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php模仿qq空间或朋友圈发布动态、评论动态、回复评论、删除动态或评论的功能(中)

在上一篇随笔中已经将如何发布动态呈现了,那么现在来看一下剩下的评论动态、回复评论、删除动态和评论功能,这几个功能会有点绕~~~

一、思路如下:

(1)你发表动态之后,会有人评论这一条动态,当评论之后,你也会回复该评论;(此处评论要单独一张表,回复也要单独一张表)

(2)删除动态:会将动态连同评论、回复全部删除;删除评论:只会删除该条评论

二、在写代码之前,我还是想把流程说一遍:

(1)发表动态---评论---回复---再回复

(2)将上边的流程细化,我先在纸上写出,再上传,码字不能表达清楚(注意的是,我想要的功能的实现,并不是一模一样的哈)

三、还是先将代码分块解释,最后将主页面代码完全附上(含上一篇)

在上一篇中已经实现发布动态、弹出评论框,那么现在接着向下走:

分别看一下qqfriends,qqdongtai,qqpinglun,qqhuifu表,这是初始状态:

先以用户李四登录,由数据库qqfriends表中知道,李四的好友是zhangsan, 和zhaoliu,那么他的空间中显示的好友动态如下:

与上一篇相比,在这一篇中,谁登录的我用中文显示的:

<?php
   session_start();
   $uid = "";
   if(empty($_SESSION["uid"]))
   {
    header("location:login.php");
    exit;
   }
   $uid = $_SESSION["uid"];
   require "../DB.class.php";
   $db = new DB();
   $sql = "select name from qqusers where uid='{$uid}'";
   $name = $db->strquery($sql);
   echo "欢迎:"."<span class='qid' yh='{$uid}'>{$name}</span>";
   ?>

第一步:评论

1、评论张三的动态,点击“确定”后,就是第二张图了~

2、并将评论的内容写进数据库

 //定义空字符串,容纳评论的id  
  var code=""; 
 $(".pl").click(function(){     
    code = $(this).attr("code"); //将评论的id重新赋值                 
    }) 
//将评论写进数据库 
$("#tjpl").click(function(){
  var plnr = $(".pldt").val();
  var plid = code; //取发动态的id
  $.ajax({
  url:"pl-cl.php",
  data:{plnr:plnr,plid:plid},
  type:"POST",
  dataType:"TEXT",
  success:function(data){
   alert("评论成功!");
   window.location.href="main.php" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" ;
  }      
  });            
 }) 

pl-cl.php页面<br><br>

<?php
require "../DB.class.php";
$db = new DB();
session_start();
$uid = $_SESSION["uid"];
$plnr = $_POST["plnr"];
$dtid = $_POST["plid"];
$time = date("Y-m-d H:i:s", time());
$sql = "insert into qqpinglun values ('','{$dtid}','{$uid}','{$plnr}','{$time}')";
$db->query($sql,0);
?>

查看qqpinglun表中是不是多了这一条 “为什么开心呢?”:

3、读取评论内容:

<!--读取评论内容--> 
<div id="dqpl">
<?php
 $sql = "select * from qqpinglun";
 $arr = $db->query($sql);
 foreach($arr as $v)
 {
  $sql = "select * from qqdongtai where dtid='{$v[1]}'";
  $arr2 = $db->query($sql);
  foreach($arr2 as $m)
  {
   //取发动态的姓名
   $sql = "select name from qqusers where uid='{$v[2]}'";
   $name = $db->strquery($sql);
   //若果是登录者评论则显示“我”
   if($v[2]==$uid)
   {
    $name ="我";
   }
   //获取被评论者的姓名
   $sql = "select name from qqusers where uid=(select uid from qqdongtai where dtid='{$v[1]}')";
   $bpl = $db->strquery($sql);
   echo "<div class='a'><span class='xm'>{$name}</span>评论<span class='xm'>{$bpl}</span>的动态:{$m[2]}<div>
    <div class='b'>{$v[3]}</div>
   <div class='c'>发表评论时间:{$v[4]}</div>
   <div class='d'><button class='btn btn-primary hf' ids ='{$v[0]}'>回复
   </button><span><a href='scpl-cl.php?code={$v[0]}'>删除评论</a></span></div>";
  }
 }  
?>    
</div>

