---
application: "Intervention Validation"
version: "Version 4"
status: "stable"
---

# Snake Case Rule

## Validate String Formatted in Snake Case

Discover how to validate strings formatted in snake case with the additional validation rules of Intervention Validation for your Laravel application.

> public Intervention\Validation\Rules\Snakecase::__construct()

The field under validation must be formatted as [Snake case](https://en.wikipedia.org/wiki/Snake_case) text.

### Parameters

none

### Example

```php
use Illuminate\Support\Facades\Validator;
use Intervention\Validation\Rules\Snakecase;

$validator = Validator::make($request->all(), [
    'attribute-key' => new Snakecase(),
]);
```

---

## Become a Sponsor

### Intervention Validation needs your help to keep the project going

Intervention Validation is non-commercial, open source licensed and completely free to use. The considerable
effort required to maintain and develop the software is only possible with the financial support
of sponsors. There are two ways in which you can support this project.

- Support via [GitHub Sponsors](https://github.com/sponsors/Intervention)
- Support via [Ko-Fi](https://ko-fi.com/interventionphp)