php获取从百度、谷歌等搜索引擎进入网站关键词

<?php function search_word_from() { $referer = isset($_SERVER['HTTP_REFERER'])?$_SERVER['HTTP_REFERER']:''; if(strstr( $referer, 'baidu.com')){ //百度 preg_match( "|baidu.+wo?r?d=([^\\&]*)|is", $referer, $tmp ); $keyword = urldecode( $tmp[1] ); $from = 'baidu'; }elseif(strstr( $referer, 'google.com') or strstr( $referer, 'google.cn')){ //谷歌 preg_match( "|google.+q=([^\\&]*)|is", $referer, $tmp ); $keyword = urldecode( $tmp[1] ); $from = 'google'; }elseif(strstr( $referer, 'so.com')){ //360搜索 preg_match( "|so.+q=([^\\&]*)|is", $referer, $tmp ); $keyword = urldecode( $tmp[1] ); $from = '360'; }elseif(strstr( $referer, 'sogou.com')){ //搜狗 preg_match( "|sogou.com.+query=([^\\&]*)|is", $referer, $tmp ); $keyword = urldecode( $tmp[1] ); $from = 'sogou'; }elseif(strstr( $referer, 'soso.com')){ //搜搜 preg_match( "|soso.com.+w=([^\\&]*)|is", $referer, $tmp ); $keyword = urldecode( $tmp[1] ); $from = 'soso'; }else { $keyword =''; $from = ''; } return array('keyword'=>$keyword,'from'=>$from); } //以下为测试 //在搜索引擎搜索个关键词，进入网站 $word = search_word_from(); if(!empty($word['keyword'])){ echo '关键字：'.$word['keyword'].' 来自：'.$word['from']; } ?>