RE: [PHP] Are variables persistent?

[snip] When I refresh a script using a form, it goes through & resets all my custom Constants but presumably all my variables should still hold their values from the last run, right? THere are no functions involved. What would cause a variable or even a $POST[] value to be erased? [/snip] Refreshing the script causes the variable arrays to be repopulated with empty or blank variables unless a session was used to hold the variables. Refreshing is essentially calling the script without passing any variables.