PHP keyword Retrieval

Keyword retrieval in PHP

I found a piece of code on the Internet to get the search token. I tested whether the code is invalid or there is a BUG?

// Retrieve the search source Guan jianzi

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 the 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 matching information 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"];

// Retrieve domain names without Parameters

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

$ Burl = $ matches [1];

// Match 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); // 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 sousearch

$ 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 = "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); // The engine is gbk

$ Urlname = "Bing :";

$ _ SESSION ["urlname"] = $ urlname;

$ _ SESSION ["s_s_keyword"] = $ s_s_keyword;

}

Else if ($ so)

{// From 360

$ 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 = "360 :";

$ _ 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;

$ 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 --------------------

Are there any error messages?

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

Your code is N years ago.

$ _ SERVER ['HTTP _ referer'] cannot obtain https: // websites.

For the sake of security, almost all search engines Use https: // instead of http ://.