实例四投票
显示页面
<!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>无标题文档</title>
<style type="text/css">
#list{ width:250px; height:200px}
#jieguo{ width:250px; height:200px}
.x{float:left}
</style>
</head>
<body>
<form action="chuli.php" method="post">
<?php
include("DBDA.class.php");
$db = new DBDA();
$sql = "select * from DiaoYanTiMu limit 0,1";
$attr = $db->Query($sql);
$tmmc = $attr[0][1];
$tmdh = $attr[0][0];
echo "<div>题目名称：{$tmmc}</div>";
$sqlxx = "select * from DiaoYanXuanXiang where TiMuDaiHao = '{$tmdh}'";
$attrxx = $db->Query($sqlxx);
echo "<div id='list'>";
foreach($attrxx as $v)
{
echo "<div>
<input type='checkbox' value='{$v[0]}' name='xx[]' />
<span>{$v[1]}</span>
</div>";
}
?>
<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
$sqlsum ="select sum(Numbers) from DiaoYanXuanXiang where TiMuDaiHao = '{$tmdh}'";
$attrsum = $db->Query($sqlsum);//所有人数
foreach($attrxx as $v)
{
$name = $v[1]; //选项名
$number = $v[2]; //选择该项的人数
$bfb = ($number/$attrsum[0][0])*100;
$bfb = round($bfb,2); //取小数点后两位
echo "<div style='width:250px; height:30px'>
<span class='x'>{$name}</span>
<div class='x' style='width:100px; height:8px; border:1px solid red'>
<div style='width:{$bfb}%; height:8px; background-color:red'></div>
</div>
<span class='x'>{$number} </span>
<span class='x'>{$bfb}%</span>
</div>";
}
?>
<input type="button" value="返回" id="fanhui" onclick="ShowList()" />
</div>
<script type="text/javascript">
function ShowJieGuo()
{
document.getElementById("list").style.display = "none";
document.getElementById("jieguo").style.display = "block";
}
function ShowList()
{
document.getElementById("list").style.display = "block";
document.getElementById("jieguo").style.display = "none";
}
</script>
</body>
</html>
处理页面
<?php
$attr = $_POST["xx"];
include("DBDA.class.php");
$db = new DBDA();
foreach($attr as $v)
{
$sql = "update DiaoYanXuanXiang set Numbers = Numbers+1 where Ids = '{$v}'";
$db->Query($sql,0);
}
header("location:index.php");
引用类
<?php
class DBDA
{
public $host="localhost"; //服务器地址
public $uid="root"; //用户名
public $pwd=""; //密码
public $dbconnect; //连接对象
//操作数据库的方法
//$sql代表需要执行的sql语句
//$type代表SQL语句的类型，1代表查询，2代表增删改
//$dbname代表操作的数据库名称
function Query($sql,$type=1,$dbname="1")
{ //造对象建连接
$this->dbconnect=new mysqli($this->host,$this->uid,$this->pwd,$dbname);
//判断连接是否出错
if (!mysqli_connect_error())
{//连接成功执行sql语句
$result=$this->dbconnect->query($sql);
if($type==1)
{ //查询语句
return $result->fetch_all();
}
else
{ //其他语句
return $result;
}
}
else
{
echo "连接失败";
}
}
}
