Curious: Billy's post re "isset"

[Anon]

I found a previous post interesting. Why does the following example not work, and what can be added or removed to make it work?

<?php
if (isset($myvariable_shouldnt_change))
{
echo $myvariable_shouldnt_change;
}
else
{
$myvariable_shouldnt_change = date("njis");
}
echo $myvariable_shouldnt_change;
?>

//at this point, you should be able to reload the page as many times as you want and the variable "$myvariable_shouldnt_change" should stay the same! But it doesn't

Thanks

[stuartc1]

If you reload the page the variable will be lost. You can only retain variable values if you use session variables.
try this:

<?
session_start();
if (isset($myvariable_shouldnt_change))
{
echo $myvariable_shouldnt_change;
}
else
{
$myvariable_shouldnt_change = date("njis");
}
echo $myvariable_shouldnt_change;

session_register("myvariable_shouldnt_change");

?>

you should now be able to reload the page and it should stay the same.

[Anon]

Doesn't work