Login/register

Hello everybody,im here for a simple question.

It is possible to make a login/register interface that connects to the mysql database and insert/get user data?

I am trying to make an online space game but im not sure if the database connection should work as im expecting e.g. Register/login,get user level interact with other players.

Nobody has no ideea ? <img src="smileys/smiley19.gif" border="0" align="middle" />

I am not an expert at all, but maybe with the use of the Ajax object, you could counicate to your server.

yes i already did the php connection but im not sure if i can add if/else conditions(if user exist login and create session/else display error),same on register