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CSRF protection in Laravel: what is it and how to use it

CSRF (Cross-Site Request Forgery) is a type of attack in which an attacker forces a user to perform an undesirable action on a site where they are logged in. In Laravel, CSRF protection is implemented automatically using CSRF tokens.

Laravel generates a CSRF token for each active user session. This token must be included in all HTML forms and AJAX requests. When the request is sent, Laravel checks the availability and validity of the token.

When using Blade templates in Laravel, the CSRF token is automatically added to the forms using the @csrf directive:

<form method="POST" action="/example">
    @csrf
    <!-- form fields -->
    <button type="submit">Send</button>
</form>

For AJAX requests, you must include the CSRF token in the request header. This can be done using JavaScript:

$.ajaxSetup({
    headers: {
        'X-CSRF-TOKEN': $('meta[name="csrf-token"]').attr('content')
    }
});

Protection against CSRF attacks is an important aspect of web application security. Laravel provides convenient tools to implement this protection, ensuring data security and preventing unwanted actions from being performed on behalf of the user. For more information and examples, visit the Laravel documentation.