login php mysqli bootstrap

?php session_start (); $host = "localhost"; $username = "your_username"; $password = "your_password"; $database = "login_system"; $conn = mysqli_connect ($host, $username, $password, $database); if (!$conn) { die ("Connection failed: " . stasiun play login mysqli_connect_error ()); } if ($_SERVER ["REQUEST_METHOD"] == "POST") { $username = $_POST ["username"]