public function setSession($user_email)
 {
     $user1 = new User_info();
     $user1->user_email = $user_email;
     $user = $user1->getUserInfo();
     $s_data = array('user_email' => $user->user_email, 'user_id' => $user->user_id, 'user_name' => $user->user_name, 'first_name' => $user->first_name, 'session' => 'login#key23$%F');
     $this->session->set_userdata($s_data);
     /* to check the session values */
     //echo $this->session->userdata('user_email'); die;
 }