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If it is, then the user has pressed the "Destroy" button. 6–10 If $destroy has not been set, then register a session variable named $name and assign that variable the value "Spike". 13–14 Print out the current session ID and the value of the $name variable. 15–18 Display a form to the user that allows him or her to reload the current page or destroy the session variable associated with the current session. If the user reloads the page (by clicking "Reload" or using the browser's reload button), then the session variables are reset and the value for session ID is displayed.

Body> 30. Script 2-3. php Line-by-Line Explanation LINE DESCRIPTION 2 Start the session or continue an existing session. 4–13 Print out the beginning of the HTML page. 14–17 Greet the users and show some of their current settings. 19–26 Execute a while loop that goes though the user's settings in the $news_prefs session variable. Print the key of the array item to the screen. If the value of the current array item is enabled, then print "Enabled" on the screen; otherwise, print "Disabled" on the screen.

Gc_probability, sets the percentage probability that the files identified as garbage are deleted. The default of "1" means that there is a one-percent probability that all of the items identified as garbage are deleted for every session started. gc_maxlifetime, sets the lifetime, in seconds, that a session file can exist before being labeled as garbage. The default of "1440" means that every session file that is older than 24 minutes is considered junk. Top A Simple Session-Based Shopping Cart The following example is a simple session-based shopping cart that allows users to add or remove items from their cart.