本文实例讲述了thinkPHP实现基于ajax的评论回复功能。分享给大家供大家参考，具体如下：
控制器代码:
<?php
namespace Home\Controller;
use Think\Controller;
class IndexController extends Controller {
public function index(){
$num = M('comment')->count(); //获取评论总数
$this->assign('num',$num);
$data=array();
$data=$this->getCommlist();//获取评论列表
$this->assign("commlist",$data);
$this->display('index');
}
/**
*添加评论
*/
public function addComment(){
$data=array();
if((isset($_POST["comment"]))&&(!empty($_POST["comment"]))){
$cm = json_decode($_POST["comment"],true);//通过第二个参数true，将json字符串转化为键值对数组
$cm['create_time']=date('Y-m-d H:i:s',time());
$newcm = M('comment');
$id = $newcm->add($cm);
$cm["id"] = $id;
$data = $cm;
$num = M('comment')->count();//统计评论总数
$data['num']= $num;
}else{
$data["error"] = "0";
}
echo json_encode($data);
}
/**
*递归获取评论列表
*/
protected function getCommlist($parent_id = 0,&$result = array()){
$arr = M('comment')->where("parent_id = '".$parent_id."'")->order("create_time desc")->select();
if(empty($arr)){
return array();
}
foreach ($arr as $cm) {
$thisArr=&$result[];
$cm["children"] = $this->getCommlist($cm["id"],$thisArr);
$thisArr = $cm;
}
return $result;
}
}
JavaScript代码:
$(function(){
//点击提交评论内容
$('body').delegate('.comment-submit','click',function(){
var content = $.trim($(this).parent().prev().children("textarea").val());//根据布局结构获取当前评论内容
$(this).parent().prev().children("textarea").val("");//获取完内容后清空输入框
if(""==content){
alert("评论内容不能为空!");
}else{
var cmdata = new Object();
cmdata.parent_id = $(this).attr("parent_id");//上级评论id
cmdata.content = content;
cmdata.nickname = "游客";//测试用数据
cmdata.head_pic = "/Public/images/default.jpg";//测试用数据
var replyswitch = $(this).attr("replyswitch");//获取回复开关锁属性
$.ajax({
type:"POST",
url:"/index.php/home/index/addComment",
data:{
comment:JSON.stringify(cmdata)
},
dataType:"json",
success:function(data){
if(typeof(data.error)=="undefined"){
$(".comment-reply").next().remove();//删除已存在的所有回复div
//更新评论总数
$(".comment-num").children("span").html(data.num "条评论");
//显示新增评论
var newli = "";
if(cmdata.parent_id == "0"){
//发表的是一级评论时，添加到一级ul列表中
newli = "<li comment_id='" data.id "'><div ><div><img class='head-pic' src='" data.head_pic "' alt=''></div><div class='cm'><div class='cm-header'><span>" data.nickname "</span><span>" data.create_time "</span></div><div class='cm-content'><p>" data.content "</p></div><div class='cm-footer'><a class='comment-reply' comment_id='" data.id "' href='javascript:void(0);'>回复</a></div></div></div><ul class='children'></ul></li>";
$(".comment-ul").prepend(newli);
}else{
//否则添加到对应的孩子ul列表中
if('off'==replyswitch){//检验出回复关闭锁存在，即三级评论不再提供回复功能
newli = "<li comment_id='" data.id "'><div ><div><img class='head-pic' src='" data.head_pic "' alt=''></div><div class='children-cm'><div class='cm-header'><span>" data.nickname "</span><span>" data.create_time "</span></div><div class='cm-content'><p>" data.content "</p></div><div class='cm-footer'></div></div></div><ul class='children'></ul></li>";
}else{//二级评论的回复按钮要添加回复关闭锁属性
newli = "<li comment_id='" data.id "'><div ><div><img class='head-pic' src='" data.head_pic "' alt=''></div><div class='children-cm'><div class='cm-header'><span>" data.nickname "</span><span>" data.create_time "</span></div><div class='cm-content'><p>" data.content "</p></div><div class='cm-footer'><a class='comment-reply' comment_id='" data.id "' href='javascript:void(0);' replyswitch='off' >回复</a></div></div></div><ul class='children'></ul></li>";
}
$("li[comment_id='" data.parent_id "']").children("ul").prepend(newli);
}
}else{
//有错误信息
alert(data.error);
}
}
});
}
});
//点击"回复"按钮显示或隐藏回复输入框
$("body").delegate(".comment-reply","click",function(){
if($(this).next().length>0){//判断出回复div已经存在,去除掉
$(this).next().remove();
}else{//添加回复div
$(".comment-reply").next().remove();//删除已存在的所有回复div
//添加当前回复div
var parent_id = $(this).attr("comment_id");//要回复的评论id
var divhtml = "";
if('off'==$(this).attr("replyswitch")){//二级评论回复后三级评论不再提供回复功能,将关闭属性附加到"提交回复"按钮"
divhtml = "<div class='div-reply-txt' style='width:98%;padding:3px;' replyid='2'><div><textarea class='txt-reply' replyid='2' style='width: 100%; height: 60px;'></textarea></div><div style='margin-top:5px;text-align:right;'><a class='comment-submit' parent_id='" parent_id "' style='font-size:14px;text-decoration:none;background-color:#63B8FF;' href='javascript:void(0);' replyswitch='off' >提交回复</a></div></div>";
}else{
divhtml = "<div class='div-reply-txt' style='width:98%;padding:3px;' replyid='2'><div><textarea class='txt-reply' replyid='2' style='width: 100%; height: 60px;'></textarea></div><div style='margin-top:5px;text-align:right;'><a class='comment-submit' parent_id='" parent_id "' style='font-size:14px;text-decoration:none;background-color:#63B8FF;' href='javascript:void(0);'>提交回复</a></div></div>";
