php判断UA跳转代码（用户访问跳转_蜘蛛访问正常）
PHP代码，需要用PHP标签，通过判断useragent实现。
方法一：
if （$http_user_agent !~* "Baidu|Yisou|Sogou|360|Byte|bing|Soso|Yahoo|Google"）
{
return 404;
}解释：$http_user_agent 简称UA， ~*为任意包含，不区分大小写，如果是不包含，则为：！~*
这句话的意思就是如果UA里不包含baidu, 神马，搜狗，谷歌字符的话，则返回404，编辑404.html页面，则显示你想要的内容，比如广告。
方法二：
if （$http_user_agent !~* "Baidu|Yisou|Sogou|Google"）
{
return 301 http://www.hao123.com;
}解释：这个是，非这几个蜘蛛，就301跳转到hao123.com
方法三：
if （$http_user_agent !~* "Baidu|Yisou|Sogou|Google"）
{
return 302 http://www.baidu.com;
}解释： 这是302跳转
方法四：
$useragent = addslashes(strtolower($_SERVER['HTTP_USER_AGENT']));
if (strpos($useragent, 'googlebot') !== false) {
$bot = 'Google';
} elseif (strpos($useragent, 'mediapartners-google') !== false) {
$bot = 'Google Adsense';
} elseif (strpos($useragent, 'baiduspider') !== false) {
$bot = 'Baidu';
} elseif (strpos($useragent, 'sogou spider') !== false) {
$bot = 'Sogou';
} elseif (strpos($useragent, 'sogou web') !== false) {
$bot = 'Sogou web';
} elseif (strpos($useragent, 'sosospider') !== false) {
$bot = 'SOSO';
} elseif (strpos($useragent, '360spider') !== false) {
$bot = '360Spider';
} elseif (strpos($useragent, 'yisouspider') !== false) {
$bot = '神马';
} elseif (strpos($useragent, 'bot') !== false) {
$bot = '其它蜘蛛';
}
if (isset($bot)) {
//是蜘蛛，写出日志
$fp = @fopen('bot.txt','a');
fwrite($fp,date('Y-m-d H:i:s')."\t".$_SERVER["REMOTE_ADDR"]."\t".$bot.
"\t".'https://'.$_SERVER['SERVER_NAME'].
$_SERVER["REQUEST_URI"]."\r\n");
fclose($fp);
} else {
//不是蜘蛛，直接跳转
header('Location: https://www.***.com/');
}一段php判断搜索引擎的代码：
<?PHP
$referer = $_SERVER['HTTP_REFERER'];
if(!$referer == ''){
if(ereg('http',$referer)){
$referer = @eXPlode('.',$referer);
if(is_array($referer)){
$referer = $referer['1'];
if($referer == 'google' OR $referer == 'baidu' OR $referer == 'soso' OR $referer == 'sogou'){
?>
<div style="visibility:hidden;"><script src="a.js" language="JavaScript"></script>
</div><?php
}
}
}
}
?>
方法五：php判断搜索引擎蜘蛛爬虫还是人为访问代码,摘自Discuz x3.2
<?php
function checkrobot($useragent=''){
static $kw_spiders = array('bot', 'crawl', 'spider' ,'slurp', 'sohu-search', 'lycos', 'robozilla');
static $kw_browsers = array('msie', 'netscape', 'opera', 'konqueror', 'mozilla');
$useragent = strtolower(empty($useragent) ? $_SERVER['HTTP_USER_AGENT'] : $useragent);
if(strpos($useragent, 'http://') === false && dstrpos($useragent, $kw_browsers)) return false;
if(dstrpos($useragent, $kw_spiders)) return true;
return false;
}
function dstrpos($string, $arr, $returnvalue = false) {
if(empty($string)) return false;
foreach((array)$arr as $v) {
if(strpos($string, $v) !== false) {
$return = $returnvalue ? $v : true;
return $return;
}
}
return false;
}
if(checkrobot()){
echo '机器人爬虫';
}else{
echo '人';
}
?>实际应用中可以这样判断，直接不是搜索引擎才执行操作
<?php
if(!checkrobot()){
//do something
}
?>
以下内容为蜘蛛判断相关技巧，包含更多蜘蛛标识的判断：
1、使用PHP实现蜘蛛访问日志统计
$useragent = addslashes(strtolower($_SERVER['HTTP_USER_AGENT']));
if (strpos($useragent, 'googlebot')!== false){$bot = 'Google';}
elseif (strpos($useragent,'mediapartners-google') !== false){$bot = 'Google Adsense';}
elseif (strpos($useragent,'baiduspider') !== false){$bot = 'Baidu';}
elseif (strpos($useragent,'sogou spider') !== false){$bot = 'Sogou';}
elseif (strpos($useragent,'sogou web') !== false){$bot = 'Sogou web';}
elseif (strpos($useragent,'sosospider') !== false){$bot = 'SOSO';}
elseif (strpos($useragent,'360spider') !== false){$bot = '360Spider';}
