What are some potential pitfalls to be aware of when implementing a user management system in PHP?

One potential pitfall when implementing a user management system in PHP is not properly sanitizing user input, which can lead to SQL injection attacks. To prevent this, always use prepared statements when interacting with a database to ensure that user input is properly escaped. 

// Using prepared statements to prevent SQL injection
$stmt = $pdo->prepare('SELECT * FROM users WHERE username = :username');
$stmt->execute(['username' => $username]);
$user = $stmt->fetch();

Keywords

SQL injection password hashing session management cross-site scripting user authentication

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