CodeIgniter - How to return Json response from controller

Question

How do I return response from the controller back to the Jquery Javascript?

Javascript

$(\'.signinform\').submit(function() { 
   $(this).ajaxSubmit(         


        

Answer 1

return $this->output
            ->set_content_type('application/json')
            ->set_status_header(500)
            ->set_output(json_encode(array(
                    'text' => 'Error 500',
                    'type' => 'danger'
            )));