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>
<"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']"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 = $row["score"];
}
"tiku">
<form action="check.php" method="get">
<p><"radio" name="xuanxiang" value="<">A：<"radio" name="xuanxiang" value="<">B：<"radio" name="xuanxiang" value="<">C：<"radio" name="xuanxiang" value="<">D：<"hidden" name="id" value="<">
<button>提交</button>
</form>
</div>
<br/>
<"<div id='tiku'>";
echo "<ul>";
echo "<li><a href='next.php";
echo "<li><a href='next.php";
echo "</ul>";
echo "<div>";
echo "<br/>";
echo "<p class='fenye_tips'>共".$allpage."道题，当前是第".$page."题</p>";
echo "<br/><br/>";
echo "</div>";
"htmlcode">
<"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";
}else{
echo "<script>alert('错了！扣5分！');history.go(-1);</script>";
}
}
}
"htmlcode">
<"数据库地址";
$username="账号";
$password="密码";
$db="数据库名";
$tb = "表名";
"htmlcode">
<!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>
<"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']"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 = $row["score"];
}
"tiku">
<form action="check.php" method="get">
<p><"radio" name="xuanxiang" value="<">A：<"radio" name="xuanxiang" value="<">B：<"radio" name="xuanxiang" value="<">C：<"radio" name="xuanxiang" value="<">D：<"hidden" name="id" value="<">
<button>提交</button>
</form>
</div>
<br/>
<"<div id='tiku'>";
echo "<ul>";
echo "<li><a href='next.php";
echo "<li><a href='next.php";
echo "</ul>";
echo "<div>";
echo "<br/>";
echo "<p class='fenye_tips'>共".$allpage."道题，当前是第".$page."题</p>";
echo "<br/><br/>";
echo "</div>";
"//img.jbzj.com/file_images/article/201903/201933004535566.png" alt="" />
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