PHP and MySQL Web Development 4th Ed-tqw-_darksiderg

Creating a Simple Session Example
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Listing 23.2
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After you call session_start(), the variable $_SESSION [‘sess_var’] is available with
its previously stored value, as you can see in Figure 23.2.
Figure 23.2
The value of the session variable is passed along via the session
ID to page2.php.
After you have used the variable, you unset it.The session still exists, but the variable
$_SESSION[‘sess_var’] no longer exists.
Finally, you pass along to page3.php, the final script in the example.The code for this
script is shown in Listing 23.3.
Listing 23.3