PHP function to obtain search engine keyword sources (supports search engines such as Baidu and Google)

//Get inbound keywords from search engines
//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']:'';//Get inbound 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);//Record the matching situation for inbound judgment.
$baidu=preg_match("/b{$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'];
//Get it? Parameter domain name
preg_match('@^(?:http://)?([^/]+)@i',$bul,$matches);
$burl=$matches[1];
//Matching domain name Set
$curl="bbs.it-home.org";
if($burl!=$curl){
if ($google)
{//from google
$s_s_keyword=get_keyword($url,'q= ');//The character before the keyword is "q=".
$s_s_keyword=urldecode($s_s_keyword);
$urlname="Google:";
$_SESSION["urlname"]=$urlname;
$_SESSION["s_s_keyword"]=$s_s_keyword;
//$s_s_keyword=iconv ("GBK","UTF-8",$s_s_keyword);//The engine is gbk
}
else if($baidu)
{//From Baidu
$s_s_keyword=get_keyword($url,'wd='); //The character before the keyword is "wd=".
$s_s_keyword=urldecode($s_s_keyword);
$s_s_keyword=iconv("GBK","UTF-8",$s_s_keyword);//The engine is gbk
$urlname="Baidu:";
$_SESSION["urlname "]=$urlname;
$_SESSION["s_s_keyword"]=$s_s_keyword;
}
else if($yahoo)
{//From Yahoo
$s_s_keyword=get_keyword($url,'q=');// The character before the keyword is "q=".
$s_s_keyword=urldecode($s_s_keyword);
//$s_s_keyword=iconv("GBK","UTF-8",$s_s_keyword);//The engine is gbk
$urlname="Yahoo:";
$_SESSION[ "urlname"]=$urlname;
$_SESSION["s_s_keyword"]=$s_s_keyword;
}
else if($sogou)
{//From Sogou
$s_s_keyword=get_keyword($url,'query='); //The character before the keyword is "query=".
$s_s_keyword=urldecode($s_s_keyword);
$s_s_keyword=iconv("GBK","UTF-8",$s_s_keyword);//The engine is gbk
$urlname="Sogou:";
$_SESSION["urlname "]=$urlname;
$_SESSION["s_s_keyword"]=$s_s_keyword;
}
else if($soso)
{//From Soso
$s_s_keyword=get_keyword($url,'w=');/ /The character before the keyword is "w=".
$s_s_keyword=urldecode($s_s_keyword);
$s_s_keyword=iconv("GBK","UTF-8",$s_s_keyword);//The engine is gbk
$urlname="Soso:";
$_SESSION[" urlname"]=$urlname;
$_SESSION["s_s_keyword"]=$s_s_keyword;
}
else if($bing)
{//From Bing
$s_s_keyword=get_keyword($url,'q='); //The character before the keyword is "q=".
$s_s_keyword=urldecode($s_s_keyword);
//$s_s_keyword=iconv("GBK","UTF-8",$s_s_keyword);//The engine is gbk
$urlname="Bing:";
$_SESSION ["urlname"]=$urlname;
$_SESSION["s_s_keyword"]=$s_s_keyword;
}
else if($youdao)
{//From Youdao
$s_s_keyword=get_keyword($url,'q=' );//The character before the keyword is "q=".
$s_s_keyword=urldecode($s_s_keyword);
//$s_s_keyword=iconv("GBK","UTF-8",$s_s_keyword);//The engine is gbk
$urlname="Youdao:";
$_SESSION ["urlname"]=$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"];
}
?>

Note: When processing, remember to deal with the encoding issue, because different search engines may return results in GBK, while others may be in UTF-8 format.

