WordPress支持CDN的文章阅读计数

作者: 站长 上传时间: 浏览: N/A 下载: N/A 格式: N/A 评分: N/A

思路:使用Ajax自动提交请求增加文章阅读数,Cookie记录是否已经提交,避免刷新重复提交。

JS代码(保存为views.js):

//获取Cookie
function getCookie(name) {
var str = document.cookie;
var arr = str.split('; ');
for(var i=0; i<arr.length; i++) {
var c = arr[i].split('=');
if(c[0] == name) {
return c[1];
}
}
return false;
}
//Ajax请求
function setPostmeta(varname, postid, target) {
var cookie = getCookie(varname);
if(cookie) return;
jQuery.ajax({
cache: false,
url: ajax_object.ajax_url,
type: 'POST',
data: {
'action': 'add_views',
'post_id': postid,
},
dataType: 'JSON',
async: true,
success:function(result) {
if(result.status == 'success') {
if(target) target.text(result.views);
var exdate = new Date();
exdate.setDate(exdate.getDate() + 360);
document.cookie = varname + '=' + result.views + '; expires=' + exdate.toGMTString() + '; path=/';
}
}
});
}

functions.php中添加如下代码:

//加载JS以及设置Ajax对象
function bzg_load_scripts() {
if(!is_single()) return;
wp_enqueue_script('views', get_theme_file_uri('/js/views.js'), 'jquery');
wp_localize_script('views', 'ajax_object', array(
'ajax_url' => admin_url('admin-ajax.php')
));
}
add_action('wp_enqueue_scripts', 'bzg_load_scripts');

//获取文章阅读数
function bzg_post_views($postid='') {
global $post;
if(!$postid && isset($post->ID)) {
$postid = $post->ID;
}
if(!$postid) return 0;

$views = get_post_meta($postid, 'views', true);
echo $views ? $views : 0;
}

//Ajax添加阅读数
function bzg_set_post_views() {
if(!isset($_POST['post_id'])) return;
$post_id = (int) $_POST['post_id'];
if(get_post_status($post_id) === false) return;

$views = get_post_meta($post_id, 'views', true);
if(!$views) $views = 0;
$views = $views+1;
update_post_meta($post_id, 'views', $views);

wp_send_json(array(
'status' => 'success',
'views' => $views,
));
}
add_action('wp_ajax_add_views', 'bzg_set_post_views');
add_action('wp_ajax_nopriv_add_views', 'bzg_set_post_views');

single.php中调用JS函数:

<script type="text/javascript">
var target = jQuery(".views");
var post_id = <?php echo $id; ?>;
setPostmeta("views_" + post_id, post_id, target);
</script>

target是显示文章阅读数的标签,在需要显示文章阅读数的地方这样调用:

<span class="views">阅读:<?php bzg_post_views(); ?></span>

缺点是最新的阅读数不能实时显示,毕竟CDN缓存了页面,不过计数是正常写入到数据库的。