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php無限級(jí)分類實(shí)現(xiàn)評(píng)論及回復(fù)功能

經(jīng)常在各大論壇或新聞板塊詳情頁面下邊看到評(píng)論功能，當(dāng)然不單單是直接發(fā)表評(píng)論內(nèi)容那么簡(jiǎn)單，可以對(duì)別人的評(píng)論進(jìn)行回復(fù)，別人又可以對(duì)你的回復(fù)再次評(píng)論或回復(fù)，如此反復(fù)，理論上可以說是沒有休止，從技術(shù)角度分析很容易想到運(yùn)用無限級(jí)分類技術(shù)存儲(chǔ)數(shù)據(jù)，運(yùn)用遞歸獲取評(píng)論層級(jí)結(jié)構(gòu)數(shù)據(jù)，運(yùn)用ajax實(shí)現(xiàn)評(píng)論頁面交互，這里用thinkphp框架做個(gè)簡(jiǎn)單的demo練練手，為了簡(jiǎn)化流程這里第三級(jí)評(píng)論開始停止回復(fù)，當(dāng)然只要在這個(gè)基礎(chǔ)上稍作修改就可以實(shí)現(xiàn)無限回復(fù)功能，主要是view層樣式修改較麻煩，需花些時(shí)間。

一、效果需求分析:

1.在頭部可以直接發(fā)布一級(jí)評(píng)論,最新發(fā)表的評(píng)論顯示在最上面,如下效果圖

2.對(duì)發(fā)表的評(píng)論可以回復(fù)，回復(fù)顯示在上級(jí)評(píng)論下邊，形成層級(jí)關(guān)系，如下效果圖

3.頁面操作細(xì)節(jié):點(diǎn)擊某個(gè)評(píng)論的回復(fù)按鈕時(shí)，顯示回復(fù)文本輸入框，同時(shí)其他評(píng)論的回復(fù)文本輸入框消失，當(dāng)再次點(diǎn)擊該回復(fù)按鈕時(shí)，該文本框消失

4.在最后一級(jí)評(píng)論(這里設(shè)置是第三級(jí))關(guān)閉回復(fù)功能

5.即時(shí)顯示評(píng)論總數(shù)

二、實(shí)現(xiàn)思路及細(xì)節(jié)

1.數(shù)據(jù)表設(shè)計(jì)

2.controller層關(guān)鍵函數(shù):

(1). 遞歸獲取評(píng)論列表

/**
*遞歸獲取評(píng)論列表
 */
 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;
 }

(2). 展示評(píng)論頁面的action

public function index(){ 
 $num = M('comment')->count(); //獲取評(píng)論總數(shù)
 $this->assign('num',$num);
 $data=array();
 $data=$this->getCommlist();//獲取評(píng)論列表
 $this->assign("commlist",$data);
 $this->display('index');
 }

(3).評(píng)論頁面ajax訪問添加評(píng)論的action

/**
*添加評(píng)論
 */
 public function addComment(){  
 $data=array();
 if((isset($_POST["comment"]))(!empty($_POST["comment"]))){
 $cm = json_decode($_POST["comment"],true);//通過第二個(gè)參數(shù)true，將json字符串轉(zhuǎn)化為鍵值對(duì)數(shù)組
 $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();//統(tǒng)計(jì)評(píng)論總數(shù)
 $data['num']= $num;

 }else{
 $data["error"] = "0";
 }


 echo json_encode($data);
 }

3.view層實(shí)現(xiàn)

(1). 展示頁面的整體結(jié)構(gòu)設(shè)計(jì)

實(shí)際效果:

頁面html代碼:

!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無限級(jí)分類實(shí)戰(zhàn)————評(píng)論及回復(fù)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">
 !--發(fā)表評(píng)論區(qū)begin-->
 div>
 div class="comment-num">
 span>{$num}條評(píng)論/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" rel="external nofollow" >span style=''>發(fā)表評(píng)論/span>/a>
 /div> 
 /div>
 /div>
 !--發(fā)表評(píng)論區(qū)end-->

 !--評(píng)論列表顯示區(qū)begin-->
 !-- {$commentlist} -->
 div class="comment-filed-list" >
 div>span>全部評(píng)論/span>/div>
 div class="comment-list" >
  !--一級(jí)評(píng)論列表begin-->
  ul class="comment-ul"> 
  volist name="commlist" id="data">   
   li comment_id="{$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" rel="external nofollow" >回復(fù)/a>   
    /div> 
   /div>        
   /div>

   !--二級(jí)評(píng)論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" rel="external nofollow" >回復(fù)/a>
     /div> 
    /div>        
    /div>

