• 例子 投票系统


    1.建立数据库

    表1:DiaoYanTiMu

    表2:DiaoYanXuanXiang

    2.页面

     页面1:投票首页

    <!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">
    #fanhui{ display:none}
    </style>
    </head>
    
    <body>
    <form action="tpchuli.php" method="post">
    
    <?php
    
    $db = new  MySQLi("localhost","root","123","mydb");
    
    $sql = "select * from diaoyantimu";
    
    $result = $db->query($sql);
    
    $attr = $result->fetch_all();
    
    foreach($attr as $v)
    {
        echo "<div>{$v[1]}</div>";
        
        $sxx = "select * from diaoyanxuanxiang where timudaihao='{$v[0]}'";
        
        $rxx = $db->query($sxx);    
        $axx = $rxx->fetch_all();
        
        $bs = 0;
        if(!empty($_GET["a"]))
        {
            $bs = $_GET["a"];
        }
        
        $s = $bs==1?"none":"block";
        
        echo "<div id='toupiao' style='display:{$s}'>";
        foreach($axx as $v1)
        {
            echo "<div><input type='checkbox' name='tp[]' value='{$v1[0]}' />{$v1[1]}</div>";
        }
        echo "</div>";
        
        $s1 = $bs==0?"none":"block";
        
        //显示投票结果
        echo "<div id='jieguo' style='display:{$s1}'>";
        
        foreach($axx as $v2)
        {
            $v2[2]; //当前选项的人数
            //求总人数
            $szrs = "select sum(numbers) from diaoyanxuanxiang where timudaihao='{$v[0]}'";
            $rzrs = $db->query($szrs);
            $azrs = $rzrs->fetch_row();
            $azrs[0]; //总人数
            
            $bfb = ($v2[2]/$azrs[0])*100;
            
            echo "<div>{$v2[1]}<div style='100px; height:10px; border:1px solid black;'><div style='{$bfb}%; height:10px; background-color:red'></div></div>{$v2[2]} {$bfb}%</div>";
        }
        
        echo "</div>";
    }
    
    ?>
    
     
    <input type="submit" value="投票" />
    <input type="button" id="jg" value="查看结果" onclick="showjg()" />
    <input type="button" id="fanhui" value="返回" onclick="showtp()"  />
    </form>
    </body>
    
    <script type="text/javascript">
    function showjg()
    {
        document.getElementById("jieguo").style.display="block";
        document.getElementById("toupiao").style.display="none";
        document.getElementById("jg").style.display="none";
        document.getElementById("fanhui").style.display="block";
        
    }
    
    function showtp()
    {
        document.getElementById("jieguo").style.display="none";
        document.getElementById("toupiao").style.display="block";
        document.getElementById("jg").style.display="block";
        document.getElementById("fanhui").style.display="none";
    }
    </script>
    </html>

    页面2:处理页面

    <?php
    $attr = $_POST["tp"];
    
    $str = implode("','",$attr);
    
    $sql = "update diaoyanxuanxiang set numbers = numbers+1 where ids in('{$str}')";
    
    $db = new MySQLi("localhost","root","123","mydb");
    $db->query($sql);
    
    header("location:toupiao.php?a=1");
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  • 原文地址:https://www.cnblogs.com/sq45711478/p/6033649.html
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