• 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";
    					}						
    					});												
    			   })	
    			   		
    			 
    

      

    pl-cl.php页面

    <?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";
    					}						
    					});												
    			   })	
    			   		
    			   		
    

     

     hf-cl.php页面

    <?php
    require "../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"  />
    		<!--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;
    				 1000px;
    				margin: 0px auto;
    			}
    			#xdt{
    				height: 200px;
    				1000px;	
    				border: 1px solid cadetblue;
    			  }
    			  /*动态和评论div*/
    			  .fdt{
    			  	position: relative;	  	
    			  	 1000px;
    			  }
    			   /*读取内容div*/
    	              #nr{
    	             	 1000px;
    	             	
    	             }
    			  /*谁发表动态样式*/
    			  .a{
    			  	float: left;
    			  	min-height:40px;
    			  	 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;
    			     100%;
    			    background-color: greenyellow;
    			  }
    			  /*发表时间与回复删除样式*/
    			   .c{
    			   	height:30px;
    			   	 800px;
    			   	float: left;
    			   	font-size: 12px;
    	            text-align:right;
    	            background-color: gainsboro;
    	             }
    	             /*弹出模态框评论框*/
    	            .d{
    			   	height:30px;
    			   	 200px;
    			   	float: left;
    			   	font-size: 15px;
    	            text-align:center;
    	            background-color: gainsboro;
    	             }
    	            
    	              /*读取评论div*/
    	             #dqpl{
    	             	 1000px;
    	             }
    	            #dqhf
    	            {
    	             	 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";
    					}	
    				});
    				})	
    				
    				//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";
    					}						
    					});												
    			   })	
    			   		
    			  			   	
    		    //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";
    					}						
    					});												
    			   })	
    			   		
    			   		
    			   		   															     																		
    	</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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  • 原文地址:https://www.cnblogs.com/chenguanai/p/6911284.html
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