Pico::getBaseUrl PHP Method

    public function getBaseUrl()
    {
        $baseUrl = $this->getConfig('base_url');
        if (!empty($baseUrl)) {
            return $baseUrl;
        }
        $protocol = 'http';
        if (!empty($_SERVER['HTTP_X_FORWARDED_PROTO'])) {
            $secureProxyHeader = strtolower(current(explode(',', $_SERVER['HTTP_X_FORWARDED_PROTO'])));
            $protocol = in_array($secureProxyHeader, array('https', 'on', 'ssl', '1')) ? 'https' : 'http';
        } elseif (!empty($_SERVER['HTTPS']) && $_SERVER['HTTPS'] !== 'off') {
            $protocol = 'https';
        } elseif ($_SERVER['SERVER_PORT'] == 443) {
            $protocol = 'https';
        }
        $host = $_SERVER['SERVER_NAME'];
        if (!empty($_SERVER['HTTP_X_FORWARDED_HOST'])) {
            $host = $_SERVER['HTTP_X_FORWARDED_HOST'];
        } elseif (!empty($_SERVER['HTTP_HOST'])) {
            $host = $_SERVER['HTTP_HOST'];
        }
        $this->config['base_url'] = $protocol . "://" . $host . rtrim(dirname($_SERVER['SCRIPT_NAME']), '/\\') . '/';
        return $this->getConfig('base_url');
    }