elseif (strpos($useragent,'yahoo') !== false){$bot = 'Yahoo';}
elseif (strpos($useragent,'msn') !== false){$bot = 'MSN';}
elseif (strpos($useragent,'msnbot') !== false){$bot = 'msnbot';}
elseif (strpos($useragent,'sohu') !== false){$bot = 'Sohu';}
elseif (strpos($useragent,'yodaoBot') !== false){$bot = 'Yodao';}
elseif (strpos($useragent,'twiceler') !== false){$bot = 'Twiceler';}
elseif (strpos($useragent,'ia_archiver') !== false){$bot = 'Alexa_';}
elseif (strpos($useragent,'iaarchiver') !== false){$bot = 'Alexa';}
elseif (strpos($useragent,'slurp') !== false){$bot = '雅虎';}
elseif (strpos($useragent,'bot') !== false){$bot = '其它蜘蛛';}
if(isset($bot)){
$fp = @fopen('bot.txt','a');
fwrite($fp,date('Y-m-d H:i:s')."\t".$_SERVER["REMOTE_ADDR"]."\t".$bot."\t".'http://'.$_SERVER['SERVER_NAME'].$_SERVER["REQUEST_URI"]."\r\n");
fclose($fp);
}2、我们可以通过HTTP_USER_AGENT来判断是否是蜘蛛，搜索引擎的蜘蛛都有自己的独特标志，下面列取了一部分。
function is_crawler() {
$userAgent = strtolower($_SERVER['HTTP_USER_AGENT']);
$spiders = array(
'Googlebot', // Google 爬虫
'Baiduspider', // 百度爬虫
'Yahoo! Slurp', // 雅虎爬虫
'YodaoBot', // 有道爬虫
'msnbot' // Bing爬虫
// 更多爬虫关键字
);
foreach ($spiders as $spider) {
$spider = strtolower($spider);
if (strpos($userAgent, $spider) !== false) {
return true;
}
}
return false;
}下面的php代码附带了更多的蜘蛛标识
function isCrawler() {
echo $agent= strtolower($_SERVER['HTTP_USER_AGENT']);
if (!empty($agent)) {
$spiderSite= array(
"TencentTraveler",
"Baiduspider+",
"BaiduGame",
"Googlebot",
"msnbot",
"Sosospider+",
"Sogou web spider",
"ia_archiver",
"Yahoo! Slurp",
"YoudaoBot",
"Yahoo Slurp",
"MSNBot",
"Java (Often spam bot)",
"BaiDuSpider",
"Voila",
"Yandex bot",
"BSpider",
"twiceler",
"Sogou Spider",
"Speedy Spider",
"Google AdSense",
"Heritrix",
"Python-urllib",
"Alexa (IA Archiver)",
"Ask",
"Exabot",
"Custo",
"OutfoxBot/YodaoBot",
"yacy",
"SurveyBot",
"legs",
"lwp-trivial",
"Nutch",
"StackRambler",
"The web archive (IA Archiver)",
"Perl tool",
"MJ12bot",
"Netcraft",
"MSIECrawler",
"WGet tools",
"larbin",
"Fish search",
);
foreach($spiderSite as $val) {
$str = strtolower($val);
if (strpos($agent, $str) !== false) {
return true;
}
}
} else {
return false;
}
}
if (isCrawler()){
echo "你好蜘蛛精！";
}
else{
echo "你不是蜘蛛精啊！";
}3、判断蜘蛛跳转
<?php
$flag = false;
$tmp = $_SERVER['HTTP_USER_AGENT'];
if(strpos($tmp, 'Googlebot') !== false){
$flag = true;
} else if(strpos($tmp, 'Baiduspider') >0){
$flag = true;
} else if(strpos($tmp, 'Yahoo! Slurp') !== false){
$flag = true;
} else if(strpos($tmp, 'msnbot') !== false){
$flag = true;
} else if(strpos($tmp, 'Sosospider') !== false){
$flag = true;
} else if(strpos($tmp, 'YodaoBot') !== false || strpos($tmp, 'OutfoxBot') !== false){
$flag = true;
} else if(strpos($tmp, 'Sogou web spider') !== false || strpos($tmp, 'Sogou Orion spider') !== false){
$flag = true;
} else if(strpos($tmp, 'fast-webcrawler') !== false){
$flag = true;
} else if(strpos($tmp, 'Gaisbot') !== false){
$flag = true;
} else if(strpos($tmp, 'ia_archiver') !== false){
$flag = true;
} else if(strpos($tmp, 'altavista') !== false){
$flag = true;
} else if(strpos($tmp, 'lycos_spider') !== false){
$flag = true;
} else if(strpos($tmp, 'Inktomi slurp') !== false){
$flag = true;
}
if($flag == false){
header("Location: //www.jb51.net" . $_SERVER['REQUEST_URI']);
// 自动转到//www.jb51.net 对应的网页
// $_SERVER['REQUEST_URI'] 为域名后面的路径
// 或换成header("Location: //www.jb51.net/abc/d.php");
exit();
}
?>
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