WordPress中留言墙的实现

如何应用到主题

分享一下，在网上看到的比较有意思的博客美化点，>> 留言墙 <<，将来访者按照评论数量为依据排序排版输出在页面上（重点是css样式真的很nice）

下面就是我博客的 留言墙（传送门，click here!）

以下就是实现代码，源代码是在无主题的博客看到的，据说原作者是折子戏，在此先感谢各位大大慷慨分享了

<?php
    $query="SELECT COUNT(comment_ID) AS cnt, comment_author, comment_author_url, comment_author_email FROM (SELECT * FROM $wpdb->comments LEFT OUTER JOIN $wpdb->posts ON ($wpdb->posts.ID=$wpdb->comments.comment_post_ID) WHERE comment_date > date_sub( NOW(), INTERVAL 24 MONTH ) AND user_id='0' AND post_password='' AND comment_approved='1' AND comment_type='' ORDER BY comment_date DESC) AS tempcmt GROUP BY comment_author_email ORDER BY cnt DESC LIMIT 21";
    //DESC LiMIT就是输出的评论者个数，可酌情修改
    $wall = $wpdb->get_results($query);
    foreach ($wall as $comment){
        if( $comment->comment_author_url ) 
            $url = $comment->comment_author_url;
        else $url="#";
        $avatar = get_avatar( $comment->comment_author_email, $size = '36' );
        $tmp = "<li><a target=\"_blank\" href=\"".$comment->comment_author_url."\" rel=\"nofollow\">".$avatar."<em>".$comment->comment_author."</em> <strong>".$comment->cnt."条</strong><address>".$comment->comment_author_url."</address></a></li>";
        $output .= $tmp;
    }
    $output = "<ul class=\"readers-list\">".$output."</ul>";
    echo $output ;
?>

<?php

$query="SELECT COUNT(comment_ID) AS cnt, comment_author, comment_author_url, comment_author_email FROM (SELECT * FROM $wpdb->comments LEFT OUTER JOIN $wpdb->posts ON ($wpdb->posts.ID=$wpdb->comments.comment_post_ID) WHERE comment_date > date_sub( NOW(), INTERVAL 24 MONTH ) AND user_id='0' AND post_password='' AND comment_approved='1' AND comment_type='' ORDER BY comment_date DESC) AS tempcmt GROUP BY comment_author_email ORDER BY cnt DESC LIMIT 21";

//DESC LiMIT就是输出的评论者个数，可酌情修改

$wall = $wpdb->get_results($query);

foreach ($wall as $comment){

if( $comment->comment_author_url )

$url = $comment->comment_author_url;

else $url="#";

$avatar = get_avatar( $comment->comment_author_email, $size = '36' );

$tmp = "<li><a target=\"_blank\" href=\"".$comment->comment_author_url."\" rel=\"nofollow\">".$avatar."<em>".$comment->comment_author."</em> <strong>".$comment->cnt."条</strong><address>".$comment->comment_author_url."</address></a></li>";

$output .= $tmp;

}

$output = "<ul class=\"readers-list\">".$output."</ul>";

echo $output ;

代码的主要思路就是查询数据库 一定时间段的评论，并统计到每个人头上，最后按照评论者分组排序，这个学过sql语句的都应该知道，不会的也可以百度sql语句，如何设置一个时间区间（比如一年，一个月）然后替换上面查询语句的 date_sub( NOW(), INTERVAL 24 MONTH )部分，统计不同时间区间,就可以实现，年度排行榜，月排行榜神马的

