Illuminate\Session\TokenMismatchException in vendor/laravel/framework/src/Illuminate/Foundation/Http/Middleware/VerifyCsrfToken

Issue Reason:

In Laravel when we submit any form or try to run any Ajax request then we must

need to add csrf_token() if we do not add this security token in our requests then 

laravel throws the security error

TokenMismatchException

Form Submission

Add this hidden input security _token field see below.

<input type="hidden" name="_token" value="{{ csrf_token() }}">



Ajax Request
On ajax post or get requests add a header before running ajax request. See below


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




Disable TokenMismatchException using $except array :
We can disable token check/verifying in laravel but it is not recommanded at all.
Please go to the file  
/app/Http/Middleware/VerifyCsrfToken.php

here you will find an except array see below

protected $except = [
    '/',
];

Add a request in an array that you want to bypass without any security check.