制作一个投票系统 在查看详情 能看到投票总票数与各个选项之间的关系：
难点：
$conn = new mysqli("localhost","root","","ceshi");
if($conn->connect_error){
die("连接失败");
}
$sql_sum = "select sum(number) from toupiao";
$result_sum = $conn->query($sql_sum);
$attr_sum = $result_sum->fetch_row();
$sql = "select id,number from toupiao";
$result = $conn->query($sql);
$attr = $result->fetch_all();
$str = "";
for($i=0;$i<count($attr);$i++){
$bfb = $attr[$i][1]/$attr_sum[0]*100;
$str.="<div><span>{$attr[$i][0]}</span><span>{$bfb}%</span></div> <div class='a'><div class='b' style='{$bfb}%'></div></div>";
}
echo $str;
?>
下面是主页：
<!DOCTYPE html> <html lang="zh"> <head> <meta charset="UTF-8" /> <meta name="viewport" content="width=device-width, initial-scale=1.0" /> <meta http-equiv="X-UA-Compatible" content="ie=edge" /> <title>投票</title> </head> <body> 你35岁前的职业规划是什么？ <form action="chuli.php " method="post"> <input type="checkbox" name="tp[]" value="1" />aaaaa<br /> <input type="checkbox" name="tp[]" value="2" />bbbbb<br /> <input type="checkbox" name="tp[]" value="3" />ccccc<br /> <input type="checkbox" name="tp[]" value="4" />ddddd<br /> <input type="checkbox" name="tp[]" value="5" />fffff<br /> <input type="submit" value="投票"/><br /> <a href="jindutiao.php">查看详情</a> </form> </body> </html>
接下来是php简单处理页面
<?php $tp=$_POST['tp']; $str=join("','",$tp); $diyi = "localhost"; $user = "root"; $disanbu = ""; $disibuname = "ceshi"; $conn = new mysqli($diyi,$user,$disanbu,$disibuname); if($conn->connect_error){ die("连接失败"); } $sql = "update toupiao set number = number+1 where id in('{$str}')"; if($result = $conn->query($sql)){ header("location:toupiao.php"); } ?>
在接下来 就是 查看详情显示 进度条样式的总占比：
<!DOCTYPE html> <html lang="zh"> <head> <meta charset="UTF-8" /> <meta name="viewport" content="width=device-width, initial-scale=1.0" /> <meta http-equiv="X-UA-Compatible" content="ie=edge" /> <title>Document</title> <style> .a{ 100px; height: 10px; border: 1px solid black; } .b{ height: 100%; background-color: red; } </style> </head> <body> <?php $conn = new mysqli("localhost","root","","ceshi"); if($conn->connect_error){ die("连接失败"); } $sql_sum = "select sum(number) from toupiao"; $result_sum = $conn->query($sql_sum); $attr_sum = $result_sum->fetch_row(); $sql = "select id,number from toupiao"; $result = $conn->query($sql); $attr = $result->fetch_all(); $str = ""; for($i=0;$i<count($attr);$i++){ $bfb = $attr[$i][1]/$attr_sum[0]*100; $str.="<div><span>{$attr[$i][0]}</span><span>{$bfb}%</span></div> <div class='a'><div class='b' style='{$bfb}%'></div></div>"; } echo $str; ?> <a href="toupiao.php">返回</a> </body> </html><?php ?>
最后效果