Creation of membership forms

[ciggi]

How do I create a form where a new user has to join up as a member which requires a 'username' & 'password'............I understand the basics of form creation and that the form submission can be sent to my email box etc but....
I need to create an automated form submission where usernames etc are automatically detected. Do I create some sort of database that detects whether or not usernames etc are already in use?? and how is it all linked up??

[ray326]

You have to put the accepted names in a data store of some kind then check new requests against that. The data store does not have to be a database table, it could be a flat file. You have to have server side processing; at least CGI.