调用访客最近浏览过的文章

WordPress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; ?>