public static function getConnection() { if (is_null(self::$dbConnection)) { $dbConnection = new mysqli(self::$mainDbLogin['server'], self::$mainDbLogin['user'], self::$mainDbLogin['passwd'], self::$mainDbLogin['db']); $dbConnection->set_charset('utf8'); self::$mainDbLogin = null; self::$adminDbLogin = null; self::$dbConnection = $dbConnection; } return self::$dbConnection; }