How can PHP sessions help maintain variable values throughout a script?

PHP sessions can help maintain variable values throughout a script by storing the variables on the server and associating them with a unique session ID. This allows the variables to persist across multiple pages or requests within the same session. To use sessions in PHP, you need to start the session with session_start() at the beginning of the script and then store and access variables using the $_SESSION superglobal array. 

<?php
// Start the session
session_start();

// Set a session variable
$_SESSION['username'] = 'john_doe';

// Access the session variable
echo $_SESSION['username'];
?>

Keywords

PHP sessions variable values script session_start() $_SESSION

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