session php. Copied page. Variables stopped working. What could it be?

Question

PHP

In general, I made a page where, when you click on the submit, if the value of the session variable changed from zero to one. copied the page, renamed. but to work

if(isset($_POST['ses']))
    {
        if ($_SESSION['act2'] == 1) $_SESSION['act2'] = 0;
        else $_SESSION['act2'] = 1;

stopped. what is it maybe7 you can not give the same names to session variables or how is it even possible?

Answer 1

the issue can be considered closed, the case was somewhat different. but still how will PHP react to the same names of session variables on different pages?

Answer 2

Well, you would still bring the code, otherwise guessing is not very convenient - maybe you forgot to start the session there or something else ...

Answer 3

session_start(); at the very beginning of the page did not forget to specify?