What are some common pitfalls when implementing a basic chat functionality in PHP?

One common pitfall when implementing basic chat functionality in PHP is not properly sanitizing user input, leaving the application vulnerable to cross-site scripting attacks. To solve this issue, always use functions like htmlspecialchars() to escape user input before displaying it. 

// Sanitize user input before displaying it
$message = htmlspecialchars($_POST['message']);
echo $message;

Keywords

SQL injection XSS attacks session management real-time communication WebSocket.

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