how to add the values stored in a session variable in php?
Okay 

I have two pages-- page1.php and page2.php .Both of these pages have select lists.I have posted the values selected by the user to script.php which has them stored in session variables.

I need to add the values (which are the ones selected by the user from the select lists in both the pages) and display this total value in page3.php.now how do i add these values in the script?

any suggestions would be helpful.thanks in advance.
how to add the values stored in a session variable in php?
===

Okay 

I have two pages-- page1.php and page2.php .Both of these pages have select lists.I have posted the values selected by the user to script.php which has them stored in session variables.

I need to add the values (which are the ones selected by the user from the select lists in both the pages) and display this total value in page3.php.now how do i add these values in the script?

any suggestions would be helpful.thanks in advance.