1. 做一个类DBDA 把数据库内容封装进去
<?php
class DBDA{
public $host="localhost"; //服务器地址
public $uid="root"; //用户名
public $pwd="5270437"; //密码
public $dbname="ceshi"; //数据库名称
/*
执行一条SQL语句的方法
@param sql 要执行的SQL语句
@param type SQL语句的类型，0代表查询 1代表增删改
@return 如果是查询语句返回二维数组，如果是增删改返回true或false
*/
public function query($sql,$type=0){
$db = new MySQLi($this->host,$this->uid,$this->pwd,$this->dbname);
$result = $db->query($sql);
if($type){
return $result;
}else{
return $result->fetch_all();
}
}
}
2.做一个数据访问页面
<!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>
</head>
<body>
<h1>投票页面</h1>
<form action="chakantoupiaojieguo.php" method="post">
<?php
require_once "./DBDA.class.php";
$db = new DBDA();
$sql = "select * from diaoyantimu";
$arr = $db->query($sql);
foreach($arr as $v){
echo "<div>{$v[1]}</div>";
$sqlxx = "select * from diaoyanxuanxiang where timudaihao=‘{$v[0]}‘";
$arrxx = $db->query($sqlxx);
foreach($arrxx as $vxx){
echo "<div><input type=‘checkbox‘ name = ‘ck[]‘ value=‘{$vxx[0]}‘/>{$vxx[1]}</div>";
}
}
?><input type="submit" value="投票" />
</form>
</body>
</html>
3.做一个处理投票的页面
<?php
$arr = $_POST["ck"];
//var_dump($arr);
require_once "./DBDA.class.php";
$db = new DBDA();
$str = implode("‘,‘",$arr);
$sql = "update diaoyanxuanxiang set numbers = numbers+1 where ids in(‘{$str}‘) ";
$reslut = $db->query($sql,1);
if($reslut){
header("location:toupiaochakan.php");
}else{
echo "投票失败!";
}
?>
4.投票的查看页面跳出百分比
<!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">
.wai{width:200px; height:10px; border:1px solid #F00}
.nei{height:10px; float:left; background-color:#F00}
</style>
</head>
<body>
<h1>投票结果显示</h1>
<?php
require_once "./DBDA.class.php";
$db = new DBDA();
$sql = "select * from diaoyantimu";
$arr = $db->query($sql);
foreach($arr as $v){
echo "<div>{$v[1]}</div>";
$sqlall = "select sum(numbers) from diaoyanxuanxiang where timudaihao=‘{$v[0]}‘";
$arrall = $db->query($sqlall);
$sqlxx = "select * from diaoyanxuanxiang where timudaihao=‘{$v[0]}‘";
$arrxx = $db->query($sqlxx);
foreach($arrxx as $vxx){
$vxx[2];
$arrall[0][0];
$bfb = ($vxx[2]/$arrall[0][0])*100;
echo "<div>{$vxx[1]}<div class=‘wai‘><div class=‘nei‘ style=‘width:{$bfb}%‘></div></div>{$bfb}%{$vxx[2]}</div>";
}
}
?>
</body>
</html>
原文地址：https://www.cnblogs.com/palpitate/p/8316116.html
时间： 2024-10-14 15:59:51