What I need is that when someone hits submit button on the form, it should execute a function that sends an SMS to the number entered by the user and presents a text box to key in the code that is received by the user in order to verify the phone number entered by the user.
I have the function that is needed. Please advise of what php/js files do I need to edit to accommodate the same and if possible, the sections that need to be edited too.
I would highly appreciate any assistance in this regard.