调用访客最近浏览过的文章
调用最近浏览过的文章,比较蛋疼的功能,原理是通过读取浏览器cookie文件,调用显示最近(360天)被访问过的10篇文章 ,需要注意的是,该功能不是统计所有浏览者最近查看过的文章,并没有写进数据库中,每个访客都有自己独有的浏览清单。
将下面代码添加到主题functions.php文件的最后:
- <?php
- /* 可选参数: */
- $zg_cookie_expire = 360; // cookie过期时间,默认值是360天
- $zg_number_of_posts = 10; // 显示篇数,默认值是10。
- $zg_recognize_pages = true;
- /* 此行后不要编辑 */
- function zg_lwp_header() {
- if (is_single()) {
- zg_lw_setcookie();
- } elseif (is_page()) {
- global$zg_recognize_pages;
- if ($zg_recognize_pages === true) {
- zg_lw_setcookie();
- }
- }
- }
- function zg_lw_setcookie() {
- global$wp_query;
- $zg_post_ID = $wp_query->post->ID;
- if (! isset($_COOKIE[“WP-LastViewedPosts”])) {
- $zg_cookiearray = array($zg_post_ID);
- } else {
- $zg_cookiearray = unserialize(preg_replace(‘!s:(\d+):“(.*?)”;!e’, “‘s:’.strlen(‘$2′).’:\”$2\”;'”, stripslashes($_COOKIE[“WP-LastViewedPosts”])));
- if (! is_array($zg_cookiearray)) {
- $zg_cookiearray = array($zg_post_ID);
- }
- }
- if (in_array($zg_post_ID, $zg_cookiearray)) {
- $zg_key = array_search($zg_post_ID, $zg_cookiearray);
- array_splice($zg_cookiearray, $zg_key, 1);
- }
- array_unshift($zg_cookiearray, $zg_post_ID);
- global$zg_number_of_posts;
- while (count($zg_cookiearray) > $zg_number_of_posts) {
- array_pop($zg_cookiearray);
- }
- $zg_blog_url_array = parse_url(get_bloginfo(‘url’));
- $zg_blog_url = $zg_blog_url_array[‘host’];
- $zg_blog_url = str_replace(‘www.’, ”, $zg_blog_url);
- $zg_blog_url_dot = ‘.’;
- $zg_blog_url_dot .= $zg_blog_url;
- $zg_path_url = $zg_blog_url_array[‘path’];
- $zg_path_url_slash = ‘/’;
- $zg_path_url .= $zg_path_url_slash;
- global$zg_cookie_expire;
- setcookie(“WP-LastViewedPosts”, serialize($zg_cookiearray), (time()+($zg_cookie_expire*86400)), $zg_path_url, $zg_blog_url_dot, 0);
- }
- function zg_recently_viewed() {
- echo ‘<ul class=“viewed_posts”>’;
- if (isset($_COOKIE[“WP-LastViewedPosts”])) {
- $zg_post_IDs = unserialize(preg_replace(‘!s:(\d+):“(.*?)”;!e’, “‘s:’.strlen(‘$2′).’:\”$2\”;'”, stripslashes($_COOKIE[“WP-LastViewedPosts”])));
- foreach ($zg_post_IDsas$value) {
- global$wpdb;
- $zg_get_title = $wpdb->get_results(“SELECT post_title FROM $wpdb->posts WHERE ID = ‘$value+0’ LIMIT 1”);
- foreach($zg_get_titleas$zg_title_out) {
- echo“<li><a href=\””. get_permalink($value+0) . “\” title=\””. $zg_title_out->post_title . “\”>”. $zg_title_out->post_title . “</a></li>\n”;
- }
- }
- } else {
- }
- echo ‘</ul>’;
- }
- add_action(‘get_header’,’zg_lwp_header’);
- ?>
由于代码高亮转换后代码可能执行有误,这里提供 源文件下载
调用方法,在侧边sidebar模版或者正文single模版适当位置加入下面代码;
- <?php if (function_exists(‘zg_recently_viewed’)): if (isset($_COOKIE[“WP-LastViewedPosts”])) { ?>
- <h2>Last viewed posts</h2>
- <?php zg_recently_viewed(); ?>
- <?php } endif; ?>
注:调用并不十分准确,有一定误差,效果看本站正文最后。
最后说明一下,代码提取自:Last Viewed Posts 插件,如果嫌折腾麻烦,可以直接安装并启用该插件,使用更为方便,可以直接将该功能拖到侧边小工具中。