PHP Get search keywords related issues

PHP Gets the search keyword problem

On the internet to find a piece of code to achieve search keyword, testing a key word can not be, is this code is invalid, or there is a bug?

Search Source keyword

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.hk"; 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

$search _8= "so.com"; q= UTF8

$google =preg_match ("/b{$search _1}b/", $url)//record match 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);

$so =preg_match ("/b{$search _8}b/", $url);

$s _s_keyword= "";

$bul =$_server[' Http_referer '];

$bul =$_request["Comelink"];

Get the domain name without parameters

Preg_match (' @^: http://)? ( [^/]+) @i ', $bul, $matches);

$burl = $matches [1];

Matching domain name settings

$curl = "www.hcyf07.com";

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);/engine for 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);/engine for 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);/engine for 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);/engine for GBK

$urlname = "Sogou:";

$_session["urlname"]= $urlname;

$_session["S_s_keyword"]= $s _s_keyword;

}

else if ($soso)

{//From Search

$s _s_keyword=get_keyword ($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);/engine for GBK

$urlname = "Search:";

$_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);/engine for GBK

$urlname = "Bing:";

$_session["urlname"]= $urlname;

$_session["S_s_keyword"]= $s _s_keyword;

}

else if ($SO)

$s _s_keyword=get_keyword ($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);/engine for GBK

$_session["urlname"]= $urlname;

$_session["S_s_keyword"]= $s _s_keyword;

}

else if ($youdao)

{//Come 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);/engine for GBK

$urlname = "Youdao:";

$_session["urlname"]= $urlname;

$_session["S_s_keyword"]= $s _s_keyword;

}

else{

$urlname = $burl;

$urlname = "Direct access";

$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"];

}

------Solution--------------------

Do you have any false hints?

------Solution--------------------

You so code is n years ago.

$_server[' Http_referer ' cannot get a https://Web site.

Now for security reasons, almost all search engines use https://rather than http://.