How can session values be properly passed in PHP when redirecting users based on input?

When redirecting users based on input in PHP, session values can be properly passed by storing them in the $_SESSION superglobal before redirecting the user. This ensures that the session values are retained across different pages. 

<?php
session_start();

// Set session value based on input
$_SESSION['username'] = $_POST['username'];

// Redirect user to another page
header('Location: another_page.php');
exit;
?>

Keywords

session values redirecting users PHP input passing

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