protected function __construct($hostname, $username, $password, $db_name = null)
{
self::$hostname = $hostname;
self::$username = $username;
self::$password = $password;
self::$db_name = $db_name;
self::$conn = mysqli_connect(self::$hostname, self::$username, self::$password);
if (!self::$conn) {
die('Critical Stop Error: Database Error<br />' . mysqli_error(self::$conn));
}
if ($db_name) {
$selected_db = mysqli_select_db(self::$conn, $db_name);
if (!$selected_db) {
die('Cant select database');
}
}
}
