PHP实战之投票系统的实现
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一、实现代码
1.sql
-- phpMyAdmin SQL Dump
-- version 4.5.1
-- http://www.phpmyadmin.net
--
-- Host: 127.0.0.1
-- Generation Time: 2022-03-28 05:42:05
-- 服务器版本：10.1.13-MariaDB
-- PHP Version: 5.6.21
SET SQL_MODE = "NO_AUTO_VALUE_ON_ZERO";
SET time_zone = "+00:00";
;
;
;
;
--
-- Database: `a`
--
-- --------------------------------------------------------
--
-- 表的结构 `voto`
--
CREATE TABLE `voto` (
`id` int(10) NOT NULL,
`titleid` int(10) DEFAULT NULL,
`item` varchar(50) DEFAULT NULL,
`count` int(10) DEFAULT NULL
) ENGINE=InnoDB DEFAULT CHARSET=utf8;
--
-- 转存表中的数据 `voto`
--
INSERT INTO `voto` (`id`, `titleid`, `item`, `count`) VALUES
(24, 1, '张学友', 0),
(25, 1, '陈奕迅', 0),
(26, 1, '林俊杰', 0),
(27, 1, '萧敬腾', 0),
(29, 1, '', 0),
(30, 1, 'aaa', 0);
--
-- Indexes for dumped tables
--
--
-- Indexes for table `voto`
--
ALTER TABLE `voto`
ADD PRIMARY KEY (`id`);
--
-- 在导出的表使用AUTO_INCREMENT
--
--
-- 使用表AUTO_INCREMENT `voto`
--
ALTER TABLE `voto`
MODIFY `id` int(10) NOT NULL AUTO_INCREMENT, AUTO_INCREMENT=31;
;
;
;
2.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
</head>
<body>
<a href="admin.php" rel="external nofollow" >增删改查投票的选项</a>
<br>
<a href="index.php" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >投票给谁呢</a>
</body>
</html>3.admin.php（增删改查投票的页面）密码：admi
<?php
ob_start(); //打开缓冲区
session_start();
header("Content-type:text/html;charset=utf-8");
$link = mysqli_connect('localhost','root','','a');
mysqli_set_charset($link, "utf8");
if (!$link) {
die("连接失败:".mysqli_connect_error());
}
?>
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>PHP+mysql开发的简单投票系统</title>
<style type="text/css">
body { font-family: "宋体"; font-size: 12pt; color: #333333; margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px;background-color: #d4d4d4;}
table { font-family: "宋体"; font-size: 9pt; line-height: 20px; color: #333333}
</style>
<script language="javascript">
function selectAll()
{
node=window.document.frm.itm;
for(i=0;i<node.length;i++)
{
node[i].checked=true;//全选
}
}
function cancelAll()
{
node=frm.itm;
for(i=0;i<node.length;i++)
{
node[i].checked=false;//取消全部
}
}
function del()
{
node=frm.itm;
id="";
for(i=0;i<node.length;i++)
{
if(node[i].checked)
{
if(id=="")//删除
{
id=node[i].value
}
else
{
id=id+","+node[i].value
}
}
}
if(id=="")
{
alert("您没有选择删除项");
}
else
{
location.href="?type=del&id=" rel="external nofollow" +id
}
}
</script>
</head>
<body>
<?php
if(isset($_GET['tj']) == 'out'){
session_destroy();//删除当前用户对应的session文件以及释放session
echo "<script language=javascript>alert('退出成功！');window.location='index.php'</script>";
}
?>
<?php
if(isset($_POST['Submit10'])){
if($_POST['pwd']=='admin'){
$_SESSION['pwd']=2;
echo "<script language=javascript>alert('登陆成功！');window.location='admin.php'</script>";
}else{
echo "<script language=javascript>alert('登陆失败,请检查您的密码！');window.location='admin.php'</script>";
}
}
?>
<?php if($_SESSION['pwd']<>2){ ?>
<form action="" method="post">
<table width="365" border="0" align="center" cellpadding="5" cellspacing="1" bgcolor="#C2C2C2">
<tr>
<td height="30" align="right" bgcolor="#FFFFFF"><label>输入密码：</label></td>
<td align="left" bgcolor="#FFFFFF"><input name="pwd" type="text" id="pwd" /></td>
</tr>
<tr>
<td height="30" colspan="2" align="center" bgcolor="#FFFFFF"><label>
<input name="Submit10" type="submit" id="Submit10" value="登陆" />
</label>
<label>
<input type="reset" name="Submit5" value="重置" />
</label></td>
</tr>
<tr>
<td height="30" colspan="2" align="center" bgcolor="#FFFFFF">
软件版本：<script type="text/javascript" class="lazy" data-src="http://www.04ie.com/net/phpvoto1_1.js"></script></td>
</tr>
</table>
</form>
<?php }else{ ?>
<?php
if(isset($_POST["Submit"]))
{
$title=$_POST["title"];
$sql="update vototitle set vototitle='$title'";
mysqli_query($link,$sql);
?>
<script language="javascript">
alert("修改成功");
