private function isAbsolutePath(string $file) : bool
{
return $file[0] === '/' || $file[0] === '\\' || strlen($file) > 3 && ctype_alpha($file[0]) && $file[1] === ':' && ($file[2] === '\\' || $file[2] === '/') || null !== parse_url($file, PHP_URL_SCHEME);
}