What are the best practices for managing session data in PHP to avoid conflicts or unexpected behavior?

When managing session data in PHP, it is important to avoid conflicts or unexpected behavior by properly handling session variables. One way to do this is by using session_start() at the beginning of each script that accesses session data and ensuring that session variables are properly set, updated, and unset when no longer needed. It is also recommended to use session_regenerate_id() to prevent session fixation attacks. 

<?php
session_start();

// Set session variables
$_SESSION['user_id'] = 123;
$_SESSION['username'] = 'john_doe';

// Update session variables
$_SESSION['username'] = 'jane_smith';

// Unset session variables
unset($_SESSION['user_id']);

// Regenerate session ID
session_regenerate_id();

// Destroy session
session_destroy();
?>

Keywords

session data PHP conflicts unexpected behavior management

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