本文實例講述了thinkPHP實現基于ajax的評論回復功能。分享給大家供大家參考，具體如下：
控制器代碼:
<?phpnamespace Home/Controller;use Think/Controller;class IndexController extends Controller { public function index(){ $num = M('comment')->count(); //獲取評論總數 $this->assign('num',$num); $data=array(); $data=$this->getCommlist();//獲取評論列表 $this->assign("commlist",$data); $this->display('index'); } /** *添加評論 */ public function addComment(){ $data=array(); if((isset($_POST["comment"]))&&(!empty($_POST["comment"]))){ $cm = json_decode($_POST["comment"],true);//通過第二個參數true，將json字符串轉化為鍵值對數組 $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();//統計評論總數 $data['num']= $num; }else{ $data["error"] = "0"; } echo json_encode($data); } /** *遞歸獲取評論列表 */ 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; }}JavaScript代碼:
$(function(){ //點擊提交評論內容 $('body').delegate('.comment-submit','click',function(){ var content = $.trim($(this).parent().prev().children("textarea").val());//根據布局結構獲取當前評論內容 $(this).parent().prev().children("textarea").val("");//獲取完內容后清空輸入框 if(""==content){ alert("評論內容不能為空!"); }else{ var cmdata = new Object(); cmdata.parent_id = $(this).attr("parent_id");//上級評論id cmdata.content = content; cmdata.nickname = "游客";//測試用數據 cmdata.head_pic = "/Public/images/default.jpg";//測試用數據 var replyswitch = $(this).attr("replyswitch");//獲取回復開關鎖屬性 $.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div //更新評論總數 $(".comment-num").children("span").html(data.num+"條評論"); //顯示新增評論 var newli = ""; if(cmdata.parent_id == "0"){ //發表的是一級評論時，添加到一級ul列表中 newli = "<li comment_id='"+data.id+"'><div ><div><img class='head-pic' src='"+data.head_pic+"' $(".comment-ul").prepend(newli); }else{ //否則添加到對應的孩子ul列表中 if('off'==replyswitch){//檢驗出回復關閉鎖存在，即三級評論不再提供回復功能 newli = "<li comment_id='"+data.id+"'><div ><div><img class='head-pic' src='"+data.head_pic+"' }else{//二級評論的回復按鈕要添加回復關閉鎖屬性 newli = "<li comment_id='"+data.id+"'><div ><div><img class='head-pic' src='"+data.head_pic+"' } $("li[comment_id='"+data.parent_id+"']").children("ul").prepend(newli); } }else{ //有錯誤信息 alert(data.error); } } }); } }); //點擊"回復"按鈕顯示或隱藏回復輸入框 $("body").delegate(".comment-reply","click",function(){ if($(this).next().length>0){//判斷出回復div已經存在,去除掉 $(this).next().remove(); }else{//添加回復div $(".comment-reply").next().remove();//刪除已存在的所有回復div //添加當前回復div var parent_id = $(this).attr("comment_id");//要回復的評論id var divhtml = ""; if('off'==$(this).attr("replyswitch")){//二級評論回復后三級評論不再提供回復功能,將關閉屬性附加到"提交回復"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</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</a></div></div>"; } $(this).after(divhtml); } });})頁面樣式代碼:
.comment-filed{ width:640px; margin:0 auto;}.comment-num{ text-align: right; font-size:14px;}.div-txt-submit{ text-align:right; margin-top:8px;}.comment-submit{ background-color:#63B8FF; margin-top:15px; text-decoration:none; color:#fff; padding:5px; font-size:14px;}.txt-commit{ border:1px solid blue; width:620px; height: 60px; padding: 10px;}.txt-reply{ width: 100%; height: 60px;}.comment-filed-list{ margin-top:20px;}.comment-list{ margin-top:2px; width:herit; height:50px; border-top:1px solid gray;}.comment-ul{ list-style:none; padding-left:0;}.head-pic{ width:40px; height:40px;}.cm{ position:relative; top:0px; left:40px; top:-40px; width:600px;}.cm-header{ padding-left:5px;}.cm-content{ padding-left:5px;}.cm-footer{ padding-bottom:15px; text-align:right; border-bottom: 1px dotted #CCC;}.comment-reply{ text-decoration:none; color:gray; font-size: 14px;}.children{ list-style:none; background-color:#FAFAFA; padding-left:0; margin-left:40px;}.children-cm{ position:relative; left:40px; top:-40px; width:90%;}頁面布局代碼:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html lang="en"><head> <meta http-equiv="Content-Type" content="text/html;charset=UTF-8"> <title>php評論及回復功能</title> <link rel="stylesheet" type="text/css" href="/Public/css/comment.css" rel="external nofollow" > <script type="text/javascript" src="/Public/js/jquery-1.11.3.min.js" ></script> <script type="text/javascript" src="/Public/js/comment.js" ></script></head><body><div class="comment-filed"> <!--發表評論區begin--> <div> <div class="comment-num"> <span>{$num}條評論</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" ><span style=''>發表評論</span></a> </div> </div> </div> <!--發表評論區end--> <!--評論列表顯示區begin--> <!-- {$commentlist} --> <div class="comment-filed-list" > <div><span>全部評論</span></div> <div class="comment-list" > <!--一級評論列表begin--> <ul class="comment-ul"> <volist name="commlist" id="data"> <li comment_id="{$data.id}"> <div > <div> <img class="head-pic" src="{$data.head_pic}" </div> <div class="cm"> <div class="cm-header"> <span>{$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="{$data.id}" href="javascript:void(0);" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >回復</a> </div> </div> </div> <!--二級評論begin--> <ul class="children"> <volist name="data.children" id="child" > <li comment_id="{$child.id}"> <div > <div> <img class="head-pic" src="{$child.head_pic}" </div> <div class="children-cm"> <div class="cm-header"> <span>{$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="{$child.id}" href="javascript:void(0);" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >回復</a> </div> </div> </div> <!--三級評論begin--> <ul class="children"> <volist name="child.children" id="grandson" > <li comment_id="{$grandson.id}"> <div > <div> <img class="head-pic" src="{$grandson.head_pic}" </div> <div class="children-cm"> <div class="cm-header"> <span>{$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" >回復</a> --> </div> </div> </div> </li> </volist> </ul> <!--三級評論end--> </li> </volist> </ul> <!--二級評論end--> </li> </volist> </ul> <!--一級評論列表end--> </div> </div> <!--評論列表顯示區end--></div></body></html>sql語句:
DROP TABLE IF EXISTS `t_comment`;CREATE TABLE `t_comment` ( `id` int(11) NOT NULL AUTO_INCREMENT COMMENT '主鍵id', `parent_id` int(11) NOT NULL COMMENT '上級評論id,若是一級評論則為0', `nickname` varchar(100) DEFAULT NULL COMMENT '評論人昵稱', `head_pic` varchar(400) DEFAULT NULL COMMENT '評論人頭像', `content` text COMMENT '評論內容', `create_time` datetime DEFAULT NULL COMMENT '評論或回復發表時間', PRIMARY KEY (`id`)) ENGINE=MyISAM AUTO_INCREMENT=148 DEFAULT CHARSET=utf8;
頁面布局少一個jquery.js請自行加上。
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