    !--三級(jí)評(píng)論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" rel="external nofollow" >回復(fù)/a> -->
      /div> 
     /div>        
     /div>
    /li>
    /volist>
    /ul> 
    !--三級(jí)評(píng)論end-->

   /li>
   /volist>
   /ul> 
   !--二級(jí)評(píng)論end-->

  /li>
  /volist>         
  /ul>
  !--一級(jí)評(píng)論列表end-->
 /div> 
 /div>
 !--評(píng)論列表顯示區(qū)end-->
/div> 
/body>
/html>

(2). 單個(gè)評(píng)論信息div結(jié)構(gòu)代碼

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" rel="external nofollow" >回復(fù)/a>   
 /div> 
 /div>        
/div>

對(duì)應(yīng)的效果圖:

對(duì)應(yīng)的css代碼:

.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;
}

4. JS代碼

(1). 提交評(píng)論:提交評(píng)論的a標(biāo)簽按鈕引用了樣式comment-submit，在其點(diǎn)擊事件中進(jìn)行ajax操作

$('body').delegate('.comment-submit','click',function(){ 
 var content = $.trim($(this).parent().prev().children("textarea").val());//根據(jù)布局結(jié)構(gòu)獲取當(dāng)前評(píng)論內(nèi)容
 $(this).parent().prev().children("textarea").val("");//獲取完內(nèi)容后清空輸入框
 if(""==content){
  alert("評(píng)論內(nèi)容不能為空!"); 
 }else{
  var cmdata = new Object();
  cmdata.parent_id = $(this).attr("parent_id");//上級(jí)評(píng)論id
  cmdata.content = content;
  cmdata.nickname = "游客";//測(cè)試用數(shù)據(jù)
  cmdata.head_pic = "/Public/images/default.jpg";//測(cè)試用數(shù)據(jù)  
  var replyswitch = $(this).attr("replyswitch");//獲取回復(fù)開關(guān)鎖屬性
  $.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();//刪除已存在的所有回復(fù)div 
   //更新評(píng)論總數(shù)   
   $(".comment-num").children("span").html(data.num+"條評(píng)論");
   //顯示新增評(píng)論
   var newli = "";   
   if(cmdata.parent_id == "0"){
    //發(fā)表的是一級(jí)評(píng)論時(shí)，添加到一級(jí)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);'>回復(fù)/a>/div>/div>/div>ul class='children'>/ul>/li>";    
    $(".comment-ul").prepend(newli);
   }else{
    //否則添加到對(duì)應(yīng)的孩子ul列表中    
    if('off'==replyswitch){//檢驗(yàn)出回復(fù)關(guān)閉鎖存在，即三級(jí)評(píng)論不再提供回復(fù)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{//二級(jí)評(píng)論的回復(fù)按鈕要添加回復(fù)關(guān)閉鎖屬性   
    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' >回復(fù)/a>/div>/div>/div>ul class='children'>/ul>/li>";
    }    
    $("li[comment_id='"+data.parent_id+"']").children("ul").prepend(newli);
   }

   }else{
   //有錯(cuò)誤信息
   alert(data.error);
   }

  }
  });
 }


 });

(2).回復(fù)評(píng)論:回復(fù)評(píng)論的a標(biāo)簽按鈕引用了樣式comment-reply，在其點(diǎn)擊事件中進(jìn)行顯示或隱藏評(píng)論輸入框的操作

//點(diǎn)擊"回復(fù)"按鈕顯示或隱藏回復(fù)輸入框
 $("body").delegate(".comment-reply","click",function(){
 if($(this).next().length>0){//判斷出回復(fù)div已經(jīng)存在,去除掉
  $(this).next().remove();
  }else{//添加回復(fù)div
  $(".comment-reply").next().remove();//刪除已存在的所有回復(fù)div 
  //添加當(dāng)前回復(fù)div
  var parent_id = $(this).attr("comment_id");//要回復(fù)的評(píng)論id

  var divhtml = "";
  if('off'==$(this).attr("replyswitch")){//二級(jí)評(píng)論回復(fù)后三級(jí)評(píng)論不再提供回復(fù)功能,將關(guān)閉屬性附加到"提交回復(fù)"按鈕"
  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' >提交回復(fù)/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);'>提交回復(fù)/a>/div>/div>";
  }  
  $(this).after(divhtml);
  }
 });

三、完整代碼免費(fèi)下載

php無限級(jí)分類實(shí)現(xiàn)評(píng)論及回復(fù)

以上就是本文的全部內(nèi)容，希望對(duì)大家的學(xué)習(xí)有所幫助，也希望大家多多支持腳本之家。

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