What are some best practices for implementing chat functionality in PHP to ensure a smooth user experience?

Issue: To ensure a smooth user experience when implementing chat functionality in PHP, it is important to consider factors such as real-time updates, message delivery, and user authentication. Code snippet: 

// Ensure real-time updates using AJAX polling or WebSockets
// Implement message delivery with a database to store and retrieve messages
// Use user authentication to verify users and protect chat data

Keywords

Websockets AJAX Real-time communication PHP chat libraries User experience

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