PHP 练习（投票）
1.建立数据库
表1：DiaoYanTiMu
表2：DiaoYanXuanXiang
2.页面
页面1：投票首页
<!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">
#fanhui{ display:none}
</style>
</head>
<body>
<form action="tpchuli.php" method="post">
<?php
$db = new MySQLi("localhost","root","123","mydb");
$sql = "select * from diaoyantimu";
$result = $db->query($sql);
$attr = $result->fetch_all();
foreach($attr as $v)
{
echo "<div>{$v[1]}</div>";
$sxx = "select * from diaoyanxuanxiang where timudaihao='{$v[0]}'";
$rxx = $db->query($sxx);
$axx = $rxx->fetch_all();
$bs = 0;
if(!empty($_GET["a"]))
{
$bs = $_GET["a"];
}
$s = $bs==1?"none":"block";
echo "<div id='toupiao' style='display:{$s}'>";
foreach($axx as $v1)
{
echo "<div><input type='checkbox' name='tp[]' value='{$v1[0]}' />{$v1[1]}</div>";
}
echo "</div>";
$s1 = $bs==0?"none":"block";
//显示投票结果
echo "<div id='jieguo' style='display:{$s1}'>";
foreach($axx as $v2)
{
$v2[2]; //当前选项的人数
//求总人数
$szrs = "select sum(numbers) from diaoyanxuanxiang where timudaihao='{$v[0]}'";
$rzrs = $db->query($szrs);
$azrs = $rzrs->fetch_row();
$azrs[0]; //总人数
$bfb = ($v2[2]/$azrs[0])*100;
echo "<div>{$v2[1]}<div style='width:100px; height:10px; border:1px solid black;'><div style='width:{$bfb}%; height:10px; </div></div>{$v2[2]} {$bfb}%</div>";
}
echo "</div>";
}
?>
<input type="submit" value="投票" />
<input type="button" id="jg" value="查看结果" onclick="showjg()" />
<input type="button" id="fanhui" value="返回" onclick="showtp()" />
</form>
</body>
<script type="text/javascript">
function showjg()
{
document.getElementById("jieguo").style.display="block";
document.getElementById("toupiao").style.display="none";
document.getElementById("jg").style.display="none";
document.getElementById("fanhui").style.display="block";
}
function showtp()
{
document.getElementById("jieguo").style.display="none";
document.getElementById("toupiao").style.display="block";
document.getElementById("jg").style.display="block";
document.getElementById("fanhui").style.display="none";
}
</script>
</html>
页面2：处理页面
<?php
$attr = $_POST["tp"];
$str = implode("','",$attr);
$sql = "update diaoyanxuanxiang set numbers = numbers+1 where ids in('{$str}')";
$db = new MySQLi("localhost","root","123","mydb");
$db->query($sql);
header("location:toupiao.php?a=1");
