Game development with PHP involves creating games using the PHP programming language. PHP is a popular server-side scripting language that is often used for web development, but it can also be used to build games.

There are several frameworks and libraries available for game development with PHP, such as Phaser, Panda.js, and LÖVE-PHP. These frameworks provide tools and features for building games, including graphics rendering, physics simulation, and input handling.

Here are some steps to get started with game development using PHP:

1. Install a PHP development environment: Set up a local development environment with PHP installed. This may involve installing a web server like Apache or Nginx, along with PHP and a database if necessary.

2. Choose a game development framework: Select a game development framework or library that works well with PHP. Some popular options include Phaser, Panda.js, and LÖVE-PHP. Look for frameworks that have good documentation and an active community for support.

3. Learn the basics of game development: Familiarize yourself with the fundamentals of game development, including concepts such as game loops, rendering, collision detection, and game states. Online tutorials, books, and video courses can be helpful resources for learning these concepts.

4. Start building your game: Begin by designing the structure of your game, including the game world, characters, levels, and mechanics. Use the features provided by your chosen framework to implement the graphics, physics, and gameplay elements of your game.

5. Test and debug your game: As you build your game, test it regularly to identify and fix any bugs or issues. Pay attention to performance optimization to ensure that your game runs smoothly.

6. Publish and distribute your game: Once your game is complete, package it for distribution and consider publishing it on platforms such as Steam, the App Store, or Google Play. Make sure to follow the platform’s guidelines for submission and consider marketing your game to reach a wider audience.

Remember, game development is a complex process that requires a combination of programming skills, creativity, and problem-solving abilities. Be prepared to iterate on your game design and make adjustments as you go.