第二步:回复

1、回复刚刚的评论:

2、将回复内容写进数据库

   //定义空字符串,容纳回复评论的id  
    var ids=""; 
    $(".hf").click(function(){     
       ids = $(this).attr("ids"); //将评论的id重新赋值  
//       alert((ids)); 
       $('#mM').modal('show');              
       }) 
   //将回复评论写进数据库 
   $("#tjhf").click(function(){
     var hfnr = $(".hfpl").val();
//     alert(hfnr);
//     alert(ids);
     $.ajax({
     url:"hf-cl.php",
     data:{hfnr:hfnr,ids:ids},
     type:"POST",
     dataType:"TEXT",
     success:function(data){
     alert("回复成功!");
    window.location.href="main.php" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" ;
     }      
     });            
    }) 

 hf-cl.php页面

<?phprequire "../DB.class.php";
$db = new DB();
session_start();
$uid = $_SESSION["uid"];
$hfnr = $_POST["hfnr"];
$cid = $_POST["ids"];
$time = date("Y-m-d H:i:s", time());
$sql = "insert into qqhuifu values ('','{$cid}','{$uid}','{$hfnr}','{$time}')";
$db->query($sql,0);
?>

 查看qqhuifu表,是不是多了一行呢?

3、将回复内容读出:

<div id="dqhf"> 
     <!--取一次回复-->
    <?php
    $sql = "select * from qqhuifu where cid in (select cid from qqpinglun)";
    $arr = $db->query($sql);
    foreach($arr as $a)
    {
     $sql = "select * from qqpinglun where cid='{$a[1]}'";
     $arr2 = $db->query($sql);
     foreach($arr2 as $n)
     {
      //取评论动态的姓名
      $sql = "select name from qqusers where uid='{$a[2]}'";
      $name = $db->strquery($sql);
      //若果是登录者评论则显示“我”
      if($a[2]==$uid)
      {
       $name ="我";
      }
      //获取被回复评论的姓名
      $sql = "select name from qqusers where uid=(select uid from qqpinglun where cid='{$a[1]}')";
      $bpl = $db->strquery($sql);
      echo "<div class='a'><span class='xm'>{$name}</span>回复<span class='xm'>{$bpl}</span>的评论:{$n[3]}<div>
       <div class='b'>{$a[3]}</div>
      <div class='c'>回复时间:{$a[4]}</div>
      <div class='d'><button class='btn btn-primary hf' ids ='{$a[0]}'>回复
      </button><span><a href='schf-cl.php?code={$a[0]}'>删除回复</a></span></div>"; 
     }
     }
    ?>
   </div>

回复内容已经显示了:

第三步:删除

1、删除动态:(含评论和回复)

scdt-cl.php

<?php
$code = $_GET["code"];
require "../DB.class.php";
$db = new DB();
$sql = "delete from qqdongtai where dtid='{$code}'";
$db->query($sql,0);
$sql2 = "delete from qqpinglun where dtid='{$code}'";
$db->query($sql2,0);
$sql3 = "delete from qqhuifu where cid=(select cid from qqpinglun where dtid='{$code}')";
$db->query($sql3,0);
header("location:main.php");
?>

2、删除评论:(含回复)

scpl-cl.php

<?php
$code = $_GET["code"];
require "../DB.class.php";
$db = new DB();
$sql2 = "delete from qqpinglun where cid='{$code}'";
$db->query($sql2,0);
$sql3 = "delete from qqhuifu where cid='{$code}'";
$db->query($sql3,0);
header("location:main.php");
?>

3、删除回复:(只自己)

schf-cl.php

<?php
$code = $_GET["code"];
require "../DB.class.php";
$db = new DB();
$sql2 = "delete from qqpinglun where cid='{$code}'";
$db->query($sql2,0);
$sql3 = "delete from qqhuifu where cid='{$code}'";
$db->query($sql3,0);
header("location:main.php");
?>

