Microweber\Utils\Format::prep_url PHP Method

    public function prep_url($str = '')
    {
        if ($str === 'http://' or $str === 'https://' or $str === '') {
            return '';
        }
        $url = parse_url($str);
        if (!$url or !isset($url['scheme'])) {
            if (isset($_SERVER['HTTPS']) && $_SERVER['HTTPS'] != 'off') {
                return 'https://' . $str;
            } else {
                return 'http://' . $str;
            }
        }
        return $str;
    }