php+mysql开发的最简单在线题库(在线做题系统)完整案例

wagpig

2019-03-29

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本文实例讲述了php+mysql开发的最简单在线题库。分享给大家供大家参考，具体如下：

题库，对于教育机构，学校，在线教育，是很有必要的，网上也有不少的第三方在线题库系统，但是本次案例，会让有需要的人了解题库的开发思路，其实很简单，无非就是一个表单验证，数据库验证。

1、先构建表单数据

2、把表单数据通过get或者post方式提交到表单验证页面，和数据库进行匹配

3、返回结果，答案正确或者错误

构建表单：

index.php

<!DOCTYPE html>
<html>
<head>
  <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width,initial-scale=1.0,maximum-scale=1.0,user-scalable=0" />
  <meta name="apple-mobile-web-app-capable" content="yes">
  <meta name="apple-mobile-web-app-status-bar-style" content="black">
  <meta name="format-detection" content="telephone=no">
  <title>题库</title>
  <style type="text/css">
    *{list-style: none;margin:0px;padding: 0px;}
    #tiku{
      width: 300px;
      margin:10px auto;
    }
    #tiku ul li{
      float: left;
    }
  </style>
</head>
<body>
<?php
//获取数据库配置
require_once("config.php");
//连接数据库
$con = mysql_connect($host,$username,$password);
//设置数据库字符集 
mysql_query("SET NAMES UTF8");
//查询数据库
mysql_select_db($db, $con);
//查询数据库
//获取最新的1条数据
$all = mysql_num_rows(mysql_query("select * from $tb"));
//定义分页所需的参数
$lenght=1;               //每页显示的数量
@$page=$_GET['page']?$_GET['page']:1;  //当前页
$offset=($page-1)*$lenght;       //每页起始行编号
$allpage=ceil($all/$lenght);      //所有的页数-总数页
$prepage=$page-1;            //上一页    
if($page==1){
  $prepage=1;             //特殊的是当前页是1时上一页就是1
  }
$nextpage=$page+1;
if($page==$allpage){
  $nextpage=$allpage;        //特殊的是最后页是总数页时下一页就是总数页
  }
$sql="select * from $tb order by id ASC limit {$offset},{$lenght}";
$rest=mysql_query($sql);
while($row = mysql_fetch_assoc($rest))
  {
    $id = $row["id"];
    $title = $row["title"];
    $A = $row["answer_A"];
    $B = $row["answer_B"];
    $C = $row["answer_C"];
    $D = $row["answer_D"];
    $true = $row["true"];
    $score = $row["score"];
  }
?>
<div id="tiku">
  <form action="check.php" method="get">
    <p><?php echo $title;?></p>
    <input type="radio" name="xuanxiang" value="<?php echo $A;?>">A：<?php echo $A;?><br>
    <input type="radio" name="xuanxiang" value="<?php echo $B;?>">B：<?php echo $B;?><br>
    <input type="radio" name="xuanxiang" value="<?php echo $C;?>">C：<?php echo $C;?><br>
    <input type="radio" name="xuanxiang" value="<?php echo $D;?>">D：<?php echo $D;?><br><br>
    <input type="hidden" name="id" value="<?php echo $id;?>">
    <button>提交</button>
  </form>
</div>
  <br/>
  <?php
  echo "<div id='tiku'>";
    echo "<ul>";
      echo "<li><a href='next.php?page=$prepage'>上一题</a></li>";
      echo "<li><a href='next.php?page=$nextpage'>下一题</a></li>";
    echo "</ul>";
  echo "<div>";
  echo "<br/>";
  echo "<p class='fenye_tips'>共".$allpage."道题，当前是第".$page."题</p>";
  echo "<br/><br/>";
  echo "</div>";
  ?>
</body>
</html>

