进来在做seo的时候发现不少虚拟主机都没有提供日志功能！还好这个难不倒我。以前写的[seo大包日志分析，抓取搜索引擎爬行痕迹的代码]  这是ASP的。下面的就是php的了

function get_naps_bot()
{
$useragent = strtolower($_SERVER['HTTP_USER_AGENT']);
if (strpos($useragent, 'googlebot') !== false){
return 'Googlebot';
}

if (strpos($useragent, 'baiduspider') !== false){
return 'Baiduspider';
}

return false;
}

function nowtime(){
date_default_timezone_set('Asia/Shanghai');
$date=date("Y-m-d.G:i:s");
return $date;
}

$searchbot = get_naps_bot();

if ($searchbot) {
$inurl='null';
$inurl=$_SERVER['HTTP_REFERER'];
$file="robotlog.txt";
$time=nowtime();
$url_this ="http://".$_SERVER ['HTTP_HOST'].$_SERVER['PHP_SELF']."?".$_SERVER['QUERY_STRING'];
$data=fopen($file,"a");
fwrite($data,"Time:$time robot:$searchbot inlink:{$inurl} url_this:{$url_this} \r\n");
fclose($data);
}