Are there any common pitfalls or mistakes when working with PHP sessions that could lead to this problem?

Issue: The problem of PHP sessions not persisting across pages can occur due to forgetting to start the session or not properly setting session variables. To solve this, make sure to start the session on every page where you want to access session data and ensure that session variables are set correctly. 

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

// Set session variables
$_SESSION['username'] = 'john_doe';
$_SESSION['email'] = 'john.doe@example.com';
?>

Keywords

session_start session_destroy session_regenerate_id session hijacking session fixation

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