当然这样输肯定不行，随话说人靠衣装马靠鞍，给这个输出套上一个css样式也是很有必要的，不得不再说一次，这个css真的很nice

.readers-list{line-height:18px;text-align:left;overflow:hidden;_zoom:1;margin-bottom:20px}
.readers-list li{width:185px;float:left;*margin-right:-1px}
.readers-list a,.readers-list a:hover strong{background-color:#f2f2f2;background-image:-webkit-linear-gradient(#f8f8f8,#f2f2f2);background-image:-moz-linear-gradient(#f8f8f8,#f2f2f2);background-image:linear-gradient(#f8f8f8,#f2f2f2)}
.readers-list a{position:relative;display:block;height:36px;margin:7px;padding:4px 4px 4px 44px;color:#999;overflow:hidden;border:#ccc 1px solid;border-radius:2px;box-shadow:#eee 0 0 2px}
.readers-list img,.readers-list em,.readers-list strong{-webkit-transition:all .2s ease-out;-moz-transition:all .2s ease-out;transition:all .2s ease-out}
.readers-list img{width:36px;height:36px;float:left;margin:0 8px 0 -40px;border-radius:2px}
.readers-list em{color:#666;font-style:normal;margin-right:10px}
.readers-list strong{color:#ddd;width:50px;text-align:right;position:absolute;right:6px;top:4px;font:bold 14px/16px microsoft yahei}
.readers-list address{overflow: hidden;whilte-space: nowrap;text-overflow: ellipsis;}
.readers-list a:hover{border-color:#bbb;box-shadow:#ccc 0 0 2px;background-color:#fff;background-image:none}
.readers-list a:hover img{opacity:.6;margin-left:0}
.readers-list a:hover em{color:#EE8B17;font:bold 12px/36px microsoft yahei}
.readers-list a:hover strong{color:#EE8B17;right:137px;top:0;text-align:center;border-right:#ccc 1px solid;height:44px;line-height:40px}

.readers-list{line-height:18px;text-align:left;overflow:hidden;_zoom:1;margin-bottom:20px}

.readers-list li{width:185px;float:left;*margin-right:-1px}

.readers-list a,.readers-list a:hover strong{background-color:#f2f2f2;background-image:-webkit-linear-gradient(#f8f8f8,#f2f2f2);background-image:-moz-linear-gradient(#f8f8f8,#f2f2f2);background-image:linear-gradient(#f8f8f8,#f2f2f2)}

.readers-list a{position:relative;display:block;height:36px;margin:7px;padding:4px 4px 4px 44px;color:#999;overflow:hidden;border:#ccc 1px solid;border-radius:2px;box-shadow:#eee 0 0 2px}

.readers-list img,.readers-list em,.readers-list strong{-webkit-transition:all .2s ease-out;-moz-transition:all .2s ease-out;transition:all .2s ease-out}

.readers-list img{width:36px;height:36px;float:left;margin:0 8px 0 -40px;border-radius:2px}

.readers-list em{color:#666;font-style:normal;margin-right:10px}

.readers-list strong{color:#ddd;width:50px;text-align:right;position:absolute;right:6px;top:4px;font:bold 14px/16px microsoft yahei}

.readers-list address{overflow: hidden;whilte-space: nowrap;text-overflow: ellipsis;}

.readers-list a:hover{border-color:#bbb;box-shadow:#ccc 0 0 2px;background-color:#fff;background-image:none}

.readers-list a:hover img{opacity:.6;margin-left:0}

.readers-list a:hover em{color:#EE8B17;font:bold 12px/36px microsoft yahei}

.readers-list a:hover strong{color:#EE8B17;right:137px;top:0;text-align:center;border-right:#ccc 1px solid;height:44px;line-height:40px}

这儿由于我的博客主题页面比较窄，我就吧标签缩短了一点，可以依博客主题，适度修整

如何应用到主题

代码都有了再来说说怎么用吧，开头的php代码一般放在主题的某个模板页面中，比如留言板（guestbook）,注意不要放在调用评论的代码后面了，css代码放在主题的style.css最后就可以了

