How can PHP be used to securely handle login credentials in a web application?

To securely handle login credentials in a web application using PHP, it is important to hash the passwords before storing them in the database. This adds an extra layer of security by ensuring that even if the database is compromised, the passwords are not easily readable. Additionally, using prepared statements with parameterized queries can help prevent SQL injection attacks. 

// Hash the password before storing it in the database
$password = password_hash($_POST['password'], PASSWORD_DEFAULT);

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

Keywords

password hashing secure authentication PHP sessions CSRF protection SQL injection prevention

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