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:
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<?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>" ;
?>
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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
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//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" ;
}
});
})
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pl-cl.php页面<br><br>
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<?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);
?>
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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:
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<!--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>
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第二步:回复
1、回复刚刚的评论:
2、将回复内容写进数据库
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//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" ;
}
});
})
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hf-cl.php页面
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<?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);
?>
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查看qqhuifu表,是不是多了一行呢?
3、将回复内容读出:
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<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>
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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
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<?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" );
?>
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2、删除评论:(含回复)
scpl-cl.php
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<?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" );
?>
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3、删除回复:(只自己)
schf-cl.php
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<?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" );
?>
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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:
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<!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。