最后的代码，就是我修改后放在模板留言板中的代码，实现了文章开头图片的样子，需要的可以参考参考，代码如下

<!--留言墙 2016/7/21.繁夜-->            
<h3>年度评论排行 TOP3</h3>
<?php
    $query="SELECT COUNT(comment_ID) AS cnt, comment_author, comment_author_url, comment_author_email FROM (SELECT * FROM $wpdb->comments LEFT OUTER JOIN $wpdb->posts ON ($wpdb->posts.ID=$wpdb->comments.comment_post_ID) where comment_date between date_sub(now(),interval 1 year) and now() AND user_id='0' AND post_password='' AND comment_approved='1' AND comment_type='' ORDER BY comment_date DESC) AS tempcmt GROUP BY comment_author_email ORDER BY cnt DESC LIMIT 3";
    $wall = $wpdb->get_results($query);
    foreach ($wall as $comment){
        if( $comment->comment_author_url ) 
            $url = $comment->comment_author_url;
        else $url="#";
        $avatar = get_avatar( $comment->comment_author_email, $size = '36' );
        $tmp = "<li><a target=\"_blank\" href=\"".$comment->comment_author_url."\" rel=\"nofollow\">".$avatar."<em>".$comment->comment_author."</em> <strong>".$comment->cnt."条</strong><address>".$comment->comment_author_url."</address></a></li>";
        $output .= $tmp;
    }
    $output = "<ul class=\"readers-list\">".$output."</ul>";
    echo $output ;
?>

<div class="clear"></div><br />
<h3>本月评论排行 TOP6</h3>
<?php
    $query1="SELECT COUNT(comment_ID) AS cnt, comment_author, comment_author_url, comment_author_email FROM (SELECT * FROM $wpdb->comments LEFT OUTER JOIN $wpdb->posts ON ($wpdb->posts.ID=$wpdb->comments.comment_post_ID) where date_format(comment_date,'%Y-%m')=date_format(now(),'%Y-%m') AND user_id='0' AND post_password='' AND comment_approved='1' AND comment_type='' ORDER BY comment_date DESC) AS tempcmt GROUP BY comment_author_email ORDER BY cnt DESC LIMIT 6";
    $wall = $wpdb->get_results($query1);
    foreach ($wall as $comment){
        if( $comment->comment_author_url )
            $url = $comment->comment_author_url;
        else $url="#";
        $avatar = get_avatar( $comment->comment_author_email, $size = '36' );
        $tmp = "<li><a target=\"_blank\" href=\"".$comment->comment_author_url."\" rel=\"nofollow\">".$avatar."<em>".$comment->comment_author."</em> <strong>".$comment->cnt."条</strong><address>".$comment->comment_author_url."</address></a></li>";
        $output1 .= $tmp;
    }
    $output1 = "<ul class=\"readers-list\">".$output1."</ul>";
    echo $output1 ;
?>

<div class="clear"></div><br />
<h3>本周评论排行 TOP9</h3>
<?php
    $query2="SELECT COUNT(comment_ID) AS cnt, comment_author, comment_author_url, comment_author_email FROM (SELECT * FROM $wpdb->comments LEFT OUTER JOIN $wpdb->posts ON ($wpdb->posts.ID=$wpdb->comments.comment_post_ID) where yearweek(date_format(comment_date,'%Y-%m-%d')) = yearweek(now()) AND user_id='0' AND post_password='' AND comment_approved='1' AND comment_type='' ORDER BY comment_date DESC) AS tempcmt GROUP BY comment_author_email ORDER BY cnt DESC LIMIT 9";
    $wall = $wpdb->get_results($query2);
    foreach ($wall as $comment){
        if( $comment->comment_author_url )
            $url = $comment->comment_author_url;
        else $url="#";
        $avatar = get_avatar( $comment->comment_author_email, $size = '36' );
        $tmp = "<li><a target=\"_blank\" href=\"".$comment->comment_author_url."\" rel=\"nofollow\">".$avatar."<em>".$comment->comment_author."</em> <strong>".$comment->cnt."条</strong><address>".$comment->comment_author_url."</address></a></li>";
        $output2 .= $tmp;
    }
    $output2 = "<ul class=\"readers-list\">".$output2."</ul>";
    echo $output2 ;
?>                                        
<div class="clear"></div>
<!--留言墙结束-->

