http://blog.ddian.cn/?post=868

1.[代码][PHP]代码

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'];

}

?>