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(); } else if (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_IDs as $value) { global $wpdb; $zg_get_title = $wpdb->get_results("SELECT post_title FROM $wpdb->posts WHERE ID = '$value+0' LIMIT 1"); foreach($zg_get_title as $zg_title_out) { echo "<li><a href=\"". get_permalink($value+0) . "\" title=\"". $zg_title_out->post_title . "\">". $zg_title_out->post_title . "</a></li>\n"; } } } else { } echo '</ul>'; } add_action('get_header','zg_lwp_header'); ?>
由于代码的拷贝可能使执行有误,这里提供 源文件下载
调用方法,在侧边sidebar模版或者正文single模版适当位置加入下面代码;
<?php if (function_exists('zg_recently_viewed')): if (isset($_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,不过没多大影响。
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。
本文固定连接:https://code.zuifengyun.com/2013/04/47.html,转载须征得作者授权。