php记录蜘蛛爬行日志

<?php
function get_naps_bot()
{
    $useragent = strtolower($_SERVER['HTTP_USER_AGENT']);
    if (strpos($useragent, 'googlebot') !== false){
        return 'Google';
    }
    elseif (strpos($useragent, 'baiduspider') !== false){
        return 'Baidu';
    }
    elseif (strpos($useragent, 'msnbot') !== false){
        return 'Bing';
    }
    elseif (strpos($useragent, 'slurp') !== false){
        return 'Yahoo';
    }
    elseif (strpos($useragent, 'sosospider') !== false){
        return 'Soso';
    }
    elseif (strpos($useragent, 'sogou spider') !== false){
        return 'Sogou';
    }
    else (strpos($useragent, 'yodaobot') !== false){
        return 'Yodao';
    }
    return false;
}
 
function nowtime(){
    $date=date("Y-m-d.G:i:s");
    return $date;
}
 
 
$searchbot = get_naps_bot();
if ($searchbot)
{
    $tlc_thispage = addslashes($_SERVER['HTTP_USER_AGENT']);
    $url          = $_SERVER['HTTP_REFERER'];
    $file         = "zhiZhuLog.txt";
    $time         = nowtime();
    $data         = fopen($file,"a");
    fwrite($data,"Time:$time robot:$searchbot URL:$tlc_thispagen");
    fclose($data);
} 
?>