custom validation rules, we can use our custom rules in form validation. For example, we write a login form verification method in appHttpControllersUserController.php:

public function login(Request $request)
{
    $validatedData = $request->validate([
        'username' => 'required',
        'password' => 'required|min:6|custom_rule', // 使用自定义规则
    ]);

    // 其他处理逻辑
}

In the above code, we add our custom rules to the verification rules of the password field custom_rule, so that the validation logic of our custom rules will be triggered when the user form is submitted.

Through the above steps, we successfully created a custom Chinese validation rule in Laravel and used the rule in the code. In this way, we can easily extend Laravel's validation capabilities to meet various business needs.

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