> Now, the question is, what will PHP do when it starts with page_9? Will
> it unserialize $_SESSION['policeman'] again, even though it already has
> an unserialized instance of $_SESSION['policeman']? If it does
> unserialize, does that mean that it creates a second instance of
> $_SESSION['policeman'], thereby breaking the common link that I am
> trying to provide?
page_9 does not have an unserialized instance of anything.
It is completely independent of page_2.
The $_SESSION variable is being shared, however, in some sense.
Probably the best solution here is to *NOT* store the unserialized
'policeman' in $_SESSION.
Set up a second array for your unserialized stuff, and write a function to
get/set it.
function get_session_data($field){
global $_UNSERIALIZED;
if (!isset($_UNSERIALIZED[$field])){
$_UNSERIALIZED[$field] = unserialize($_SESSION[$field]);
}
return $_UNSERIALIZED[$field];
}
function set_session_data($field, $value){
global $_UNSERIALIZED;
$_UNSERIALIZED[$field] = $value;
//$_SESSION[$field] = serialize($value);
}
You can either write a function you call at the end of every script to
serialize everything and put it into $_SESSION, or you can un-comment the
line above. Depends how much you shuffle in and out of serialized data.
Bottom line: Don't confuse $_SESSION values by sometimes having
serialized data, and sometimes not in it.
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