5月8 调研投票练习题
要求操作数据库：因此自己要先创建数据库，数据库的类型及其要求如下图所示：
需要用之前封装好的类：在test0506下DBDA.class.php
<?php
class DBDA
{
public $host = "localhost";//数据库地址
public $uid = "root";//数据库用户名
public $pwd = "";//数据库密码
//执行SQL语句，返回相应的方法
//参数：$sql代表要执行的SQL语句，$type是SQL语句类型0代表查询1代表其他，$db代表要操作的数据库
public function Query($sql,$type=0,$db="mydb")//经常操作的数据库名称
{
//造连接对象
$dbconnect = new MySQLi($this->host,$this->uid,$this->pwd,$db);
//判断连接是否有误
!mysqli_connect_error() or die("连接失败");
//执行SQL语句
$result = $dbconnect->query($sql);
if($type==0)//查询时肯定是返回数组的
{
return $result->fetch_all();
}
else//增删改时只看看执行是否成功即可
{
return $result;
}
}
}
在上一级的类的加载：include("../test0506/DADB.php");
<title>投票</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("../test0506/DBDA.class.php");
$db = new DBDA();
$sql = "select * from diaoyantimu limit 0,1";
$attr = $db->Query($sql);
//var_dump($attr);
$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);
//var_dump($attrxx);
//echo "<div>题目代号：{$tmdh}</div>"
echo "<div id='list'>";
foreach($attrxx as $v)
{
echo "<div>
<input type='checkbox' value='{$v[0]}' name='name[]' />
<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);//所有的人数
//var_dump($attrsum);//$attrsum[0][0]
foreach($attrxx as $v)
{
//选项名称
$name = $v[1];
//投票人数
$shumu = $v[2];
$bfb = ($shumu/$attrsum[0][0])*100;//得票的百分比
$bfb = round($bfb,2);
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'>{$shumu} </span>
<span class='x'>{$bfb}%</span>
</div>";
}
?>
<input type="button" value="返回" id="fanhui" onclick="ShowList()"/>
</div>
</body>
<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>
</html>
处理页面：chuli.php 依旧需要类的加载
<?php
$attr = $_POST["name"];
include("../test0506/DBDA.class.php");
$db = new DBDA();
foreach($attr as $v)
{
$sql = "update DiaoYanXuanXiang set Numbers = Numbers+1 where Ids = '{$v}'";
$db->Query($sql,1);
}
header("location:toupiao.php");
需要注意的：checkbox是可以多选的
另一个方法是在自己练习的基础上的完善：没有加载类，是页面的跳转，不建议使用
主页面------DiaoYan.php
<title>调研练习</title>
</head>
<body>
<form action="DYchuli.php" method="post">
<?php
//造连接对象
$db = new MySQLi("localhost","root","","mydb");
//判断连接是否成功
!mysqli_connect_error() or die("连接失败");
//写SQL语句
$sql = "select * from diaoyantimu";
//执行SQL语句
$result = $db->query($sql);
//从结果集中读取数据
$attr = $result->fetch_all();
//var_dump($attr);
$tmmc = $attr[0][1];
$tmdh = $attr[0][0];
echo "<div>题目名称：{$tmmc}</div>";
$sqlxx = "select * from DiaoYanXuanXiang where TiMuDaiHao = '{$tmdh}'";
$resultxx = $db->query($sqlxx);
$attrxx = $resultxx->fetch_all();
//var_dump($attrxx);
foreach($attrxx as $v)
{
echo "<div><input type='checkbox' value='{$v[0]}' name='xx[]'>{$v[1]}</div>";
}
?>
<br />
<input type="submit" value="提交" />
<a href="tijiao.php"><input type="button" value="查看" /></a>
</form>
</body>
</html>
显示效果
处理页面------DYchuli.php
<?php
$attr = $_POST["xx"];//选项ids代号
$db = new MySQLi("localhost","root","","mydb");
!mysqli_connect_error() or die("连接失败");
foreach($attr as $v)
{
$sql = "update DiaoYanXuanXiang set Numbers = Numbers+1 where Ids = '{$v}'";
$result = $db->query($sql);
if($result)
{
header("location:tijiao.php");
}
else
{
echo "投票失败";
}
}
结果显示的页面-------tijiao.php
<title>无标题文档</title>
<style type="text/css">
.x{ float:left}
</style>
</head>
<body>
<?php
//造连接对象
$db = new MySQLi("localhost","root","","mydb");
!mysqli_connect_error() or die("连接失败");
$sql = "select * from diaoyantimu";
$result = $db->query($sql);
$attr = $result->fetch_all();
//var_dump($attr);
$tmmc = $attr[0][1];
$tmdh = $attr[0][0];
echo "<div>题目名称：{$tmmc}</div>";
$sqlxx = "select * from DiaoYanXuanXiang where TiMuDaiHao = '{$tmdh}'";
$resultxx = $db->query($sqlxx);
$attrxx = $resultxx->fetch_all();
//var_dump($attrxx);
$sqlsum = "select sum(Numbers) from DiaoYanXuanXiang where TiMuDaiHao = '{$tmdh}' ";
$resultsum = $db->query($sqlsum);
$attrsum = $resultsum->fetch_all();
//var_dump($attrsum);
$sum = $attrsum[0][0];//总人数
foreach($attrxx as $v)
{
//选项名称
$name = $v[1];
//投票人数
$ren = $v[2];
if($sum==0)
{
echo $bfb=0;
}
else
{
$bfb = ($ren/$sum)*100;
$bfb = round($bfb,2);
}
echo "<div style='width:350px; 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'>{$ren} </span>
<span class='x'>{$bfb}%</span>
</div>";
}
?>
<br />
<form action="DYchuli.php" method="post">
<a href="DiaoYan.php"><input type="button" value="返回" /></a>
</form>
</body>
</html>
页面显示效果：
