What are common pitfalls to avoid when creating a registration form and login system in PHP?

One common pitfall to avoid when creating a registration form and login system in PHP is not properly sanitizing user input to prevent SQL injection attacks. To solve this issue, always use prepared statements or parameterized queries when interacting with your database to avoid SQL injection vulnerabilities. 

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

Keywords

SQL injection password hashing session management form validation CSRF protection

Related Questions