WordPress添加AJAX文章点赞功能

来自Fatesinger，文章赞功能随处可见，例如无觅的相关文章工具、百度分享等等。如果想要给主题专门集成点赞功能，还是得需要下面的代码实现。用自定义字段保存赞数量，通过Cookies来禁止重复赞。

加入至Functions.php文件中：

add_action('wp_ajax_nopriv_bigfa_like', 'bigfa_like');
add_action('wp_ajax_bigfa_like', 'bigfa_like');
function bigfa_like(){
    global $wpdb,$post;
    $id = $_POST["um_id"];
    $action = $_POST["um_action"];
    if ( $action == 'ding'){
    $bigfa_raters = get_post_meta($id,'bigfa_ding',true);
    $expire = time() + 99999999;
    $domain = ($_SERVER['HTTP_HOST'] != 'localhost') ? $_SERVER['HTTP_HOST'] : false; // make cookies work with localhost
    setcookie('bigfa_ding_'.$id,$id,$expire,'/',$domain,false);
    if (!$bigfa_raters || !is_numeric($bigfa_raters)) {
        update_post_meta($id, 'bigfa_ding', 1);
    } 
    else {
            update_post_meta($id, 'bigfa_ding', ($bigfa_raters + 1));
        }

    echo get_post_meta($id,'bigfa_ding',true);

    } 

    die;
}

相对应的JS代码：

$(document).ready(function() { 
$.fn.postLike = function() {
 if ($(this).hasClass('done')) {
 return false;
 } else {
 $(this).addClass('done');
 var id = $(this).data("id"),
 action = $(this).data('action'),
 rateHolder = $(this).children('.count');
 var ajax_data = {
 action: "bigfa_like",
 um_id: id,
 um_action: action
 };
 $.post("/wp-admin/admin-ajax.php", ajax_data,
 function(data) {
 $(rateHolder).html(data);
 });
 return false;
 }
};
$(document).on("click", ".favorite",
function() {
 $(this).postLike();
});
}); 

调用代码：

<div class="post-like">
         <a href="javascript:;" data-action="ding" data-id="" class="favoriteID])) echo ' done';?>">喜欢 <span class="count">
             if( get_post_meta($post->ID,'bigfa_ding',true) ){            
                    echo get_post_meta($post->ID,'bigfa_ding',true);
                 } else {
                    echo '0';
                 }?>span>
        a>
 div>

参考CSS样式

.post-like{text-align:center;padding:10px}
.post-like a{ background-color:#21759B;border-radius: 3px;color: #FFFFFF;font-size: 12px;padding: 5px 10px;text-decoration: none;outline:none}
.post-like a.done, .post-like a:hover{background-color:#eee;color:#21759B;} 
.post-like a.done{cursor:not-allowed}

点击无效问题解决

　　请引用版本为1.10或以上的jQuery。