php获取网站关键词

<?php 
$_SERVER['HTTP_REFERER']='http://www.baidu.com/s?wd=http://www.php.cn/'; 
echo save_www_iiwnet_com_keyword('http://www.baidu.com/s?wd=http://www.php.cn/','http://www.baidu.com/s?wd=http://www.php.cn/'); 
function save_www_iiwnet_com_keyword($domain,$path){ 
 if(strpos($domain, 'google.com.tw')!==false && preg_match('/q=([^&]*)/i',$path,$regs)){ 
  $searchengine = 'GOOGLE TAIWAN'; 
  $keywords = urldecode($regs[1]); // google taiwan 
    } 
 if(strpos($domain,'google.cn')!==false && preg_match('/q=([^&]*)/i',$path,$regs)){ 
  $searchengine = 'GOOGLE CHINA'; 
  $keywords = urldecode($regs[1]); // google china 
 } 
 if(strpos($domain,'google.com')!==false && preg_match('/q=([^&]*)/i',$path,$regs)){ 
  $searchengine = 'GOOGLE'; 
  $keywords = urldecode($regs[1]); // google 
 }elseif(strpos($domain,'baidu.')!==false && preg_match('/wd=([^&]*)/i',$path,$regs)){ 
        $searchengine = 'BAIDU'; 
        $keywords = urldecode($regs[1]); // baidu 
    }elseif(strpos($domain,'baidu.')!==false && preg_match('/word=([^&]*)/i',$path,$regs)){ 
        $searchengine = 'BAIDU'; 
        $keywords = urldecode($regs[1]); // baidu 
    }elseif(strpos($domain,'114.vnet.cn')!== false && preg_match('/kw=([^&]*)/i',$path,$regs)){ 
        $searchengine = 'CT114'; 
        $keywords = urldecode($regs[1]); // ct114 
    }elseif(strpos($domain,'iask.com')!==false && preg_match('/k=([^&]*)/i',$path,$regs)){ 
        $searchengine = 'IASK'; 
        $keywords = urldecode($regs[1]); // iask 
    }elseif(strpos($domain,'soso.com')!==false && preg_match('/w=([^&]*)/i',$path,$regs)){ 
  $searchengine = 'SOSO'; 
        $keywords = urldecode($regs[1]); // soso 
    }elseif(strpos($domain, 'sogou.com')!==false && preg_match('/query=([^&]*)/i',$path,$regs)){ 
        $searchengine = 'SOGOU'; 
        $keywords = urldecode($regs[1]); // sogou 
    }elseif(strpos($domain,'so.163.com')!==false && preg_match('/q=([^&]*)/i',$path,$regs)){ 
        $searchengine = 'NETEASE'; 
        $keywords = urldecode($regs[1]); // netease 
    }elseif(strpos($domain,'yodao.com')!== false && preg_match('/q=([^&]*)/i',$path,$regs)){ 
        $searchengine = 'YODAO'; 
        $keywords = urldecode($regs[1]); // yodao 
    }elseif(strpos($domain,'zhongsou.com')!==false && preg_match('/word=([^&]*)/i',$path,$regs)){ 
        $searchengine = 'ZHONGSOU'; 
        $keywords = urldecode($regs[1]); // zhongsou 
    }elseif(strpos($domain,'search.tom.com')!==false && preg_match('/w=([^&]*)/i',$path,$regs)){ 
        $searchengine = 'TOM'; 
        $keywords = urldecode($regs[1]); // tom 
    }elseif(strpos($domain,'live.com')!==false && preg_match('/q=([^&]*)/i',$path,$regs)){ 
        $searchengine = 'MSLIVE'; 
        $keywords = urldecode($regs[1]); // MSLIVE 
    }elseif(strpos($domain, 'tw.search.yahoo.com')!==false && preg_match('/p=([^&]*)/i',$path,$regs)){ 
        $searchengine = 'YAHOO TAIWAN'; 
        $keywords = urldecode($regs[1]); // yahoo taiwan 
    }elseif(strpos($domain,'cn.yahoo.')!==false && preg_match('/p=([^&]*)/i',$path,$regs)){ 
        $searchengine = 'YAHOO CHINA'; 
        $keywords = urldecode($regs[1]); // yahoo china 
    }elseif(strpos($domain,'yahoo.')!==false && preg_match('/p=([^&]*)/i',$path,$regs)){ 
        $searchengine = 'YAHOO'; 
        $keywords = urldecode($regs[1]); // yahoo 
    }elseif(strpos($domain,'msn.com.tw')!==false && preg_match('/q=([^&]*)/i',$path,$regs)){ 
        $searchengine = 'MSN TAIWAN'; 
        $keywords = urldecode($regs[1]); // msn taiwan 
    }elseif(strpos($domain,'msn.com.cn')!==false && preg_match('/q=([^&]*)/i',$path,$regs)){ 
        $searchengine = 'MSN CHINA'; 
        $keywords = urldecode($regs[1]); // msn china 
    }elseif(strpos($domain,'msn.com')!==false && preg_match('/q=([^&]*)/i',$path,$regs)){ 
        $searchengine = 'MSN'; 
        $keywords = urldecode($regs[1]); // msn 
    } 
 return $keywords; 
}