 关于删除就不依次试了~~~注意包含关系就好了

主页面全部代码:

<!DOCTYPE html>
<html> 
 <head>
  <meta charset="UTF-8">
  <title></title>
   <!--引入bootstrap的css文件-->
  <link type="text/css" rel="stylesheet" href="../bootstrap-3.3.7-dist/css/bootstrap.min.css" rel="external nofollow" />
  <!--引入js包-->
  <script src="../jquery-3.2.0.js"></script>
  <!--引入bootstrap的js文件-->
  <script src="../bootstrap-3.3.7-dist/js/bootstrap.min.js"></script>
  <style>
   #body{
    height: auto;
    width: 1000px;
    margin: 0px auto;
   }
   #xdt{
    height: 200px;
    width:1000px; 
    border: 1px solid cadetblue;
    }
    /*动态和评论div*/
    .fdt{
    position: relative;  
    width: 1000px;
    }
    /*读取内容div*/
     #nr{
     width: 1000px;
     }
    /*谁发表动态样式*/
    .a{
    float: left;
    min-height:40px;
    width: 1000px;
    background-color: goldenrod;
    }
    /*姓名*/
    .xm{
    font-size: 18px;
    color: brown;
    font-weight: bold;
    }
    /*发表动态样式内容*/
    .b{
    float: left;
    text-align: left;
    height:100px;
    line-height: 50px;
    width: 100%;
    background-color: greenyellow;
    }
    /*发表时间与回复删除样式*/
    .c{
    height:30px;
    width: 800px;
    float: left;
    font-size: 12px;
    text-align:right;
    background-color: gainsboro;
     }
     /*弹出模态框评论框*/
    .d{
    height:30px;
    width: 200px;
    float: left;
    font-size: 15px;
    text-align:center;
    background-color: gainsboro;
     }
     /*读取评论div*/
     #dqpl{
     width: 1000px;
     }
    #dqhf
    {
     width: 1000px;
     }
  </style>     
 </head>
 <body>
  <div id="body">
  <?php
   session_start();
   $uid = "";
   if(empty($_SESSION["uid"]))
   {
    header("location:login.php");
    exit;
   }
   $uid = $_SESSION["uid"];
   require "../DB.class.php";
   $db = new DB();
   $sql = "select name from qqusers where uid='{$uid}'";
   $name = $db->strquery($sql);
   //这种方法可以取到uid。
   echo "欢迎:"."<span class='qid' yh='{$uid}'>{$name}</span>";
   ?>
  <!--写动态-->
  <div id="xdt">
   <p>发表动态:</p>
   <textarea cols="100px" rows="5px" name="xdt" class="xdt"></textarea>
   <input type="submit" value="发表" id="fb" />  
  </div>
  <!--动态内容结束-->
  <!--容纳动态内容--> 
  <div class="fdt">
   <p style="color: brown; font-family: '微软雅黑';font-weight: bold;font-size: 20px; margin-bottom: 20px; margin-top: 20px;">朋友动态:<p>
   <!--读取动态内容-->
   <div id="nr">
    <?php
    $date = date ("Y-m-d H:i:s");
    $sql = "select * from qqdongtai where uid='{$uid}' or uid in (select uid from qqfriends where fname =(select name from qqusers where uid='{$uid}')) order by time desc";
    //echo $sql;
    $arr = $db->query($sql);
//    var_dump($arr);
    foreach($arr as $v)
    {
     $sql = "select name from qqusers where uid='{$v[1]}'";
     $name = $db->strquery($sql);
     if($v[1]==$uid)
     {
      $name = "我";
     }
     echo "<div class='a'><span class='xm'>{$name}</span>发表动态:</div>
     <div class='b'>{$v[2]}</div>
     <div class='c'>发表动态时间:{$v[3]}</div>
     <div class='d'><button class='btn btn-primary pl' data-toggle='modal' data-target='#myModal' code ='$v[0]'>评论</button>
      <span><a href='scdt-cl.php?code={$v[0]}'>删除动态</a></span></div>";
    }
    ?>
   </div>   
     <!--读取评论内容--> 
   <div id="dqpl">
   <?php
    $sql = "select * from qqpinglun";
