php取得搜尋引擎關鍵字來源(支援百度、Google等搜尋引擎)的函數

//取得搜尋引擎入站關鍵字
//by bbs.it-home.org
function get_keyword($url,$kw_start)
{
$start=stripos($url,$kw_start);
$url=substr($url,$start+strlen($kw_start) );
$start=stripos($url,'&');
if ($start>0)
{
$start=stripos($url,'&');
$s_s_keyword=substr($url,0,$start);
}
else
{
$s_s_keyword=substr($url,0);
}
return $ s_s_keyword;
}
$url=isset($_SERVER['HTTP_REFERER'])?$_SERVER['HTTP_REFERER']:'';//取得入站url。
$search_1="google.com"; //q= utf8
$search_2="baidu.com"; //wd= gbk
$search_3="yahoo.cn"; //q= utf8
$search_4="sogou.com"; //query= gbk
$search_5="soso.com"; //w= gbk
$search_6="bing.com"; //q = utf8
$search_7="youdao.com"; //q= utf8
$google=preg_match("/b{$search_1}b/",$url);/ /記錄匹配情況，用於入站判斷。
$baidu=preg_match("/b{$search_2}b/",$url);
$yahoo=preg_match("/b{$search_3}b/",$url);
$ sogou=preg_match("/b{$search_4}b/",$url);
$soso=preg_match("/b{$search_5}b/",$url);
$bing=preg_match( "/b{$search_6}b/",$url);
$youdao=preg_match("/b{$search_7}b/",$url);
$s_s_keyword="";
 $bul=$_SERVER['HTTP_REFERER'];
//取得沒參數網域
preg_match('@^(?:http://)?([^/]+)@i',$bul ,$matches);
$burl=$matches[1];
//匹配網域設定
$curl="bbs.it-home.org";
if($burl!= $curl){
if ($google)
{//來自google
$s_s_keyword=get_keyword($url,'q=');//關鍵字前的字元為"q="。
$s_s_keyword=urldecode($s_s_keyword);
$urlname="Google：";
$_SESSION["urlname"]=$urlname;
$_SESSION["s_s_keyword"]=$s_s_keywordword ;
//$s_s_keyword=iconv("GBK","UTF-8",$s_s_keyword);//引擎為gbk
}
else if($baidu)
{//來自百度
$s_s_keyword=get_keyword($url,'wd=');//關鍵字前的字元為"wd="。
$s_s_keyword=urldecode($s_s_keyword);
$s_s_keyword=iconv("GBK","UTF-8",$s_s_keyword);//引擎為gbk
$urlname="百度：";
$_SESSION["urlname"]=$urlname;
$_SESSION["s_s_keyword"]=$s_s_keyword;
}
else if($yahoo)
{//來自雅虎
$s_s_keyword=get_keyword($url,'q=');//關鍵字前的字元為"q="。
$s_s_keyword=urldecode($s_s_keyword);
//$s_s_keyword=iconv("GBK","UTF-8",$s_s_keyword);//引擎為gbk
$urlname="雅虎：雅虎：雅虎";
$_SESSION["urlname"]=$urlname;
$_SESSION["s_s_keyword"]=$s_s_keyword;
}
else if($sogou)
{//來自搜狗
$s_s_keyword=get_keyword($url,'query=');//關鍵字前的字元為"query="。
$s_s_keyword=urldecode($s_s_keyword);
$s_s_keyword=iconv("GBK","UTF-8",$s_s_keyword);//引擎為gbk
$urlname="搜尋狗：";
$_SESSION["urlname"]=$urlname;
$_SESSION["s_s_keyword"]=$s_s_keyword;
}
else if($soso)
{//來自搜尋
$s_s_keyword=get_keyword($url,'w=');//關鍵字前的字元為"w="。
$s_s_keyword=urldecode($s_s_keyword);
$s_s_keyword=iconv("GBK","UTF-8",$s_s_keyword);//引擎為gbk
$urlname="搜尋搜尋：" ;
$_SESSION["urlname"]=$urlname;
$_SESSION["s_s_keyword"]=$s_s_keyword;
}
else if($bing)
{//來自必應
$s_s_keyword=get_keyword($url,'q=');//關鍵字前的字元為"q="。
$s_s_keyword=urldecode($s_s_keyword);
//$s_s_keyword=iconv("GBK","UTF-8",$s_s_keyword);//引擎為gbk
$urlname=" ：";
$_SESSION["urlname"]=$urlname;
$_SESSION["s_s_keyword"]=$s_s_keyword;
}
else if($youdao)
{///🎜>{//來自有道
$s_s_keyword=get_keyword($url,'q=');//關鍵字前的字元為"q="。
$s_s_keyword=urldecode($s_s_keyword);
//$s_s_keyword=iconv("GBK","UTF-8",$s_s_keyword);//引擎為gbk
$urlname="有道：";
$_SESSION["urlname"]=$urlname;
$_SESSION["s_s_keyword"]=$s_s_keyword;
}
else{
$urlname=$burl; 🎜>$s_s_keyword="";
$_SESSION["urlname"]=$urlname;
$_SESSION["s_s_keyword"]=$s_s_keyword;
}
$s_urlname=$name; 🎜>$s_urlkey=$s_s_keyword;
}
else{
$s_urlname=$_SESSION["urlname"];
$s_urlkey=$_SESSION["s_s_key_key"]
$s_urlkey=$_SESSION["s_s_key_key"]
$s_urlkey=$_SESSION["s_s_key_key"]; 🎜>?>



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