</script>
<?php
}
if(isset($_POST["Submit2"]))
{
$newitem=$_POST["newitem"];
$sql="insert into voto (titleid,item,count) values (1,'$newitem',1)";
mysqli_query($link,$sql);
}
?>
<form id="frm" name="frm" method="post" action="" style="margin-bottom:3px;">
<table width="365" border="0" align="center" cellpadding="5" cellspacing="1" bgcolor="#C2C2C2">
<tr>
<td colspan="4" bgcolor="#FFFFFF"><label>
<?php
$sql="select * from vototitle";
$rs=mysqli_query($link,$sql);
$rows=mysqli_fetch_assoc($rs);
?>
<input name="title" type="text" id="title" size="35" value="<?php echo $rows["vototitle"]?>" />
</label></td>
<td width="68" align="center" bgcolor="#FFFFFF"><label>
<input type="submit" name="Submit" value="修改标题" />
</label></td>
</tr>
<tr>
<th width="30" bgcolor="#FFFFFF">编号</th>
<th width="45" bgcolor="#FFFFFF">项目</th>
<th width="52" bgcolor="#FFFFFF">票数</th>
<th width="50" align="center" bgcolor="#FFFFFF">修改</th>
<th align="center" bgcolor="#FFFFFF">删除</th>
</tr>
<?php
$sql="select * from voto order by count desc";
$rs=mysqli_query($link,$sql);
while($rows=mysqli_fetch_assoc($rs))
{
?>
<tr>
<td align="center" bgcolor="#FFFFFF"><input type="checkbox" name="itm" value="<?php echo $rows["id"]?>" /><?php echo $rows["id"]?></td>
<td align="center" bgcolor="#FFFFFF"><?php echo $rows["item"]?></td>
<td align="center" bgcolor="#FFFFFF"><?php echo $rows["count"]?></td>
<td align="center" bgcolor="#FFFFFF"><input type="button" value="修改" onclick="location.href='?type=modify&id=<?php echo $rows["id"]?>'" /></td>
<td align="center" bgcolor="#FFFFFF"><input type="button" value="删除" onclick="location.href='?type=del&id=<?php echo $rows["id"]?>'" /></td>
</tr>
<?php
}
?>
<tr>
<td colspan="5" align="center" bgcolor="#FFFFFF">
<input type="button" value="选择全部" onclick="selectAll()" />
<input type="button" value="取消全部" onclick="cancelAll()" />
<input type="button" value="删除所选" onclick="del()" /> </td>
</tr>
<tr>
<td colspan="3" bgcolor="#FFFFFF"><label>
<input name="newitem" type="text" id="newitem" />
</label></td>
<td colspan="2" bgcolor="#FFFFFF"><label>
<input type="submit" name="Submit2" value="添加新项" />
</label>
<a href="?tj=out" rel="external nofollow" >退出管理</a></td>
</tr>
</table>
</form>
<?php
$type = isset($_GET["type"])?$_GET["type"]:"";
if($type =="modify"){
$id=$_GET["id"];
if(isset($_POST["Submit3"]))
{
$item=$_POST["itm"];
$count=$_POST["count"];
$sql="update voto set item='$item',count=$count where id=$id";
mysqli_query($link,$sql);
echo "<script language=javascript>alert('修改成功！');window.location='admin.php'</script>";
}
$sql="select * from voto where id=$id";
$rs=mysqli_query($link,$sql);
$rows=mysqli_fetch_assoc($rs);
?>
<form id="form1" name="form1" method="post" action="" style="margin-top:2px;">
<table width="365" border="0" align="center" cellpadding="5" cellspacing="1" bgcolor="#C2C2C2">
<tr>
<th colspan="2" bgcolor="#FFFFFF">修改投票项目</th>
</tr>
<tr>
<td align="center" bgcolor="#FFFFFF">名称:</td>
<td bgcolor="#FFFFFF"><label>
<input name="itm" type="text" id="itm" value="<?php echo $rows["item"]?>" />
</label></td>
</tr>
<tr>
<td align="center" bgcolor="#FFFFFF">票数：</td>
<td bgcolor="#FFFFFF"><label>
<input name="count" type="text" id="count" value="<?php echo $rows["count"]?>" />
</label></td>
</tr>
<tr>
<td colspan="2" align="center" bgcolor="#FFFFFF"><label>
<input type="submit" name="Submit3" value="修改" />
<input type="reset" name="Submit" value="重置" />
</label></td>
</tr>
</table>
</form>
<?php
}
?>
<?php
$type = isset($_GET["type"])?$_GET["type"]:"";
if($type =="del"){
$id=$_GET["id"];
$sql="delete from voto where id in ($id)";
mysqli_query($link,$sql);
echo "<script language=javascript>alert('删除成功！');window.location='admin.php'</script>";
}
?>
<?php } ?>
</body>
</html>4.index.php投票的页面
<?php
ob_start();
session_start();
header("Content-type:text/html;charset=utf-8");
