以下是相关实现代码:
代码如下:
- /*
- Plugin Name: display-search-keywords
- Plugin URI: http://www.imyxiao.com/1531.html
- Description: 当访客通过搜索引擎来到你的博客, 这个插件可以显示访客搜索的关键词
- Version: 1.0
- Author: 仰肖
- */
- function unescape($str) {
- $ret = '';
- $len = strlen($str);
- for ($i = 0; $i < $len; $i++) {
- if ($str[$i] == '%' && $str[$i +1] == 'u') {
- $val = hexdec(substr($str, $i +2, 4));
- if ($val < 0x7f)
- $ret .= chr($val);
- else
- if ($val < 0x800)
- $ret .= chr(0xc0 | ($val >> 6)) . chr(0x80 | ($val & 0x3f));
- else
- $ret .= chr(0xe0 | ($val >> 12)) . chr(0x80 | (($val >> 6) & 0x3f)) . chr(0x80 | ($val & 0x3f));
- $i += 5;
- } else
- if ($str[$i] == '%') {
- $ret .= urldecode(substr($str, $i, 3));
- $i += 2;
- } else
- $ret .= $str[$i];
- }
- return $ret;
- }
- function ls_get_delim($ref) {
- $search_engines = array (
- 'google.com.hk' => 'q',
- 'google.com.tw' => 'q',
- 'go.google.com' => 'q',
- 'google.com' => 'q',
- 'blogsearch.google.com' => 'q',
- 'cn.bing.com' => 'q',
- 'one.cn.yahoo.com' => 'p',
- 'baidu.com' => 'wd',
- 'soso.com' => 'w',
- 'youdao.com' => 'q',
- 'sogou.com' => 'query'
- );
- $delim = false;
- // 判断
- if (isset ($search_engines[$ref])) {
- $delim = $search_engines[$ref];
- }
- return $delim;
- }
- function ls_get_refer() {
- // 判断前一页面的 URL 地址
- $queryString = $_GET['referer'];
- $queryString = unescape($queryString);
- if (!isset ($queryString) || ($queryString == ''))
- return false;
- $referer_info = parse_url($queryString);
- $referer = $referer_info['host'];
- // 去除 www.
- if (substr($referer, 0, 4) == 'www.')
- $referer = substr($referer, 4);
- return $referer;
- }
- function ls_getinfo($what) {
- $referer = ls_get_refer();
- if (!$referer)
- return false;
- $delimiter = ls_get_delim($referer);
- if ($delimiter) {
- $terms = ls_get_terms($delimiter);
- if ($what == 'isref' && $terms != '') {
- return true;
- }
- if ($what == 'terms') {
- echo $terms;
- }
- }
- return false;
- }
- function yxiao_seems_utf8($str) {
- $length = strlen($str);
- for ($i = 0; $i < $length; $i++) {
- $c = ord($str[$i]);
- if ($c < 0x80)
- $n = 0; # 0bbbbbbb
- elseif (($c & 0xE0) == 0xC0) $n = 1; # 110bbbbb
- elseif (($c & 0xF0) == 0xE0) $n = 2; # 1110bbbb
- elseif (($c & 0xF8) == 0xF0) $n = 3; # 11110bbb
- elseif (($c & 0xFC) == 0xF8) $n = 4; # 111110bb
- elseif (($c & 0xFE) == 0xFC) $n = 5; # 1111110b
- else
- return false; # Does not match any model
- for ($j = 0; $j < $n; $j++) { # n bytes matching 10bbbbbb follow ?
- if ((++ $i == $length) || ((ord($str[$i]) & 0xC0) != 0x80))
- return false;
- }
- }
- return true;
- }
- function ls_get_terms($d) {
- // 取得查询值
- $queryString = $_GET['referer'];
- $queryString = unescape($queryString);
- $query_str = parse_url($queryString);
- parse_str($query_str[query], $query_str);
- $query = $query_str[$d];
- $query = urldecode($query);
- $query = str_replace("'",'', $query);
- $query = str_replace('"','', $query);
- $query_array = preg_split('/[\s,\+\.]+/', $query);
- $query_terms = implode(' ', $query_array);
- $terms = htmlspecialchars($query_terms);
- //gbk->utf8
- if (!yxiao_seems_utf8($terms)) {
- $terms = iconv("GBK", "UTF-8//IGNORE", $terms);
- }
- return $terms;
- }
- if (ls_getinfo('isref')) {
- ?>
- document.write('
- ')
- document.write('更多搜索结果: document.write('title="查看的搜索结果" rel="nofollow">')
- document.write('
- ');
来源: https://www.php1.cn/detail/php-2da58c59a4.html