此段函数实现了无插件点赞功能，实现原理大体是通过自定义字段保存赞数量，通过 Cookie 记录并禁止重复赞。具体的代码如下：
- //AJAX点赞
- function dotGood()
- {
- global $wpdb, $post;
- $id = $_POST["um_id"];
- if ($_POST["um_action"] == 'topTop') {
- $specs_raters = get_post_meta($id, 'dotGood', true);
- $expire = time() + 99999999;
- $domain = ($_SERVER['HTTP_HOST'] != 'localhost') ? $_SERVER['HTTP_HOST'] : false; // make cookies work with localhost
- setcookie('dotGood_' . $id, $id, $expire, '/', $domain, false);
- if (!$specs_raters || !is_numeric($specs_raters)) update_post_meta($id, 'dotGood', 1);
- else update_post_meta($id, 'dotGood', ($specs_raters + 1));
- echo get_post_meta($id, 'dotGood', true);
- }
- die;
- }
- add_action('wp_ajax_nopriv_dotGood', 'dotGood');
- add_action('wp_ajax_dotGood', 'dotGood');
js 部分：
- //点赞
- $.fn.postLike = function () {
- if ($(this).hasClass('done')) {
- alert('点多了伤身体~');
- return false;
- } else {
- $(this).addClass('done');
- var id = $(this).data("id"),
- action = $(this).data('action'),
- rateHolder = $(this).children('.count');
- var ajax_data = {
- action: "dotGood",
- um_id: id,
- um_action: action
- };
- $.post("/wp-admin/admin-ajax.php", ajax_data,
- function (data) {
- $(rateHolder).HTML(data);
- });
- return false;
- }
- };
- $(".dotGood").click(function () {
- $(this).postLike();
- });
代码引用部分：
- <a href="javascript:;" data-action="topTop" data-id="<?php the_ID(); ?>" class="dotGood <?php echo isset($_COOKIE['dotGood_' . $post->ID]) ? 'done' : ''; ?>">
- <span class="count"><?php echo ($dot_good=get_post_meta($post->ID, 'dotGood', true)) ? $dot_good : '0'; ?></span>
- </a>
对于代码引用部分，还可以加点 CSS：
- .post-like{margin:10% 0 0;position:relative;}
- .post-like a.dotGood{height:30px;line-height:30px;width:30px;font-size:24px;text-align:center;display:inline-block;cursor: pointer;position:relative;}
- .post-like a.dotGood.done{color: #e2264d;}
- .post-like a.dotGood span{position:absolute;display:inline-block;top:0;left:26px;width:auto;font-size:14px;}
- .post-like a.dotGood span:before{content:'+';}