$link = mysqli_connect('localhost','root','','a');
mysqli_set_charset($link, "utf8");
if (!$link) {
die("连接失败:".mysqli_connect_error());
}
?>
<!doctype html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>投票系统</title>
<script type="text/javascript" class="lazy" data-src="//cdn.bootcss.com/jquery/1.12.4/jquery.js"></script>
<style type="text/css">
body { font-family: "宋体"; font-size: 12pt; color: #333333; margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px;background-color: #A6C7E1;}
table { font-family: "宋体"; font-size: 9pt; line-height: 20px; color: #333333}
a:link { font-size: 9pt; color: #333333; text-decoration: none}
a:visited { font-size: 9pt; color: #333333; text-decoration: none}
a:hover { font-size: 9pt; color: #E7005C; text-decoration: underline}
a:active { font-size: 9pt; color: #333333; text-decoration: none}
</style>
<script language="javascript">
function check()
{
node=frm.itm;
flag=false;
for(i=0;i<node.length;i++)
{
if(node[i].checked)
{
flag=true;
}
}
if(!flag)
{
alert("您没有选择")
return false;
}
return true;
}
</script>
<?php
if(isset($_POST["submit"])){
if($_POST){
$id = $_POST["selected_id"];
$sql = "update voto set count = count+1 where id=$id";
mysqli_query($link,$sql);
}
if($_SESSION["voto"]==session_id())
{
?>
<script language="javascript">
alert("您已经投票了");
location.href="index.php" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" ;
</script>
<?php
exit();
}
$id=$_POST["itm"];
$sql="update voto set count=count+1 where id=$id";
if(mysqli_query($link,$sql))
{
$_SESSION["voto"]=session_id();
?>
<script language="javascript">alert("投票成功,点确定查看结果");location.href="index.php?id=ck" rel="external nofollow" ;</script>
<?php
}
else
{
?>
<script language="javascript">alert("投票失败");location.href="index.php" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" ;</script>
<?php
}
}
?>
</head>
<body>
<form name="frm" action="" method="post" onsubmit=return(check()) style="margin-bottom:5px;">
<table width="365" border="0" align="center" cellpadding="5" cellspacing="1" bgcolor="#C2C2C2">
<tr>
<th bgcolor="#FFFFCC">
<?php
$sql="select * from vototitle";
$rs=mysqli_query($link,$sql);
$row=mysqli_fetch_assoc($rs);
echo $row["vototitle"];
?> </th>
</tr>
<?php
$sql="select * from voto";
$rs=mysqli_query($link,$sql);
while($rows=mysqli_fetch_assoc($rs))
{
?>
<tr>
<td bgcolor="#FFFFFF"><input type="radio" name="itm" value="<?php echo $rows["id"]?>" />
<?php echo $rows["item"]?></td>
</tr>
<?php
}
?>
<tr>
<td align="center" bgcolor="#FFFFFF">
<input type="submit" name="submit" value="投票"/>
<input type="hidden" id="selected_id" name="selected_id" value="">
<input type="button" value="查看结果" onClick="location.href='index.php?id=ck'"/>
<script type="text/javascript">
$("[type='radio']").click(function(){
$("#selected_id").val($(this).val());
});
</script></td>
</tr>
</table>
</form>
<?php
if(isset($_GET["id"])=="ck"){?>
<?php
$sql="select sum(count) as 'total' from voto";
$rs=mysqli_query($link,$sql);
$rows=mysqli_fetch_assoc($rs);
$sum=$rows["total"]; //得出总票数
$sql="select * from voto";
$rs=mysqli_query($link,$sql);
?>
<table id="click" width="365" border="0" align="center" cellpadding="5" cellspacing="1" bgcolor="#C2C2C2" >
<tr>
<th bgcolor="#FFFFFF">项目</th>
<th bgcolor="#FFFFFF">票数</th>
<th bgcolor="#FFFFFF">百分比</th>
</tr>
<?php
while($rows=mysqli_fetch_assoc($rs))
{
?>
<tr>
<td bgcolor="#FFFFFF"><?php echo $rows["item"]?></td>
<td bgcolor="#FFFFFF"><?php echo $rows["count"]?></td>
<td bgcolor="#FFFFFF">
<?php
$per=$rows["count"]/$sum;
$per=number_format($per,4);
?>
<img class="lazy" data-src="" height="4" width="<?php echo $per*100?>" />
<?php echo $per*100?>% </td>
</tr>
<?php
}
?>
</table>
<div align="center">
<a href="index.php" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >隐藏结果</a>
</div>
<?php } ?>
</body>
</html>二、效果图
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