How can the PHP code for the login and registration scripts be optimized for better database connectivity?

To optimize the PHP code for login and registration scripts for better database connectivity, you can use prepared statements to prevent SQL injection attacks and improve performance by reducing the number of database queries. Additionally, you can use PDO (PHP Data Objects) for better database abstraction and security. 

// Using PDO for database connectivity
$dsn = 'mysql:host=localhost;dbname=mydatabase';
$username = 'username';
$password = 'password';

try {
    $pdo = new PDO($dsn, $username, $password);
    $pdo->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
} catch (PDOException $e) {
    die('Connection failed: ' . $e->getMessage());
}

// Using prepared statements for login
$stmt = $pdo->prepare('SELECT * FROM users WHERE username = :username AND password = :password');
$stmt->execute(['username' => $username, 'password' => $password]);
$user = $stmt->fetch();

// Using prepared statements for registration
$stmt = $pdo->prepare('INSERT INTO users (username, password) VALUES (:username, :password)');
$stmt->execute(['username' => $username, 'password' => $password]);

Keywords

PHP database connectivity optimization login script registration script

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