    $arr = $db->query($sql);
    foreach($arr as $v)
    {
     $sql = "select * from qqdongtai where dtid='{$v[1]}'";
     $arr2 = $db->query($sql);
     foreach($arr2 as $m)
     {
      //取发动态的姓名
      $sql = "select name from qqusers where uid='{$v[2]}'";
      $name = $db->strquery($sql);
      //若果是登录者评论则显示“我”
      if($v[2]==$uid)
      {
       $name ="我";
      }
      //获取被评论者的姓名
      $sql = "select name from qqusers where uid=(select uid from qqdongtai where dtid='{$v[1]}')";
      $bpl = $db->strquery($sql);
      echo "<div class='a'><span class='xm'>{$name}</span>评论<span class='xm'>{$bpl}</span>的动态:{$m[2]}<div>
       <div class='b'>{$v[3]}</div>
      <div class='c'>发表评论时间:{$v[4]}</div>
      <div class='d'><button class='btn btn-primary hf' ids ='{$v[0]}'>回复
      </button><span><a href='scpl-cl.php?code={$v[0]}'>删除评论</a></span></div>";
     }
    }  
   ?>    
   </div>
   <!--读取回复的内容--> 
   <div id="dqhf"> 
    <?php
    $sql = "select * from qqhuifu where cid in (select cid from qqpinglun)";
    $arr = $db->query($sql);
//    var_dump($arr);
    foreach($arr as $a)
    {
     $sql = "select * from qqpinglun where cid='{$a[1]}'";
     $arr2 = $db->query($sql);
//     var_dump($arr2);
     foreach($arr2 as $n)
     {
      //取评论动态的姓名
      $sql = "select name from qqusers where uid='{$a[2]}'";
      $name = $db->strquery($sql);
      //若果是登录者评论则显示“我”
      if($a[2]==$uid)
      {
       $name ="我";
      }
      //获取被回复评论的姓名
      $sql = "select name from qqusers where uid=(select uid from qqpinglun where cid='{$a[1]}')";
      $bpl = $db->strquery($sql);
      echo "<div class='a'><span class='xm'>{$name}</span>回复<span class='xm'>{$bpl}</span>的评论:{$n[3]}<div>
       <div class='b'>{$a[3]}</div>
      <div class='c'>回复时间:{$a[4]}</div>
      <div class='d'><button class='btn btn-primary hf' ids ='{$a[0]}'>回复
      </button><span><a href='schf-cl.php?code={$a[0]}'>删除回复</a></span></div>"; 
     }
     }
    ?>
   </div>
  </div>
  <!-- 评论模态框(Modal) -->
   <div class="modal fade" id="myModal" tabindex="-1" role="dialog" aria-labelledby="myModalLabel" aria-hidden="true">
    <div class="modal-dialog">
     <div class="modal-content">
      <div class="modal-header">
       <button type="button" class="close" data-dismiss="modal" aria-hidden="true">×</button>
       <h4 class="modal-title" id="myModalLabel">评论</h4>
      </div>
      <textarea class="modal-body pldt" cols="80px"></textarea>
      <div class="modal-footer">
       <button type="button" class="btn btn-default" data-dismiss="modal">关闭</button>
       <button type="button" class="btn btn-primary" id="tjpl">提交评论</button>
      </div>
     </div>
    </div>
   </div> 
   <!--模态框结束-->    
  <!-- 回复模态框(Modal) -->
   <div class="modal fade" id="mM" tabindex="-1" role="dialog" aria-labelledby="myModalLabel" aria-hidden="true">
    <div class="modal-dialog">
     <div class="modal-content">
      <div class="modal-header">
       <button type="button" class="close" data-dismiss="modal" aria-hidden="true">×</button>
       <h4 class="modal-title" id="myModalLabel">回复</h4>
      </div>
      <textarea class="modal-body hfpl" cols="80px"></textarea>
      <div class="modal-footer">
