Are there any common pitfalls to avoid when using PHP commands in web development?

One common pitfall to avoid when using PHP commands in web development is not properly sanitizing user input, which can leave your application vulnerable to security risks such as SQL injection attacks. To prevent this, always use prepared statements when interacting with a database to ensure that user input is properly escaped.

// Example of using prepared statements to prevent SQL injection
$stmt = $pdo->prepare('SELECT * FROM users WHERE username = :username');
$stmt->bindParam(':username', $username);
$stmt->execute();