Валидатор не кушает сайт

# GZip
if (strstr($_SERVER['HTTP_USER_AGENT'], 'compatible') || strstr($_SERVER['HTTP_USER_AGENT'], 'Gecko')) {
	if (extension_loaded('zlib')) ob_start('ob_gzhandler');
} else {
	if (strstr($HTTP_SERVER_VARS['HTTP_ACCEPT_ENCODING'], 'gzip')) {
		if (extension_loaded('zlib')) {
			$do_gzip_compress = true;
			ob_start();
			ob_implicit_flush(0);
			Header('Content-Encoding: gzip');
		}
	}
}

if(strstr($HTTP_SERVER_VARS['HTTP_ACCEPT_ENCODING'], 'gzip') && $conf['gzip'] && extension_loaded('zlib')){
	$do_gzip_compress = true;
	ob_start();
	ob_implicit_flush(0);
	header('Content-Encoding: gzip');
}elseif(strstr($_SERVER['HTTP_USER_AGENT'], 'compatible') || strstr($_SERVER['HTTP_USER_AGENT'], 'Gecko') && $conf['gzip'] && extension_loaded('zlib')) ob_start('ob_gzhandler');

if($conf['gzip'] && $do_gzip_compress){
		$gzip_contents = ob_get_contents();
		ob_end_clean();
		$gzip_size = mb_strlen($gzip_contents);
		$gzip_crc = crc32($gzip_contents);
		$gzip_contents = gzcompress($gzip_contents, 9);
		$gzip_contents = mb_substr($gzip_contents, 0, mb_strlen($gzip_contents) - 4);
		echo '\x1f\x8b\x08\x00\x00\x00\x00\x00';
		echo $gzip_contents;
		echo pack('V', $gzip_crc);
		echo pack('V', $gzip_size);
		ob_end_flush();
	}else ob_end_clean();