How can I design a system that let other people modify record from another server? Like I have registered member on my site, people can use external application to check if the (1) user is registered (2) user is online (3) update user profile on mysite Like the myspace.com stuff, I saw I php class from phpclasses.org that you can use to modify your profile from another server. So I want to design something like myspace, but sometime I will want others to be able to check if a user is registered or online on my system. I want to use PHP/MySql. Please I basic example/article link will be appreciated.
