There are many real-time applications that can be built using PHP, including:
1. Chat applications: Real-time chat applications allow users to send and receive messages instantly. PHP can be used to build the backend of the application, handling user authentication, message storage, and real-time message delivery using technologies like WebSockets or AJAX long polling.
2. Real-time analytics: PHP can be used to build real-time analytics dashboards that display data in real-time. This can be done by collecting and processing data in real-time, and then pushing the updated data to the frontend using AJAX or WebSockets.
3. Real-time collaboration tools: PHP can be used to build real-time collaboration tools, such as document editing tools or project management systems. These applications allow multiple users to work together simultaneously and see each other’s changes in real-time.
4. Real-time notifications: PHP can be used to send real-time notifications to users. This can be done using technologies like WebSockets or push notifications. PHP can also be used to handle the backend logic for determining when and what notifications to send.
5. Real-time gaming: PHP can be used to build real-time multiplayer games. PHP can handle the game logic and communication between players, while technologies like WebSockets or AJAX can be used for real-time communication between players and the server.
To build these applications, PHP can be combined with other technologies like WebSockets, AJAX, and JavaScript frameworks like React or Vue.js.