How can a PHP developer ensure the security of user login information when using sessions or cookies?

To ensure the security of user login information when using sessions or cookies in PHP, developers should always use secure HTTPS connections to transmit data, encrypt sensitive information before storing it, and validate user input to prevent injection attacks. 

// Use secure HTTPS connection
ini_set('session.cookie_secure', 1);
ini_set('session.cookie_httponly', 1);

// Encrypt sensitive information before storing it
$encryptedPassword = password_hash($password, PASSWORD_DEFAULT);

// Validate user input to prevent injection attacks
$username = mysqli_real_escape_string($conn, $_POST['username']);
$password = mysqli_real_escape_string($conn, $_POST['password']);

Keywords

PHP session hijacking secure cookies encryption password hashing

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