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:

<?phpnamespace 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);     }  });})