表单接收

check.php

<?php
header("Content-type:text/html;charset=utf-8");
//获取数据库配置
require_once("config.php");
//连接数据库
$con = mysql_connect($host,$username,$password);
//设置数据库字符集 
mysql_query("SET NAMES UTF8");
//查询数据库
mysql_select_db($db, $con);
//获取数据
$xuanxiang = $_GET["xuanxiang"];
$id = $_GET["id"];
if (empty($xuanxiang)) {
  echo "<script>alert('请选择一个答案!');history.go(-1);</script>";
}else{
  //查询数据库
  $result = mysql_query("SELECT * FROM $tb WHERE id =".$id);
  while($row = mysql_fetch_array($result))
  {
    $true = $row["true"];
    $next_id = $id+1;
    if($xuanxiang == $true){
      echo "<script>alert('正确！得5分！');location.href='next.php?page=$next_id';</script>";
    }else{
      echo "<script>alert('错了！扣5分！');history.go(-1);</script>";
    }
  }
}
?>

数据库配置

config.php

<?php
//配置文件 - BY TANKING
$host="数据库地址";
$username="账号";
$password="密码";
$db="数据库名";
$tb = "表名";
?>

next.php

下一题

<!DOCTYPE html>
<html>
<head>
  <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width,initial-scale=1.0,maximum-scale=1.0,user-scalable=0" />
  <meta name="apple-mobile-web-app-capable" content="yes">
  <meta name="apple-mobile-web-app-status-bar-style" content="black">
  <meta name="format-detection" content="telephone=no">
  <title>题库</title>
  <style type="text/css">
    *{list-style: none;margin:0px;padding: 0px;}
    #tiku{
      width: 300px;
      margin:10px auto;
    }
    #tiku ul li{
      float: left;
    }
  </style>
</head>
<body>
<?php
//获取数据库配置
require_once("config.php");
//连接数据库
$con = mysql_connect($host,$username,$password);
//设置数据库字符集 
mysql_query("SET NAMES UTF8");
//查询数据库
mysql_select_db($db, $con);
//查询数据库
//获取最新的1条数据
$all = mysql_num_rows(mysql_query("select * from $tb"));
//定义分页所需的参数
$lenght=1;               //每页显示的数量
@$page=$_GET['page']?$_GET['page']:1;  //当前页
$offset=($page-1)*$lenght;       //每页起始行编号
$allpage=ceil($all/$lenght);      //所有的页数-总数页
$prepage=$page-1;            //上一页    
if($page==1){
  $prepage=1;             //特殊的是当前页是1时上一页就是1
  }
$nextpage=$page+1;
if($page==$allpage){
  $nextpage=$allpage;        //特殊的是最后页是总数页时下一页就是总数页
  }
$sql="select * from $tb order by id ASC limit {$offset},{$lenght}";
$rest=mysql_query($sql);
while($row = mysql_fetch_assoc($rest))
  {
    $id = $row["id"];
    $title = $row["title"];
    $A = $row["answer_A"];
    $B = $row["answer_B"];
    $C = $row["answer_C"];
    $D = $row["answer_D"];
    $true = $row["true"];
    $score = $row["score"];
  }
?>
<div id="tiku">
  <form action="check.php" method="get">
    <p><?php echo $title;?></p>
    <input type="radio" name="xuanxiang" value="<?php echo $A;?>">A：<?php echo $A;?><br>
    <input type="radio" name="xuanxiang" value="<?php echo $B;?>">B：<?php echo $B;?><br>
    <input type="radio" name="xuanxiang" value="<?php echo $C;?>">C：<?php echo $C;?><br>
    <input type="radio" name="xuanxiang" value="<?php echo $D;?>">D：<?php echo $D;?><br><br>
    <input type="hidden" name="id" value="<?php echo $id;?>">
    <button>提交</button>
  </form>
</div>
  <br/>
  <?php
  echo "<div id='tiku'>";
    echo "<ul>";
      echo "<li><a href='next.php?page=$prepage'>上一题</a></li>";
      echo "<li><a href='next.php?page=$nextpage'>下一题</a></li>";
    echo "</ul>";
  echo "<div>";
  echo "<br/>";
  echo "<p class='fenye_tips'>共".$allpage."道题，当前是第".$page."题</p>";
  echo "<br/><br/>";
  echo "</div>";
  ?>
</body>
</html>

数据库结构