PHP通过访客来路获取搜索关键词的方法

【专家解说】：<?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; } } ?>