I have a database with the following
ID Nome
1 A
2 B
3 C
I would like that when accessing www.example.com/perfil.php take all the information and print on the screen, however when accessing www.example.com/2/B or www.example.com/1/A just take this information and print it on the screen.
A full explanation can be found here
Correcting your question by what I understand you do not need to be past the two values just one would be enough. For example. www.site.com/2 - > Would return all user information of name B or www.site.com/B would also retrieve information from the same correct user?
Because if you pass a number you would do a search based on Identifier and in case an Alpha is passed (letters and numbers) you would recover the profile by the username.
Search Google Rewrite_mod which is an apache module.