一、题目要求：建立如下两个数据库，实现投票和%的统计结果：
二、具体编写方法：
（1）、建立数据库：
里面的蓝色背景的表格名称就是我们所需的表格！
表格内容如下：
表名：diaoyantimu
表名：diaoyanxuanxiang
（2）、封装类文件：
<?php class DBDA { public $fuwuqi="localhost"; public $yonghuming="root"; public $mima="root"; public $dbconnect; function Query($sql,$type=1,$shujukuming="test") { $this->dbconnect = new MySQLi($this->fuwuqi,$this->yonghuming,$this->mima,$shujukuming); if(!mysqli_connect_error()) { $result = $this->dbconnect->query($sql); if($type==1) { return $result->fetch_all(); } else { return $result; } } else { return"连接失败"; } } } ?>
（3）、投票页面（shouye.php）：
<!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"> .x { float:left; } #top { width:500px; height:200px; } #bottom { width:500px; height:200px; display:none; } #fanhui { display:none; } </style> </head> <body> <form action="chuli.php" method="post"> <?php include("DBDA.class.php"); $db=new DBDA; $stm="select * from diaoyantimu limit 0,1"; $atm = $db->Query($stm); echo "<div>题目名称：{$atm[0][1]}</div>"; $sxx="select * from diaoyanxuanxiang where timudaihao='{$atm[0][0]}'"; $axx=$db->Query($sxx); echo "<div id='top'>"; foreach($axx as $v) { echo "<div><input type='checkbox' value='{$v[0]}' name='xx[]'/>{$v[1]}</div>"; } echo "</div>"; ?> <div id="bottom"> <?php $sum="select sum(Numbers) from diaoyanxuanxiang where timudaihao='{$atm[0][0]}'"; $asum=$db->Query($sum); $total=$asum[0][0]; foreach($axx as $v) { $bfb=($v[2]/$total)*100; echo "<div><span class='x'>{$v[1]}</span> <div class='x' style='border:1px solid blue;120px; height:12px'> <div style='background-color:red;height:12px;{$bfb}%'></div> </div> <span class='x'> {$v[2]} </span> <span class='x'>{$bfb}%</span> </div> <div style='clear:both'></div>"; } ?> </div> <div id="anniu"> <input type="submit" value="提交"/> <input type="button" value="查看" onclick="ShowResult()"/> </div> <div id="fanhui"><input type="button" value="返回" onclick="Show()" /></div> </form> </body> <script type="text/javascript"> function ShowResult() { document.getElementById("top").style.display="none"; document.getElementById("bottom").style.display="block"; document.getElementById("fanhui").style.display="block"; document.getElementById("anniu").style.display="none"; } function Show() { document.getElementById("top").style.display="block"; document.getElementById("bottom").style.display="none"; document.getElementById("fanhui").style.display="none"; document.getElementById("anniu").style.display="block"; } </script> </html>
（4）、投票处理页面（chuli.php）：
<?php $ids = $_POST["xx"]; include("DBDA.class.php"); $db = new DBDA(); foreach($ids as $v) { $sql = "update diaoyanxuanxiang set Numbers = Numbers+1 where Ids='{$v}'"; $db->Query($sql,0); } header("location:shouye.php");
显示结果如下：
