webmozart / path-util

        $path = static::canonicalize($path);

        // Maintain scheme

        if (false !== ($pos = strpos($path, '://'))) {

            $scheme = substr($path, 0, $pos + 3);

            $path = substr($path, $pos + 3);

        } else {

            $scheme = '';

        }

        if (false !== ($pos = strrpos($path, '/'))) {

            // Directory equals root directory "/"

        Assert::string($path, 'The path must be a string. Got: %s');

        // Maintain scheme

        if (false !== ($pos = strpos($path, '://'))) {

            $scheme = substr($path, 0, $pos + 3);

            $path = substr($path, $pos + 3);

        } else {

            $scheme = '';

        }

        // UNIX root "/" or "\" (Windows style)

        if ('/' === $path[0] || '\\' === $path[0]) {

            return static::canonicalize($path);

        }

        if (false !== ($pos = strpos($basePath, '://'))) {

            $scheme = substr($basePath, 0, $pos + 3);

            $basePath = substr($basePath, $pos + 3);

        } else {

            $scheme = '';

        }

        return $scheme.self::canonicalize(rtrim($basePath, '/\\').'/'.$path);

    }

        }

        // Remember scheme as part of the root, if any

        if (false !== ($pos = strpos($path, '://'))) {

            $root = substr($path, 0, $pos + 3);

            $path = substr($path, $pos + 3);

        } else {

            $root = '';

        }

        $length = strlen($path);