PHP技巧：PHP版iis日志分析程序

/*******************************************************
*功能:iis日志分析,分析出访问ip总数,搜索引擎抓取次数
*说明:
*       将日志文件放在网站根目录,并改名为log.log。
*演示:http://www.zhanzhangpu/tools/iislog/
*       http://www.zhanzhangpu/tools/iislog/demo.gif
*作者:blackli,来自落伍者
*问题:搜索引擎蜘蛛地址不准确，尤其是google蜘蛛地址，国内流行的地址列
*       表存在相当大的误差,能力有限,不能够解决这个问题。有兴趣的可以参考
*       下面的网址.
*参考:http://www.SEOnewthing/googleBotCheck.aspx
*       http://googlewebmastercentral.blogspot/2006/09/how-to-verify-googlebot.html
*******************************************************/

        //打开日志文件
        $DOCUMENT_ROOT = $_SERVER['DOCUMENT_ROOT'];
        $fp = fopen("$DOCUMENT_ROOT/log.log",'rb');
        if ( !$fp )
        {
                echo '打开文件失败';
                exit;
        }

        //分析每行日志
        $num_ip = 0;    //访问IP总数
        $ip = array();    //IP数据数组,其中ip[$i][0]为IP地址、ip[$i][1]为该地址出现次数
        while ( !feof($fp) )
        {
                $line = fgets($fp,1001);
                if ( substr($line,0,1) == '#' )
                {
                        //获取日志生成时间
                        if ( substr($line,0,5) == '#Date' )
                        {
                                $date_info = explode(' ',$line);
                                //echo '日志生成时间:'.$date_info[1].'  '.$date_info[2].'
';
                        }
                }
                else
                {
                        //获取访问IP
                        if ( $line == '' ) continue;
                        $ip_info = explode(' ',$line);

                        for ( $j = $num_ip-1, $having_ip = false; $j >= 0 ; $j -- )
                        {
                                if ( $ip[$j][0] == $ip_info[6] )
                                {
                                        $having_ip = true;
                                        $ip[$j][1] ++ ;
                                        break;
                                }
                        }
                        if ( $having_ip == false )
                        {
                                $ip[$num_ip][0] = $ip_info[6];
                                $ip[$num_ip][1] = 1;
                                $num_ip ++;
                        }
                }
        }

        //获取搜索引擎蜘蛛访问次数
        //baidu、google蜘蛛地址列表
        $baiduSpider = array('220.181','159.226','202.108','61.135.');
        $googleBot = array('74.125.','209.85.','66.102.','64.233.','64.249','209.85.');

        $num_Spider = $num_googleBot = 0;
        for ( $i = 0; $i < $num_ip ; $i++ )
        {
                //计算百度蜘蛛访问次数
                for ( $j = 0 ; $j < 4 ; $j ++ )
                {

                        if ( substr($ip[$i][0],0,7) == $baiduSpider[$j] )
                        {
                                $num_Spider += $ip[$i][1];
                                continue;
                        }
                }
                //计算google蜘蛛访问次数
                for ( $j = 0 ; $j < 6 ; $j ++ )
                {
                        if ( substr($ip[$i][0],0,7) == $googleBot[$j] )
                        {
                                $num_googleBot += $ip[$i][1];
                                continue;
                        }
                }
        }

        //echo '百度蜘蛛请求'.$num_Spider.'次
';
        //echo 'google蜘蛛请求'.$num_googleBot.'次
';
        fclose($fp);
?>

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