public static function slash(string ...$sections)
    {
        $count = count($sections);

        // If we only got a single section, return it.
        if (1 === $count) {
            return $sections[0];
        } // Somehow we got NO sections, so return null.
        elseif (0 >= $count || empty($sections)) {
            return null;
        } // Only two sections; concatenated and return!
        elseif (2 === $count) {
            $compiled = sprintf(
                "%s%s%s",
                trim($sections[0]),
                DIRECTORY_SEPARATOR,
                trim($sections[1])
            );
            // Check for double-slashes
            return preg_replace(
                '/\\\\{2,}|\/{2,}/',
                DIRECTORY_SEPARATOR,
                $compiled
            );
        } // Multiple sections, so let's get recursive!
        else {
            $append = array_shift($sections);
            $prepend = array_shift($sections);
            $compiled = static::slash($append, $prepend);

            return static::slashAr(array_merge([$compiled], $sections));
        }
    }