If you’ve tried to create and submit a form in a Laravel application already you’ve likely run into TokenMismatchException.

in many cases you will try to disable the CSRF protection and then move on buy is that really worth. Laravel takes care of the security very seriously..So sit back and relax this post is going to be little long..

here is what you can do to disable the CSRF Protection :- 

In Laravel 5, How to disable VerifycsrfToken middleware for specific route?

In Laravel 5 this has chagned a bit. Now you can simply add the routes you want to exclude from csrftoken verification, in $except array of the class

‘VerifyCsrfToken’ (\app\Http\Middleware\VerifyCsrfToken.php):

class VerifyCsrfToken extends BaseVerifier
{
    protected $except = [
        // Place your URIs here
    ];
}

Examples:

1. If you are using a route group:

Route::group(array('prefix' => 'api/v2'), function()
{
    Route::post('users/valid','UsersController@valid');
});

Your $except array looks like:

protected $except = ['api/v2/users/valid'];

2. If you are using a simple route

Route::post('users/valid','UsersController@valid');

Your $except array looks like:

protected $except = ['users/valid'];

3. If you want to exclude all routes under main route (users in this case)

Your $except array looks like:

protected $except = ['users/*'];

see: http://laravel.com/docs/master/routing#csrf-excluding-uris

After doing this you will be able to receive the POST Request without having any problem. But remeber this is not a solution for the production software. 

SO, what to do now ???   here is the simple solution :-

WHAT IS CSRF?

A cross-site request forgery is an attack that forces an end user to execute unwanted actions on a web application in which they’re currently authenticated. CSRF attacks specifically target state-changing requests, not theft of data, since the attacker has no way to see the response to the forged request. With a little help of social engineering (such as sending a link via email or chat), an attacker may trick the users of a web application into executing actions of the attacker’s choosing. If the victim is a normal user, a successful CSRF attack can force the user to perform state changing requests like transferring funds, changing their email address, and so forth. If the victim is an administrative account, CSRF can compromise the entire web application.

we protect CSRF attacks by generate token for authenticate all inbound routes withPOSTDELETE which Laravel does out of the box.

We have two options for protect this. The first, and preferred, method is to add the _token input to each of your form submission. In HTML forms, this example

<form action="/user/1" method="POST"> <?php echo csrf_field(); ?> <input type="hidden" name="_token" value="<?php echo csrf_token(); ?>"> </form>

In JavaScript , we store the token on every page in a <meta> tag like example:

<meta name="csrf-token" content="<?php echo csrf_token(); ?>" id="token">

then we use selector get meta value and create HTTP header name X-CSRF-TOKEN

// in jQuery: $.ajaxSetup({ headers: { 'X-CSRF-TOKEN': $('meta[name="csrf-token"]').attr('content') } });
// in Vue: Vue.http.interceptors.push((request, next) => { request.headers['X-CSRF-TOKEN'] = document.querySelector('#token').getAttribute('content');
next(); });

now we doesn’t need disable csrf middleware anymore