How to concatenate two registration form fields into one
On the registration form I have 3 fields:
1. GrFirstName
2.GrLastName
3.GrFirstLastNameJoin
The same columns I have in PhpMyAmin database.
Question is - what is the way to concatenate "GrFirstName" and "GrLastName" in order to get "GrFirstLastNameJoin" without every single time typing them manually into registration form's field "GrFirstLastNameJoin"?