PHP学习：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）
作者：VEPHP 时间 2017-09-12
《PHP学习：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）》要点：
本文介绍了PHP学习：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），希望对您有用。如果有疑问，可以联系我们。
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~~~PHP实例
一、思路如下：PHP实例
(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)PHP实例
(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PHP实例
二、在写代码之前,我还是想把流程说一遍：PHP实例
(1)发表动态---评论---回复---再回复PHP实例
(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)PHP实例
PHP实例
PHP实例
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)PHP实例
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：PHP实例
分别看一下qqfriends,qqdongtai,qqpinglun,qqhuifu表,这是初始状态:PHP实例
PHP实例
PHP实例
PHP实例
PHP实例
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：PHP实例
PHP实例
PHP实例
与上一篇相比,在这一篇中,谁登录的我用中文显示的：PHP实例
<?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PHP实例
1、评论张三的动态,点击“确定”后,就是第二张图了~PHP实例
PHP实例
2、并将评论的内容写进数据库PHP实例
//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实例
<?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?”：PHP实例
PHP实例
3、读取评论内容：PHP实例
<!--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PHP实例
1、回复刚刚的评论：PHP实例
2、将回复内容写进数据库PHP实例
//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PHP实例
<?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?PHP实例
PHP实例
3、将回复内容读出：PHP实例
<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：PHP实例
PHP实例
第三步：删除PHP实例
1、删除动态：(含评论和回复)PHP实例
scdt-cl.phpPHP实例
<?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)PHP实例
scpl-cl.phpPHP实例
<?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)PHP实例
schf-cl.phpPHP实例
<?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PHP实例
主页面全部代码：PHP实例
<!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：PHP实例
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~~~PHP实例
PHP实例
先总结一下遇到的问题：PHP实例
(1)为什么ajax输出的button添加不上点击事件?PHP实例
因为ajax是异步ajax,所以要紧接其后.PHP实例
(2)为什么取不到button的值------thisPHP实例
(3)一个php页面中,什么时候用ajax?什么时候用php?PHP实例
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)PHP实例
(4)最后,逻辑清晰很关键,尤其是表与表之间的关联.PHP实例
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