<h3>年度评论排行 TOP3</h3>

<?php

$query="SELECT COUNT(comment_ID) AS cnt, comment_author, comment_author_url, comment_author_email FROM (SELECT * FROM $wpdb->comments LEFT OUTER JOIN $wpdb->posts ON ($wpdb->posts.ID=$wpdb->comments.comment_post_ID) where comment_date between date_sub(now(),interval 1 year) and now() AND user_id='0' AND post_password='' AND comment_approved='1' AND comment_type='' ORDER BY comment_date DESC) AS tempcmt GROUP BY comment_author_email ORDER BY cnt DESC LIMIT 3";

$wall = $wpdb->get_results($query);

foreach ($wall as $comment){

if( $comment->comment_author_url )

$url = $comment->comment_author_url;

else $url="#";

$avatar = get_avatar( $comment->comment_author_email, $size = '36' );

$output .= $tmp;

}

$output = "<ul class=\"readers-list\">".$output."</ul>";

echo $output ;

<h3>本月评论排行 TOP6</h3>

<?php

$query1="SELECT COUNT(comment_ID) AS cnt, comment_author, comment_author_url, comment_author_email FROM (SELECT * FROM $wpdb->comments LEFT OUTER JOIN $wpdb->posts ON ($wpdb->posts.ID=$wpdb->comments.comment_post_ID) where date_format(comment_date,'%Y-%m')=date_format(now(),'%Y-%m') AND user_id='0' AND post_password='' AND comment_approved='1' AND comment_type='' ORDER BY comment_date DESC) AS tempcmt GROUP BY comment_author_email ORDER BY cnt DESC LIMIT 6";

$wall = $wpdb->get_results($query1);

foreach ($wall as $comment){

if( $comment->comment_author_url )

$url = $comment->comment_author_url;

else $url="#";

$avatar = get_avatar( $comment->comment_author_email, $size = '36' );

$output1 .= $tmp;

}

$output1 = "<ul class=\"readers-list\">".$output1."</ul>";

echo $output1 ;

<h3>本周评论排行 TOP9</h3>

<?php

$query2="SELECT COUNT(comment_ID) AS cnt, comment_author, comment_author_url, comment_author_email FROM (SELECT * FROM $wpdb->comments LEFT OUTER JOIN $wpdb->posts ON ($wpdb->posts.ID=$wpdb->comments.comment_post_ID) where yearweek(date_format(comment_date,'%Y-%m-%d')) = yearweek(now()) AND user_id='0' AND post_password='' AND comment_approved='1' AND comment_type='' ORDER BY comment_date DESC) AS tempcmt GROUP BY comment_author_email ORDER BY cnt DESC LIMIT 9";

$wall = $wpdb->get_results($query2);

foreach ($wall as $comment){

if( $comment->comment_author_url )

$url = $comment->comment_author_url;

else $url="#";

$avatar = get_avatar( $comment->comment_author_email, $size = '36' );

$output2 .= $tmp;

}

$output2 = "<ul class=\"readers-list\">".$output2."</ul>";

echo $output2 ;

历史上的今天:

2018: LeetCode: 16. 3Sum Closest(0)
2018: LeetCode: 15. 3Sum(0)

发表评论取消回复

目前评论：3 其中：访客 2 博主 1

拽立网 3 来自「广东省深圳市龙岗区电信」的朋友
回复 2016年12月2日下午8:45 沙发

这个功能好啊，不错啊！你把主题改宽了？厉害！
- 繁夜博主来自「四川省绵阳市联通」的朋友
  回复 2016年12月8日下午7:38 1层
  
  @拽立网当时看着很不错，所以弄过来了，主题变宽主要改改style.css就好了，然后把几张图片P长一点，你也可以试试，lopor感觉还是窄了一点
  - 拽立王 3 来自「广东省深圳市龙岗区电信」的朋友
    回复 2016年12月16日下午3:07 2层
    
    @繁夜能加QQ联系吗？这样才有意思！很多问题想问你！

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