PHP通过访客来路获取搜索关键词的方法

发布时间：2014-09-05 10:43:15作者：知识屋

[php]
<?php

class keyword{

    public function getKeyword($referer){
        if(strpos($referer,"http://www.baidu.com")> -1 ){
            $keyword = $this->getbaidukeyword($referer);
        }else if(strpos($referer,"http://www.google.com")> -1 ){
            $keyword = $this->getgooglekeyword($referer);
        }else if(strpos($referer,"http://www.soso.com")> -1 ){
            $keyword = $this->getsosokeyword($referer);
        }else if(strpos($referer,"http://www.sogou.com")> -1 ){
            $keyword = $this->getsogoukeyword($referer);
        }

        return $keyword;
    }

    //由来路取得百度关键词
    private function getbaidukeyword($str){
        $s = strpos($str,'wd=');
        if($s>-1){
            $str = substr($str,$s+3);
            $e = strpos($str,'&');
            if($e>-1){
                $str = substr($str,0,$e);
            }
            $str = rawurldecode($str);
        }
        return $str;
    }
    //获得谷歌关键词
    private function getgooglekeyword($str){
        $s = strpos($str,'&q=');
        if($s>-1){
            $str = substr($str,$s+3);
            $e = strpos($str,'&');
            if($e>-1){
                $str = substr($str,0,$e);
            }
            $str = rawurldecode($str);
        }
        return $str;
    }
    //获得SOSO关键词
    private function getsosokeyword($str){
        $s = strpos($str,'?w=');
        if($s>-1){
            $str = substr($str,$s+3);
            $e = strpos($str,'&');
            if($e>-1){
                $str = substr($str,0,$e);
            }
            $str = rawurldecode($str);
        }else{
            $s = strpos($str,'&w=');
            if($s>-1){
                $str = substr($str,$s+3);
                $e = strpos($str,'&');
                if($e>-1){
                    $str = substr($str,0,$e);
                }
                $str = rawurldecode($str);
            }
        }
        return $str;
    }
    //获得sogou关键词
    private function getsogoukeyword($str){
        $s = strpos($str,'query=');
        if($s>-1){
            $str = substr($str,$s+6);
            $e = strpos($str,'&');
            if($e>-1){
                $str = substr($str,0,$e);
            }
            $str = rawurldecode($str);
        }
        return $str;
    }

}

?>

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