PackIt/admin/auth.php

<?php
// auth.php – shared admin authentication helper
// Include at the top of every admin page.

require_once __DIR__ . '/../db.php';

session_name('packit_admin');
session_start();

define('ADMIN_LOGGED_IN', isset($_SESSION['admin_logged_in']) && $_SESSION['admin_logged_in'] === true);

function require_admin(): void {
    if (!ADMIN_LOGGED_IN) {
        header('Location: ' . admin_url('login.php'));
        exit;
    }
}

function admin_url(string $page): string {
    return $page;
}

function admin_logout(): void {
    $_SESSION = [];
    session_destroy();
    header('Location: login.php');
    exit;
}