Build a Simple Chat App with PHP – Part 4: Sending and Refreshing Messages with AJAX & JavaScript

Hello, this part introduces interactivity using JavaScript and AJAX. Once logged in, users can type and send messages, which are handled without page reloads!

I've bind an event listener to the message form, capture the message input, and send it to a PHP script using an XMLHttpRequest. We also create an auto-refresh feature to fetch the latest chat messages every few seconds from a chat log.

🧱 Key Highlights in this video:

- JavaScript form submission interception
- Sending POST requests using AJAX
- Fetching chat messages via periodic polling
- Smooth message flow for the user experience

This step transforms your static chatroom into an active realtime communication tool using just JavaScript and PHP.

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Content & Creator: Kathan Agarwal