If someone clicks on a checkbox then..

[Oskare100]

Hello,
I need a codepart that works like this:
If you check a box in a registration, something is runned and if it isn't checked something else happends. Like if/else but I don't know how to do that.

Thanks,
Oskar R

Edit:
Maybe I should add:
I need a codepart that works like this:
I just need it to work like (in a registration), if a box is checked then a mysql database is created and if it isn't nothing happends.. I do already have the mysql database creation code so I just need that little thing..

[rincewind456]

Something like this

if (isset($_POST['check_box_name_here'])){
	//create the sql table
}