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。
更多关于thinkPHP相关内容感兴趣的读者可查看本站专题：《ThinkPHP入门教程》、《thinkPHP模板操作技巧总结》、《ThinkPHP常用方法总结》、《codeigniter入门教程》、《CI(CodeIgniter)框架进阶教程》、《Zend FrameWork框架入门教程》及《PHP模板技术总结》。
希望本文所述对大家基于ThinkPHP框架的PHP程序设计有所帮助。
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