实现原理
通过自定义字段保存赞数量，通过cookies来禁止重复赞。
代码部署
将下面代码添加进function.php
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;
}
将以下代码扔进footer.php文件
<script type="text/JavaScript"> $.fn.postLike = function() { if ($(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() { $(this).postLike(); }); </script>
然后打开你的single.php文件，搜索这段代码<?php the_content(); ?>，在这段代码后面添加以下代码
<div class="post-like">
<a href="javascript：;" data-action="ding" data-id="<?php the_ID(); ?>" class="favorite<?php if(isset($_COOKIE['bigfa_ding_'.$post->ID])) echo ' done';?>">喜欢 <span class="count">
<?php if( get_post_meta($post->ID,'bigfa_ding',true) ){
echo get_post_meta($post->ID,'bigfa_ding',true);
} else {
echo '0';
}?></span>
</a>
</div>
现在是不是就已经好了？？还没有呢，现在的效果还不好看，添加一段代码就好了，将这段代码扔进style.CSS文件，最底部就可以了
.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}
具体效果
