Working with Session Variables

Accessing a unique identifier on each of your PHP documents is only the start of PHP’s session functionality. You can set any number of variables as elements of the superglobal $_SESSION array. After these are set, they are available to future requests in the session.

Listing 20.2 registers two variables with a session (lines 10 and 11).

Listing 20.2. Registering Variables with a Session
 1: <?php
 2: session_start();
 3: ?>
 4: <!DOCTYPE html PUBLIC
 5:   "-//W3C//DTD XHTML 1.0 Strict//EN"
 6:   "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
 7: <html>
 8: <head>
 9: <title>Listing 20.2 Registering Variables with a Session</title> 10: </head> 11: <body> 12: <div> 13: <?php 14: $_SESSION['product1'] = "Sonic Screwdriver"; ...

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