PHP判断搜索引擎蜘蛛访问屏蔽或跳转示例代码

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PHP判断搜索引擎蜘蛛访问屏蔽或跳转示例代码，代码收集于互联网，都是通过判断HTTP请求头进行处理，之前发过一个使用JS的：JavaScript判断搜索引擎蜘蛛访问屏蔽或跳转特定内容代码。下面直接看示例代码吧：

示例代码一

<?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

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
}
?>

示例代码二

$useragent = addslashes(strtolower($_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, '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".'http://'.$_SERVER['SERVER_NAME'].
          $_SERVER["REQUEST_URI"]."\r\n");
     fclose($fp);
} else {
    //不是蜘蛛，直接跳转
    header('Location: http://www.baidu.com/');
}

示例代码三

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;
}

示例代码四

<?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:https://www.linfengnet.com" . $_SERVER['REQUEST_URI']);
  // 自动转到https://www.linfengnet.com/ 对应的网页
  // $_SERVER['REQUEST_URI'] 为域名后面的路径
  // 或换成header("Location://www.linfengnet.com");
  exit();
}
?>

上面这个代码使用到了PHP header()函数，你可以看看相关的内容：

PHP header() 函数 | 菜鸟教程

关于header(‘location:url’)的一些说明,php缓冲区_weixin_30553837的博客-CSDN博客

搜索引擎蜘蛛UA信息数组（array）

下面这个数组包含了很多搜索引擎蜘蛛的数组，可以配合上述示例代码一起使用。

$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",
        );