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".$page."题</p>"; echo "<br/><br/>"; echo "</div>"; ?></body></html>表单接收
check.php
<?phpheader("Content-type:text/html;charset=utf-8");//获取数据库配置require_once("config.php");//连接数据库$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
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