admin_logout.php

```php
<?php
session_start();
session_destroy();
header('Location: admin_login.php');
exit;
```

Setup Instructions:
1. Create the database by running the SQL in database.sql
2. Change the default admin password (currently "password") by running:
   ```sql
   UPDATE admins SET password = '$2y$10$yourhashedpassword' WHERE username = 'admin';
   ```
   (Generate a new hash using `password_hash('yournewpassword', PASSWORD_BCRYPT)` in PHP)
3. Create an "uploads" directory in your project root and make it writable
4. Configure database credentials in database_connection.php
5. The system is now ready to use:
   - Public page: index.php
   - Admin login: admin_login.php (username: admin, password: password - change this!)
   - Admin dashboard: admin_dashboard.php (accessible after login)
   - Logout: admin_logout.php

Key Features:
- Secure admin authentication with password hashing
- Visitor tracking with total and live visitor counts
- Product management with image uploads
- Clean responsive design
- Protection against common security issues (SQL injection, XSS)