codeigniter age form

i want to make a sign up form 开发者_C百科where i get peoples birthday but can some one explain me how to make one?.

is there a function in codeigniter that do that :)?.

and then the user want to edit hes birthday how can i do so the day,month,year is selected to the current birthday :)?.

hope some one can help me out :)

Best regards Lena

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Have a look at the available Authentication libraries. Most of them are open source and you could easily extend them to add the birthday information in the users table.