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[PHP] php+mysql开发的最简单在线题库(在线做题系统)完整案例

开发技术 开发技术 发布于:2021-08-21 13:27 | 阅读数:347 | 评论:0

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
title --------题目
answer_A -----答案A
answer_B -----答案B
answer_C -----答案C
answer_D -----答案D
true ---------正确答案
score --------得分
DSC0000.png

希望本文所述对大家PHP程序设计有所帮助。

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