What are common pitfalls for beginners in PHP programming, particularly when handling user authentication and database interactions?

One common pitfall for beginners in PHP programming when handling user authentication is storing passwords in plain text. To solve this issue, passwords should be securely hashed using functions like password_hash() and password_verify(). Another common pitfall is not sanitizing user input when interacting with a database, which can lead to SQL injection attacks. To prevent this, always use prepared statements when querying the database. 

// Storing passwords securely using password_hash()
$password = "password123";
$hashed_password = password_hash($password, PASSWORD_DEFAULT);

// Verifying passwords using password_verify()
$entered_password = "password123";
if (password_verify($entered_password, $hashed_password)) {
    echo "Password is correct";
} else {
    echo "Password is incorrect";
}

// Using prepared statements to sanitize user input when interacting with a database
$stmt = $pdo->prepare("SELECT * FROM users WHERE username = :username");
$stmt->bindParam(':username', $username);
$stmt->execute();

Keywords

SQL injection password hashing prepared statements session management PDO.

Related Questions