An Online Lodge Booking System is a web-based application that allows users to book and manage reservations for lodging properties such as hotels, motels, and bed and breakfasts.

Programming Language:

• Front End: PHP (PHP: Hypertext Preprocessor)
• Back End: MySQL

Here is an example of how an online lodge booking system in PHP might be implemented:

1. A database is used to store information about the lodging properties such as room types, prices, and availability.
2. A PHP script is used to handle the user interactions such as searching for available properties, making a reservation, and managing existing reservations.
3. A user-friendly interface is built using HTML, CSS, and JavaScript to allow users to search for properties, view room details, and make a reservation.
4. The PHP script retrieves the necessary information from the database and displays it to the user.
5. When a user makes a reservation, the PHP script updates the availability in the database and sends a confirmation email to the user.
6. An admin panel is created to allow the property owner or manager to manage the properties, room types, prices, availability and view the reservations.
7. The PHP script also implements security measures such as data validation and encryption to protect against security threats such as SQL injection and cross-site scripting attacks.
8. Payment gateway integration is done to enable users to make payments online.

Here are a few open-source options available for creating an online lodge booking system:

1. roomReservation: This is an open-source hotel booking system written in PHP. It allows users to search for available properties, view room details, and make a reservation. It also includes an admin panel for managing properties, room types, prices, and availability.
2. EasyVilla: This is an open-source vacation rental software written in PHP. It allows users to search for available properties, view room details, and make a reservation. It also includes an admin panel for managing properties, room types, prices, and availability.
3. lodgingReservation: This is an open-source hotel booking system written in PHP. It allows users to search for available properties, view room details, and make a reservation. It also includes an admin panel for managing properties, room types, prices, and availability.