PHP获取来路域名 关键字

function keywords($url){

           $spier=array('baidu.'=>'百度','google.'=>'谷歌','soso.'=> '搜搜','sogou.'=>'搜狗','www.haosou.com'=>'360');

        $q=array('百度'=>'/wd=([^&]*)/i','谷歌'=>'/q=([^&]*)/i ','360'=>'/q=(.*)/i','搜狗'=>'/query=([^&]*)/i','搜搜'=>'/w=([^&]*)/i');
            foreach($spier as $k=>$v){

                if(strpos($url,$k)){
                    preg_match("{$q[$v]}",$url,$b);
                    if($v=='搜搜'||$v=='搜狗'){
                        $keywords=iconv('GBK','UTF-8',urldecode($b[1]));
                    }else{

                        $keywords=urldecode($b[1]);
                       
                    }
                     
                    echo "<br>来自{$v}的关键字:".$keywords.'<br>';
                }
            }  
    }

 

 

调用方法：echo $this->keywords($_SERVER['HTTP_REFERER']);//$_SERVER['HTTP_REFERER']获取上一级的url