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PHP: Session Variables
A session variable is a variable that persists from one page to another without physically passing that information. One common example of a session variable is storing the username of the user logged in.
Session variables are useful for shopping carts and most applications. With session variables you do not need to "hide" data in hidden form fields or pass them via Query Strings from page-to-page.
My example script is the old guess a number between 1 and 100 game. The script uses session variables to track the number picked, number of guesses for the current game, number of games played and total number of guesses from game to game.
Download the source code here: guessnum.phps.
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