I need to create a enw php script amd do the following!

[Frank H. Shaw]

I am building a server side php file and at the top of the file after i have stuffed the $_POST to $varables what ever was passed by a front end form in HTML and PHP. What i need to understand is what would I put in my PHP script to prcoess the user is logged in to the forum aready or not and then after that has been detremed and if not i need to know where i should look for the actual code to ask the user to login in before jumping to the actual forum that the user has selected by selecting one of my quick links on my main page which is not contained in the /forums/ - while on the question is there requirment to have my php script that does the checking weather login or not have to sit in the /forums/ or can i have it like sit or reside in my web root unstead?

THANKS

Frank H. Shaw