Detailed explanation of ischecked method in laravel

isChecked method in laravel

The isChecked method is often used in laravel form validation. This method can check whether a check box or radio button is selected. When submitting data in the form, we need to verify the data filled in by the user. The isChecked method is one of the methods used to verify whether the check box or radio button is checked.

Usage of isChecked method

In laravel, we can use the isChecked method to verify whether the user has selected the check box or radio button.

First, you need to reference laravel's form validation class in the controller:

use Illuminate\Http\Request;
use Illuminate\Support\Facades\Validator;

Then, define the validation rules:

$validator = Validator::make($request->all(), [
    'checkbox' => 'required|isChecked',
]);

Here, we define a file called "checkbox " field, this field is required and must be selected.

Implementation of isChecked method

isChecked method is actually a custom validation rule. We need to write the specific implementation of this method in the custom validation rule:

Validator::extend('isChecked', function($attribute, $value, $parameters, $validator) {
    return $value == 'on' || $value == 1 || $value == true;
});

Here We use the extend method of the Validator class to extend the validation rules, and define the implementation of the isChecked method inside this method. The implementation of the isChecked method is very simple. You only need to determine whether $value is equal to 'on', 1 or true.

Summary

The isChecked method in laravel is very suitable for the verification of check boxes or radio buttons in form validation, which can effectively ensure the correctness of the user's data input. It should be noted that the isChecked method is a custom validation rule, and its specific implementation needs to be defined in the custom validation rule.

At the same time, when using the Validation class in the controller for form verification, you need to define the validation rules in the second parameter and just write the rules according to actual needs.

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