Function 2, this is also good, you can try it. code show as below:

//Get the entry keyword of the search engine
$_SERVER['HTTP_REFERER']='http://www.baidu.com/s?wd=http://bbs. it-home.org';
echo save_www_iiwnet_com_keyword('http://www.baidu.com/s?wd=http://bbs.it-home.org','http://www.baidu.com/ s?wd=http://bbs.it-home.org');
function save_www_iiwnet_com_keyword($domain,$path){
if(strpos($domain, 'google.com.tw')!==false && preg_match('/q=([^&]*)/i',$path,$regs)){
$searchengine = 'GOOGLE TAIWAN';
$keywords = urldecode($regs[1]); // google taiwan
}
if(strpos($domain,'google.cn')!==false && preg_match('/q=([^&]*)/i',$path,$regs)){
$searchengine = 'GOOGLE CHINA';
$keywords = urldecode($regs[1]); // google china
}
if(strpos($domain,'google.com')!==false && preg_match('/q= ([^&]*)/i',$path,$regs)){
$searchengine = 'GOOGLE';
$keywords = urldecode($regs[1]); // google
}elseif(strpos($ domain,'baidu.')!==false && preg_match('/wd=([^&]*)/i',$path,$regs)){
$searchengine = 'BAIDU';
$keywords = urldecode ($regs[1]); // baidu
}elseif(strpos($domain,'baidu.')!==false && preg_match('/word=([^&]*)/i',$path, $regs)){
$searchengine = 'BAIDU';
$keywords = urldecode($regs[1]); // baidu
}elseif(strpos($domain,'114.vnet.cn')!== false && preg_match('/kw=([^&]*)/i',$path,$regs)){
$searchengine = 'CT114';
$keywords = urldecode($regs[1]); // ct114
}elseif(strpos($domain,'iask.com')!==false && preg_match('/k=([^&]*)/i',$path,$regs)){
$searchengine = ' IASK';
$keywords = urldecode($regs[1]); // iask
}elseif(strpos($domain,'soso.com')!==false && preg_match('/w=([^&] *)/i',$path,$regs)){
$searchengine = 'SOSO';
$keywords = urldecode($regs[1]); // soso
}elseif(strpos($domain, 'sogou. com')!==false && preg_match('/query=([^&]*)/i',$path,$regs)){
$searchengine = 'SOGOU';
$keywords = urldecode($regs[ 1]); // sogou
}elseif(strpos($domain,'so.163.com')!==false && preg_match('/q=([^&]*)/i',$path,$ regs)){
$searchengine = 'NETEASE';
$keywords = urldecode($regs[1]); // netease
}elseif(strpos($domain,'yodao.com')!== false && preg_match( '/q=([^&]*)/i',$path,$regs)){
$searchengine = 'YODAO';
$keywords = urldecode($regs[1]); // yodao
}elseif (strpos($domain,'zhongsou.com')!==false && preg_match('/word=([^&]*)/i',$path,$regs)){
$searchengine = 'ZHONGSOU';
$keywords = urldecode($regs[1]); // zhongsou
}elseif(strpos($domain,'search.tom.com')!==false && preg_match('/w=([^&]* )/i',$path,$regs)){
$searchengine = 'TOM';
$keywords = urldecode($regs[1]); // tom
}elseif(strpos($domain,'live.com ')!==false && preg_match('/q=([^&]*)/i',$path,$regs)){
$searchengine = 'MSLIVE';
$keywords = urldecode($regs[1 ]); // MSLIVE
}elseif(strpos($domain, 'tw.search.yahoo.com')!==false && preg_match('/p=([^&]*)/i',$path, $regs)){
$searchengine = 'YAHOO TAIWAN';
$keywords = urldecode($regs[1]); // yahoo taiwan
}elseif(strpos($domain,'cn.yahoo.')!== false && preg_match('/p=([^&]*)/i',$path,$regs)){
$searchengine = 'YAHOO CHINA';
$keywords = urldecode($regs[1]); / / yahoo china
}elseif(strpos($domain,'yahoo.')!==false && preg_match('/p=([^&]*)/i',$path,$regs)){
$searchengine = 'YAHOO';
$keywords = urldecode($regs[1]); // yahoo
}elseif(strpos($domain,'msn.com.tw')!==false && preg_match('/q=( [^&]*)/i',$path,$regs)){
$searchengine = 'MSN TAIWAN';
$keywords = urldecode($regs[1]); // msn taiwan
}elseif(strpos( $domain,'msn.com.cn')!==false && preg_match('/q=([^&]*)/i',$path,$regs)){
$searchengine = 'MSN CHINA';
$keywords = urldecode($regs[1]); // msn china
}elseif(strpos($domain,'msn.com')!==false && preg_match('/q=([^&]*) /i',$path,$regs)){
$searchengine = 'MSN';
$keywords = urldecode($regs[1]); // msn
}
return $keywords;
}
?>