1. 投票主页面：
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>投票</title>
</head>
<body>
<form action="TouChuLi.php" method="post">
<?php
include ("DBDA.class.php");
$db=new DBDA();
//从调研题目表中找出题目代号和名称
$sql="select * from diaoyantimu limit 0,1";
$arr=$db->query($sql);
$tmmc=$arr[0][1];
$tmdh=$arr[0][0];
echo "<div><h2>{$tmmc}:</h2></div>";
//从调研选项表中输出选项内容：
$sqlxx="select * from diaoyanxuanxiang where timudaihao='{$tmdh}'";
$arrxx=$db->query($sqlxx);
echo "<div id='list'>";
foreach ($arrxx as $v)
{
echo "<div><input type='checkbox' value='{$v[0]}' name='xx[]'>{$v[1]}</div><br />";
}
?>
<input type="submit" value="提交">
<input type="button" value="查看结果" id="check" onclick="Showjieguo()">
</form>
</div>
<div id="jieguo" style="display:none">
<?php
//计算总人数：
$sqlzs="select sum(numbers) from diaoyanxuanxiang where timudaihao='{$tmdh}'";
$zrs=$db->query($sqlzs);
foreach ($arrxx as $v)
{
$name=$v[1];
$number=$v[2];
if($zrs[0][0]==0)
{
$bfb = 0;
}
else
{
$bfb = ($number/$zrs[0][0])*100;
}
$bfb=round($bfb,2);
echo "<div>
<span class='x'>{$name} </span>
<div class='x' style='width:200px; height:10px; background-color:#808080'>
<div style='width:{$bfb}%; height:10px; background-color:#FF8040'> </div>
</div>
<span class='x'>{$number} </span>
<span class='x'>{$bfb}% </span>
</div>
<br />
";
}
?>
<input type="button" value="返回" id="fanhui" onclick="Showfanhui()">
</div>
<script>
function Showjieguo()
{
document.getElementById("list").style.display="none";
document.getElementById("jieguo").style.display="block";
}
function Showfanhui()
{
document.getElementById("list").style.display="block";
document.getElementById("jieguo").style.display="none";
}
</script>
</body>
</html>
2.处理投票页面：
<?php
$arr=$_POST["xx"];
include ("../DBDA.class.php");
$db=new DBDA();
foreach($arr as $v)
{
$sql = "update diaoyanxuanxiang set numbers = numbers+1 where ids = '{$v}'";
$db->Query($sql,1);//1代表$sql的类型
}
header ("location:TouPiao.php");
?>
3. 建立访问数据库的类,封装用于引用：
<?php
//执行一个sql语句，返回相应的结果
class DBDA
{
public $host="localhost";//数据库服务器地址
public $uid="root";//数据库用户名
public $password="";//数据库密码
//执行SQL语句的方法
//参数里面：$sql代表要执行的sql语句；$type是sql语句的类型，0代表查询，1代表其他(增删改)；$db代表要操作的数据库
function Query($