Laravel | CSRF Protection

Cross-Site Request Forgery (CSRF) is a type of attack that performed by the attacker to send requests to a system with the help of an authorized user who is trusted by the system. Laravel provides protection with the CSRF attacks by generating a CSRF token. This CSRF token is generated automatically for each user. This token is nothing but a random string that is managed by the Laravel application to verify the user requests. How to Use: This CSRF token protection can be applied to any HTML form in Laravel application by specifying a hidden form field of CSRF token. The requests are validated automatically by the CSRF VerifyCsrfToken middleware. There are three different ways in which you can do this.

1. @csrf
2. csrf_field()
3. csrf_token()

@csrf: This is a blade template directive for generating the hidden input field in the HTML form.

• Syntax:

  <form method="POST">
   @csrf // Generate hidden input field
   .....
   .....
  </form>

• Example:

csrf_field(): This function can be used to generate the hidden input field in the HTML form. Note: This function should be written inside double curly braces.

• Syntax:

  <form method="POST"<
  
   // Generate hidden input field
   {{ csrf_field() }} 
   .....
   .....
  </form>

• Example:

csrf_token(): This function just gives a random string. This function does not generate the hidden input field. Note: HTML input field should be written explicitly. This function should be written inside double curly braces.

• Syntax:

  <form method="POST">
   <input type="hidden" name="_token" value="{{ csrf_token() }}">
   .....
   .....
  </form>

• Example:

Output: The output is going to be the same for any of the above three ways to generate a CSRF token. The CSRF token field should be written/generated at the start of every HTML form, using any of the three ways, in a Laravel application. 👁 Image
Inspect Element Output: 👁 Image
Reference: https://laravel.com/docs/6.x/csrf