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P. 179
Open Source Technologies
Notes 10: <?php
11: if (isset($_SESSION[products])) {
12: echo “<strong>Your cart:</strong><ol>”;
13: foreach (unserialize($_SESSION[products]) as $p) {
14: echo “<li>$p”;
15: }
16: echo “</ol>”;
17: }
18: ?>
19: <p><a href=”listing10.4.php”>return to product
choice page</a></p>
20: </body>
21: </html>
Once again, we use session_start() to resume the session on line 2. We test for the presence
of the $_SESSION[products] variable on line 11. If it exists, we unserialize it and loop through
it on lines 13–15, printing each of the user’s chosen items to the browser. An example is shown
in Figure 10.3.
Figure 10.3: Accessing an Array of Session Variables
For a real shopping cart program, of course, you would keep product details in a database
and test user input, rather than blindly store and present it, but example 4 and 5 demonstrate
the ease with which you can use session functions to access array variables set in other pages.
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