PHP Sessions Explained: Session Fixation, Regeneration & Storage

Configuring Bulletproof Session Security

Configure session options before calling session_start():

<?php
session_start([
    'cookie_lifetime' => 7200,
    'cookie_secure'   => true,     // Enforce HTTPS
    'cookie_httponly' => true,     // Block JavaScript access
    'cookie_samesite' => 'Lax',    // Prevent cross-site leakage
    'use_strict_mode' => true,     // Reject uninitialized session IDs
]);