private static function basename($path)
    {
        $separators = DIRECTORY_SEPARATOR === '/' ? '/' : '\/';

        $path = rtrim($path, $separators);

        $basename = preg_replace('#.*?([^' . preg_quote($separators, '#') . ']+$)#', '$1', $path);

        if (DIRECTORY_SEPARATOR === '/') {
            return $basename;
        }
        // @codeCoverageIgnoreStart
        // Extra Windows path munging. This is tested via AppVeyor, but code
        // coverage is not reported.

        // Handle relative paths with drive letters. c:file.txt.
        while (preg_match('#^[a-zA-Z]{1}:[^\\\/]#', $basename)) {
            $basename = substr($basename, 2);
        }

        // Remove colon for standalone drive letter names.
        if (preg_match('#^[a-zA-Z]{1}:$#', $basename)) {
            $basename = rtrim($basename, ':');
        }

        return $basename;
        // @codeCoverageIgnoreEnd
    }