title: laravel 5.2 valid ajax request
body: <p>How can we check in Laravel 5.2 if a request is a valid ajax request. In codeigniter ,we could check it like $this->input->is_ajax_request(). Does, Laravel 5.2 has something similar? </p>
  
  <p>Also, I would like to know that how can we validate a request for csrf token. Is it fine if I let my webpage render through the 'web' middleware generating a csrf token and then pass this token as ajax request parameter? Would Laravel take care of validating the token or is there an alternate way around this?</p>
  
  <p>I have checked the laravel 5.2 documentation, and since this is the first time I am dealing with laravel framework, it seems like the documentation assumes that the reader already has a familiarity with earlier versions of the framework. To a new comer like me this is little overwhelming.</p>
  
  <p>Thanks in advance. Please let me know if you need more inputs from me.</p>
  
  <p>Prakhar</p>