title: codeigniter - make a difference in the two dates with database
body: <p>Help me .. !!
  I 'm in the final project , build a web with Framwork CodeIgniter . but I difficulty to make a difference in the control script , the examples I list dated 07.02.2015 and should regristasi before 3 days but I forgot to register so it appears the warning .. how to make</p>