Radio button group

[OOP]

Hi,
Recently started to use Dreamweaver to program PHP. I'm running into a problem as to how can i check for which radio button in a group has been selected by user?

I have a radio button group (2 radio buttons) called Realmselect. How to write source code to check which one is selected upon submit button is pressed?

Thanks for your patient in advance to explain this simple concept

 

[OOP]

ok, i've found the solution already.
Just to give an update and info about this, my above problem can be solved by using $HTTP_POST_VARS[name of the radio group] and each radio buttons is assigned a different name.
Therefore, upon the submit button is clicked, the $HTTP_POST_VARS[name of the radio group] will equal to the name of the radio button (depends on which one is clicked)

For example,

if($HTTP_POST_VARS[name of the radio group] == 'name of radio button') {

process
}