       <button type="button" class="btn btn-default" data-dismiss="modal">关闭</button>
       <button type="button" class="btn btn-primary" id="tjhf">提交回复</button>
      </div>
     </div>
    </div>
   </div> 
   <!--模态框结束--> 
  </div> 
 </body>
</html>
   <script>
//ajax方法:刷新页面时将内容读取出来,并按发表时间读出来
//    $.ajax({
//     url:"sx-cl.php",
//     dataType:"TEXT",
//     success:function(data){
//      var hang = data.trim().split("|");
//      var str="";
//      for(var i=0;i<hang.length;i++)
//      {
//       var lie = hang[i].split("^");        
//        str = str + "<div class='a'><span class='xm'>"+lie[1]+"</span>发表动态:</div><div class='b'><p>"+lie[2]+"</p><div class='c'>发表动态时间:"+lie[3]+"</div>";              
//       str =str+"<div id='d'><button class='btn btn-primary pl' data-toggle='modal' data-target='#myModal' code ='"+lie[0]+"'>评论</button><span><a href='del.php?code="+lie[0]+"'>删除动态</a></span></div>";
//      }
//      $("#nr").html(str);
//     //点击“评论按钮”实现将code值传到模态框的“提交按钮”
//     //为什么放在此处:因为ajax是异步的,如果不放在此处会加不上点击事件
//       $(".pl").click(function(){
//        code = $(this).attr("code"); //将评论的id重新赋值             
//       })     
//     } 
//    }); 
//    
//php方法: 当发表动态时,将动态内容写进数据库,并刷新页面
    $("#fb").click(function(){
    var dt= $(".xdt").val();
    var uid = $(".qid").attr("yh");
    $.ajax({
     url:"main-cl.php",
     data:{dt:dt},
     type:"POST",
     dataType:"TEXT",
     success:function(data){
      alert("发表动态成功!");
      window.location.href="main.php" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" ;
     } 
    });
    }) 
    //定义空字符串,容纳评论的id  
     var code=""; 
    $(".pl").click(function(){     
       code = $(this).attr("code"); //将评论的id重新赋值                 
       }) 
   //将评论写进数据库 
   $("#tjpl").click(function(){
     var plnr = $(".pldt").val();
     var plid = code; //取发动态的id
//    alert(plnr);
//    alert(plid); 
     $.ajax({
     url:"pl-cl.php",
     data:{plnr:plnr,plid:plid},
     type:"POST",
     dataType:"TEXT",
     success:function(data){
      alert("评论成功!");
      window.location.href="main.php" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" ;
     }      
     });            
    }) 
   //定义空字符串,容纳回复评论的id  
    var ids=""; 
    $(".hf").click(function(){     
       ids = $(this).attr("ids"); //将评论的id重新赋值  
//       alert((ids)); 
       $('#mM').modal('show');              
       }) 
   //将回复评论写进数据库 
   $("#tjhf").click(function(){
     var hfnr = $(".hfpl").val();
//     alert(hfnr);
//     alert(ids);
     $.ajax({
     url:"hf-cl.php",
     data:{hfnr:hfnr,ids:ids},
     type:"POST",
     dataType:"TEXT",
     success:function(data){
     alert("回复成功!");
    window.location.href="main.php" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" ;
     }      
     });            
    }) 
 </script>

到此处为止,动态的发布、动态的评论、动态的回复、动态的删除都已经写完了,但是有个问题还还还没解决完,也就是回复的回复问题。请看下面的简图:

也就是回复表中有一部分是回复的评论,而剩余的部分则是回复的回复(有点绕)想看的就继续关注(下)未完待续~~~

 

先总结一下遇到的问题:

(1)为什么ajax输出的button添加不上点击事件?

     因为ajax是异步ajax,所以要紧接其后。

(2)为什么取不到button的值------this

(3)一个php页面中,什么时候用ajax?什么时候用php?

    在这个实例中,我用ajax将数据写进数据库;用php从数据库读取内容。(上一篇中,动态是用ajax读取的,在这一篇中,两种方法都有,详情请看全部代码)

(4)最后,逻辑清晰很关键,尤其是表与表之间的关联。

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