Undestanding type of request

[rushenas]

Hi all
I want my home page (index.php), can determine which contents must be shown. But not with regular variables passed by GET or POST method.
When somebody enter the website address, he/she must see regular index (main) page.
But when a request from a SOAP server recieve, index page must provide a web service function. So my code must determine whether access to index page recieved from a regulat HTTP request, or from a SOAP server.
How can I implement this?

[NogDog]

I am not sure there is any way to differentiate the requests. As far as I know, both use the same HTTP headers, which is all your server is going to see.