php教程

超轻量级php框架startmvc

php查询操作实现投票功能

更新时间:2020-03-09 02:52:56 作者:startmvc
本文实例为大家分享了php查询操作实现投票功能的代码,供大家参考,具体内容如下题目:

本文实例为大家分享了php查询操作实现投票功能的代码,供大家参考,具体内容如下

题目:

解题方法汇总:

方法一: 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>
<style>
#list
{
 width:400px;
 height:300px;}
#jieguo
{
 width:400px;
 height:300px;}
.x
{
 
 float:left;}
 
</style>
</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($sql,$type=0,$db="mydb")
 {
 //造连接对象
 $dbconnect=new MySQLi($this->host,$this->uid,$this->password,$db);
 //判断连接是否出错
 !mysqli_connect_error() or die("连接失败!");
 //执行sql语句
 $result=$dbconnect->query($sql);
 //判断SQL语句类型
 if($type==0)
 {
 //如果是查询语句返回结果集的二维数组
 return $result->fetch_all();
 }
 else
 {
 //如果是其他语句,返回true或false
 return $result;
 } 
 }
 
 }

方法二:

1. 投票主页面:


<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>投票</title>
<style>
.x
{
 
 float:left;}
 
</style>
</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">
<a href="ChaKan.php"><input type="button" value="查看结果" id="check" ></a>
</form>
</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. 查看投票结果页面:


<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>查看结果</title>
<style>
.x
{
 float:left;}
</style>
</head>
<body>
 
<?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];
echo "<div><h2>{$tmmc}:</h2></div>";
//从调研选项表中输出选项内容:
$sqlxx="select * from diaoyanxuanxiang where timudaihao='{$arr[0][0]}'";
$arrxx=$db->query($sqlxx);
 
//计算总人数:
$sqlzs="select sum(numbers) from diaoyanxuanxiang where timudaihao='{$arr[0][0]}'";
$zrs=$db->query($sqlzs);
 
foreach ($arrxx as $v)
{
 $name=$v[1];//调研项目名称
 $number=$v[2];//选择该项的人数
 //判断总人数是否为0
 if($zrs[0][0]==0)
 {
 $bfb = 0;
 }
 else
 {
 $bfb = ($number/$zrs[0][0])*100;//求百分比
 }
 
 $bfb=round($bfb,2); //取小数点后两位
 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><br />
 </div><br />"; 
}
?>
<br />
<a href="TouPiao.php"><input type="button" value="返回"></a>
</body>
</html>

显示结果:

以上就是本文的全部内容,希望对大家学习php程序设计有所帮助。

php 查询 投票