PHP屏蔽蜘蛛访问代码及常用搜索引擎的HTTP_USER_AGENT

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; }

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！"; }

$useragent = addslashes(strtolower($_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"]."rn"); fclose($fp); }