WordPress如何添加无刷新AJAX点赞功能

无插件点赞功能由 #Fatesinger# 提供，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：

function.php

/**   * AJAX点赞   * by: #henenseo.com   */ 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');

JavaScript

$.fn.postLike = function () { if ($(this).hasClass('done')) {          alert('点多了伤腰~'); 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(); });

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:'+';}

html

<a href="javascript:;" rel="external nofollow"  data-action="topTop" data-id="<?php the_ID(); ?>"     class="dotGood <?php echo isset($_COOKIE['dotGood_' . $post->ID]) ? 'done' : ''; ?>">      &hearts;      <span class="count"><?php echo ($dot_good=get_post_meta($post->ID, 'dotGood', true)) ? $dot_good : '0'; ?></span> </a>