PHP gets search engine keywords

This article mainly introduces PHP to obtain search engine keywords, which has certain reference value. Now I share it with everyone. Friends in need can refer to it

Sometimes we need to know which search engine the user passes , by accessing our page with a keyword, of course js can also be implemented. Here is an introduction to the PHP implementation code, including the acquisition methods of several major search engines (Baidu, Google, Yahoo, Sogou, Soso, Bing, Youdao) . QQ friend list acquisition

//获取来自搜索引擎入站时的关键词 
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']:'';//获取入站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);//记录匹配情况，用于入站判断。 
$baidu=preg_match("/\b{$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']; 
//获取没参数域名 
preg_match('@^(?:http://)?([^/]+)@i',$bul,$matches); 
$burl=$matches[1]; 
//匹配域名设置 
$curl="www.netxu.com"; 
if($burl!=$curl){ 
if ($google) 
{//来自google 
$s_s_keyword=get_keyword($url,'q=');//关键词前的字符为"q="。 
$s_s_keyword=urldecode($s_s_keyword); 
$urlname="谷歌："; 
$_SESSION["urlname"]=$urlname; 
$_SESSION["s_s_keyword"]=$s_s_keyword; 
//$s_s_keyword=iconv("GBK","UTF-8",$s_s_keyword);//引擎为gbk 
} 
else if($baidu) 
{//来自百度 
$s_s_keyword=get_keyword($url,'wd=');//关键词前的字符为"wd="。 
$s_s_keyword=urldecode($s_s_keyword); 
$s_s_keyword=iconv("GBK","UTF-8",$s_s_keyword);//引擎为gbk 
$urlname="百度："; 
$_SESSION["urlname"]=$urlname; 
$_SESSION["s_s_keyword"]=$s_s_keyword; 
} 
else if($yahoo) 
{//来自雅虎 
$s_s_keyword=get_keyword($url,'q=');//关键词前的字符为"q="。 
$s_s_keyword=urldecode($s_s_keyword); 
//$s_s_keyword=iconv("GBK","UTF-8",$s_s_keyword);//引擎为gbk 
$urlname="雅虎："; 
$_SESSION["urlname"]=$urlname; 
$_SESSION["s_s_keyword"]=$s_s_keyword; 
} 
else if($sogou) 
{//来自搜狗 
$s_s_keyword=get_keyword($url,'query=');//关键词前的字符为"query="。 
$s_s_keyword=urldecode($s_s_keyword); 
$s_s_keyword=iconv("GBK","UTF-8",$s_s_keyword);//引擎为gbk 
$urlname="搜狗："; 
$_SESSION["urlname"]=$urlname; 
$_SESSION["s_s_keyword"]=$s_s_keyword; 
} 
else if($soso) 
{//来自搜搜 
$s_s_keyword=get_keyword($url,'w=');//关键词前的字符为"w="。 
$s_s_keyword=urldecode($s_s_keyword); 
$s_s_keyword=iconv("GBK","UTF-8",$s_s_keyword);//引擎为gbk 
$urlname="搜搜："; 
$_SESSION["urlname"]=$urlname; 
$_SESSION["s_s_keyword"]=$s_s_keyword; 
} 
else if($bing) 
{//来自必应 
$s_s_keyword=get_keyword($url,'q=');//关键词前的字符为"q="。 
$s_s_keyword=urldecode($s_s_keyword); 
//$s_s_keyword=iconv("GBK","UTF-8",$s_s_keyword);//引擎为gbk 
$urlname="必应："; 
$_SESSION["urlname"]=$urlname; 
$_SESSION["s_s_keyword"]=$s_s_keyword; 
} 
else if($youdao) 
{//来自有道 
$s_s_keyword=get_keyword($url,'q=');//关键词前的字符为"q="。 
$s_s_keyword=urldecode($s_s_keyword); 
//$s_s_keyword=iconv("GBK","UTF-8",$s_s_keyword);//引擎为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; 
} 
$s_urlname=$urlname; 
$s_urlkey=$s_s_keyword; 
} 
else{ 
$s_urlname=$_SESSION["urlname"]; 
$s_urlkey=$_SESSION["s_s_keyword"]; 
}

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