Manager::getUrlFromFile

static function getUrlFromFile($file)
{
	if (
		mb_substr($file, 0, 1) == '/' &&
		mb_substr($file, 0, 2) != '//' &&
		self::getHttpHost()
	)
	{
		return '//' .
			   self::getHttpHost() .
			   $file;
	}
	else
	{
		return $file;
	}
}