thinkPHP实现基于ajax的评论回复功能


            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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