CSteganos::__UnCompressData

function __UnCompressData()
{
	if (function_exists("gzuncompress"))
	{
		$data1 = gzuncompress($this->data);
		if ($data1 && mb_substr($data1, 0, 4) == "BCDW")
			$this->data = mb_substr($data1, 4);
	}
}