Unable to use session in Laravel

I'm just creating a simple login page in Laravel 5. Problem: After successfully login I have to create a session of email address and move to dashboard. If session is not created than move to login page.

Here is my controller function code:

public function admin_auth()
{       
    $matchThese = ['email' => $_POST['email'], 'password' =>     $_POST['password']];
    $login['result'] = DB::table('login_auth')->where($matchThese)->get();

    if($login['result'])
    {
        //session_start();
        date_default_timezone_set('Asia/Kolkata');
        $_SESSION['session_email'] = $_POST['email'];
        Session::put('session_email', $_POST['email']);
            if (Session::has('session_email'))
            {
                 echo 'Done';
            }else echo 'Session Not Created';           


    }else echo 'Email Or Password Not Match';
}    

In above function I got 'Done'.It means the session is created but when I'm checking same variable in other method of the same controller then session is not set.

Here is my other function:

   public function dashboard()
    {  
         if (Session::has('session_email'))
                {
                    return view('login.dashboard');
                }else echo 'Session Not Created';    

    }

I always got 'Session Not Created'.

Thanks for help in advancd.

via Chebli Mohamed