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php查询操作实现投票功能

2020-03-22 18:08:59
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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;} float:left;} /style /head body form action="TouChuLi.php" method="post" 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[]' {$v[1]} /div br /
//计算总人数:$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 {$name} /span div div /div /div span {$number} /span span {$bfb}% /span /div br / input type="button" value="返回" id="fanhui" /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:
$arr=$_POST["xx"];include ("../DBDA.class.php");$db=new DBDA();
$sql = "update diaoyanxuanxiang set numbers = numbers+1 where ids = '{$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:
//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 $result;方法二:1. 投票主页面:
html head meta http-equiv="Content-Type" content="text/html; charset=utf-8" / title 投票 /title style float:left;} /style /head body form action="TouChuLi.php" method="post" include ("../DBDA.class.php");$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:
$arr=$_POST["xx"];include ("../DBDA.class.php");$db=new DBDA();
$sql = "update diaoyanxuanxiang set numbers = numbers+1 where ids = '{$v}'"; $db- Query($sql,1);//1代表$sql的类型header ("location:TouPiao.php");3. 查看投票结果页面:
html head meta http-equiv="Content-Type" content="text/html; charset=utf-8" / title 查看结果 /title style float:left;} /style /head body include ("../DBDA.class.php");$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 {$name} /span div div /div /div span {$number} /span span {$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教程

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