CodeIgniter Registration Form Part 5
This is part 5 of a series on how to create a user registration form in CodeIgniter. This particular video covers form validation callback functions, where, in this case, we are checking to make sure that the username the user has chosen doesn’t already exist in the database.
I strongly recommend you watch all my videos in full screen mode. It’s the little button on the bottom right of the video. You will be able to see everything much better if you do.