}
$(this).after(divhtml);
}
});
})
页面样式代码:
.comment-filed{
width:640px;
margin:0 auto;
}
.comment-num{
text-align: right;
font-size:14px;
}
.div-txt-submit{
text-align:right;
margin-top:8px;
}
.comment-submit{
background-color:#63B8FF;
margin-top:15px;
text-decoration:none;
color:#fff;
padding:5px;
font-size:14px;
}
.txt-commit{
border:1px solid blue;
width:620px;
height: 60px;
padding: 10px;
}
.txt-reply{
width: 100%;
height: 60px;
}
.comment-filed-list{
margin-top:20px;
}
.comment-list{
margin-top:2px;
width:herit;
height:50px;
border-top:1px solid gray;
}
.comment-ul{
list-style:none;
padding-left:0;
}
.head-pic{
width:40px;
height:40px;
}
.cm{
position:relative;
top:0px;
left:40px;
top:-40px;
width:600px;
}
.cm-header{
padding-left:5px;
}
.cm-content{
padding-left:5px;
}
.cm-footer{
padding-bottom:15px;
text-align:right;
border-bottom: 1px dotted #CCC;
}
.comment-reply{
text-decoration:none;
color:gray;
font-size: 14px;
}
.children{
list-style:none;
background-color:#FAFAFA;
padding-left:0;
margin-left:40px;
}
.children-cm{
position:relative;
left:40px;
top:-40px;
width:90%;
}
页面布局代码:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html lang="en">
<head>
<meta http-equiv="Content-Type" content="text/html;charset=UTF-8">
<title>php评论及回复功能</title>
<link rel="stylesheet" type="text/css" href="/Public/css/comment.css" rel="external nofollow" >
<script type="text/javascript" src="/Public/js/jquery-1.11.3.min.js" ></script>
<script type="text/javascript" src="/Public/js/comment.js" ></script>
</head>
<body>
<div class="comment-filed">
<!--发表评论区begin-->
<div>
<div class="comment-num">
<span>{$num}条评论</span>
</div>
<div>
<div>
<textarea class="txt-commit" replyid="0"></textarea>
</div>
<div class="div-txt-submit">
<a class="comment-submit" parent_id="0" style="" href="javascript:void(0);" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" ><span style=''>发表评论</span></a>
</div>
</div>
</div>
<!--发表评论区end-->
<!--评论列表显示区begin-->
<!-- {$commentlist} -->
<div class="comment-filed-list" >
<div><span>全部评论</span></div>
<div class="comment-list" >
<!--一级评论列表begin-->
<ul class="comment-ul">
<volist name="commlist" id="data">
<li comment_id="{$data.id}">
<div >
<div>
<img class="head-pic" src="{$data.head_pic}" alt="">
</div>
<div class="cm">
<div class="cm-header">
<span>{$data.nickname}</span>
<span>{$data.create_time}</span>
</div>
<div class="cm-content">
<p>
{$data.content}
</p>
</div>
<div class="cm-footer">
<a class="comment-reply" comment_id="{$data.id}" href="javascript:void(0);" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >回复</a>
</div>
</div>
</div>
<!--二级评论begin-->
<ul class="children">
<volist name="data.children" id="child" >
<li comment_id="{$child.id}">
<div >
<div>
<img class="head-pic" src="{$child.head_pic}" alt="">
</div>
<div class="children-cm">
<div class="cm-header">
<span>{$child.nickname}</span>
<span>{$child.create_time}</span>
</div>
<div class="cm-content">
<p>
{$child.content}
</p>
</div>
<div class="cm-footer">
<a class="comment-reply" replyswitch="off" comment_id="{$child.id}" href="javascript:void(0);" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >回复</a>
</div>
</div>
</div>
<!--三级评论begin-->
<ul class="children">
<volist name="child.children" id="grandson" >
<li comment_id="{$grandson.id}">
<div >
<div>
<img class="head-pic" src="{$grandson.head_pic}" alt="">
</div>
<div class="children-cm">
<div class="cm-header">
<span>{$grandson.nickname}</span>
<span>{$grandson.create_time}</span>
</div>
<div class="cm-content">
<p>
{$grandson.content}
</p>
</div>
<div class="cm-footer">
<!-- <a class="comment-reply" comment_id="1" href="javascript:void(0);" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >回复</a> -->
</div>
</div>
</div>
</li>
</volist>
</ul>
<!--三级评论end-->
</li>
</volist>
</ul>
<!--二级评论end-->
</li>
</volist>
</ul>
<!--一级评论列表end-->
</div>
</div>
<!--评论列表显示区end-->
</div>
</body>
</html>
sql语句:
DROP TABLE IF EXISTS `t_comment`; CREATE TABLE `t_comment` ( `id` int(11) NOT NULL AUTO_INCREMENT COMMENT '主键id', `parent_id` int(11) NOT NULL COMMENT '上级评论id,若是一级评论则为0', `nickname` varchar(100) DEFAULT NULL COMMENT '评论人昵称', `head_pic` varchar(400) DEFAULT NULL COMMENT '评论人头像', `content` text COMMENT '评论内容', `create_time` datetime DEFAULT NULL COMMENT '评论或回复发表时间', PRIMARY KEY (`id`) ) ENGINE=MyISAM AUTO_INCREMENT=148 DEFAULT CHARSET=utf8;
页面布局少一个jquery.js请自行加上。
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