Quando viene eseguito $_SERVER['PHP_SELF'] le mie variabili di sessione prima impostate e stampate, scadono:

codice:
Notice: Undefined variable: nom in C:\Program Files\EASYPHP\www\home.php on line 63

Notice: Undefined variable: cog in C:\Program Files\EASYPHP\www\home.php on line 63

Notice: Undefined variable: email in C:\Program Files\EASYPHP\www\home.php on line 65

Notice: Undefined variable: code in C:\Program Files\EASYPHP\www\home.php on line 65
mi spiego?