php实现网站留言板功能,php实现留言板
我要实现的就是下图的这种样式,可参考下面这两个网站的留言板,他们的实现原理都是一样的
畅言留言板样式:
网易跟帖样式:
原理
需要在评论表添加两个主要字段 id 和 pid ,其他字段随意添加,比如文章id、回复时间、回复内容、回复人什么的。
其中pid就是当前已经回复过的评论的id。
从上图可以看出,里面每一层的pid就是就是他上一层评论的id。仔细观察下上面的布局。是不是很像PHP中的多维数组?如果你能想到,那么就简单了。
实现方法
1.前台:这个比较简单 就是div嵌div。然后设置div的border和margin padding就行了
<div class="comment"> <div class="comment"> <div class="comment"> </div> </div> </div> <div class="comment"> </div>
2、后台 :用到了两次递归,首先用递归把数据库中的结果重组下,重组之后,然后用递归输出上面的那种前台代码即可
comment表结构和内容如下
然后直接读出这个表中的所有评论。可以得到如下数组
Array ( [0] => Array ( [id] => 1 [pid] => [content] => 评论1 ) [1] => Array ( [id] => 2 [pid] => [content] => 评论2 ) [2] => Array ( [id] => 3 [pid] => [content] => 评论3 ) [3] => Array ( [id] => 4 [pid] => 1 [content] => 评论4回复评论1 ) [4] => Array ( [id] => 5 [pid] => 1 [content] => 评论5回复评论1 ) [5] => Array ( [id] => 6 [pid] => 2 [content] => 评论6回复评论2 ) [6] => Array ( [id] => 7 [pid] => 4 [content] => 评论7回复评论4 ) [7] => Array ( [id] => 8 [pid] => 7 [content] => 评论8回复评论7 ) [8] => Array ( [id] => 9 [pid] => 8 [content] => 评论9回复评论8 ) [9] => Array ( [id] => 10 [pid] => 8 [content] => 评论10回复评论8 ) )
然后我们就需要把这个数组重组成上面的那种留言板形式的
其中$array就是上面读取出来的数组,首先取出pid默认为空的,然后递归,在取出pid为当前评论id的数组
public static function tree($array,$child="child", $pid = null) { $temp = []; foreach ($array as $v) { if ($v['pid'] == $pid) { $v[$child] = self::tree($array,$child,$v['id']); $temp[] = $v; } } return $temp; }
重组后,可以得到下面的这个数组,可以看到,这个数组的样式已经和前台评论样式很像了
Array ( [0] => Array ( [id] => 1 [pid] => [content] => 评论1 [child] => Array ( [0] => Array ( [id] => 4 [pid] => 1 [content] => 评论4回复评论1 [child] => Array ( [0] => Array ( [id] => 7 [pid] => 4 [content] => 评论7回复评论4 [child] => Array ( [0] => Array ( [id] => 8 [pid] => 7 [content] => 评论8回复评论7 [child] => Array ( [0] => Array ( [id] => 9 [pid] => 8 [content] => 评论9回复评论8 [child] => Array ( ) ) [1] => Array ( [id] => 10 [pid] => 8 [content] => 评论10回复评论8 [child] => Array ( ) ) ) ) ) ) ) ) [1] => Array ( [id] => 5 [pid] => 1 [content] => 评论5回复评论1 [child] => Array ( ) ) ) ) [1] => Array ( [id] => 2 [pid] => [content] => 评论2 [child] => Array ( [0] => Array ( [id] => 6 [pid] => 2 [content] => 评论6回复评论2 [child] => Array ( ) ) ) ) [2] => Array ( [id] => 3 [pid] => [content] => 评论3 [child] => Array ( ) ) )
得到上面的数组后 ,再用递归输出即可
public static function traverseArray($array) { foreach ($array as $v) { echo "<div class='comment' style='width: 100%;margin: 10px;background: #EDEFF0;padding: 20px 10px;border: 1px solid #777;'>"; echo $v['content']; if ($v['child']) { self::traverseArray($v['child']); } echo "</div>"; } }
然后即可看到
原理就是这样,就是重组下数组,然后遍历输出就行了。
以上就是php实现畅言留言板和网易跟帖样式的全部过程,大家也可以尝试进行创新,希望这篇文章对大家的学习有所帮助。

Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

AI Hentai Generator
Generate AI Hentai for free.

Hot Article

Hot Tools

DVWA
Damn Vulnerable Web App (DVWA) is a PHP/MySQL web application that is very vulnerable. Its main goals are to be an aid for security professionals to test their skills and tools in a legal environment, to help web developers better understand the process of securing web applications, and to help teachers/students teach/learn in a classroom environment Web application security. The goal of DVWA is to practice some of the most common web vulnerabilities through a simple and straightforward interface, with varying degrees of difficulty. Please note that this software

VSCode Windows 64-bit Download
A free and powerful IDE editor launched by Microsoft

MinGW - Minimalist GNU for Windows
This project is in the process of being migrated to osdn.net/projects/mingw, you can continue to follow us there. MinGW: A native Windows port of the GNU Compiler Collection (GCC), freely distributable import libraries and header files for building native Windows applications; includes extensions to the MSVC runtime to support C99 functionality. All MinGW software can run on 64-bit Windows platforms.

ZendStudio 13.5.1 Mac
Powerful PHP integrated development environment

WebStorm Mac version
Useful JavaScript development tools