YouД¬an see that the form field data was passed to your callback method Reload your form and submit it with the word вЂњtestвЂќ as the username. load -> helper ( array ( 'form', 'url' )) $this -> load -> library ( 'form_validation' ) $this -> form_validation -> set_rules ( 'username', 'Username', 'callback_username_check' ) $this -> form_validation -> set_rules ( 'password', 'Password', 'required' ) $this -> form_validation -> set_rules ( 'passconf', 'Password Confirmation', 'required' ) $this -> form_validation -> set_rules ( 'email', 'Email', 'required|is_unique' ) if ( $this -> form_validation -> run () = FALSE ) Form validation, while simple to create, is generally very messy Messages, various control structures are usually placed within the form Usually requires a significant amount of code, and to display error

Prep the data for insertion in the database.ДЄlthough there is nothing terribly complex about the above process, it.

Pre-format the data if needed (Does the data need to be trimmed? HTML.

The username canвЂ™tД«e someone elseвЂ™s existing username, or perhaps even a reserved word. Minimum length, and not exceed a maximum length. Validated to contain only permitted characters. For example, if a username is submitted it must be

Verify that the data is of the correct type, and meets the correctД¬riteria.This process continues until you have submitted a valid form.Item, the form is redisplayed containing your data along with an If you submitted something invalid, or perhaps missed a required.Before explaining CodeIgniterвЂ™s approach to data validation, letвЂ™s

Forms to go missing field name