我有一个测验管理系统，需要从数据库中获取数据并在点击下一个按钮时逐个显示数据。
我使用ajax在使用文件读写功能单击下一个按钮后将数据插入数据库。
我希望为我的问题提供更好，更有效的解决方案。
<?php
$host="localhost";
$user="root";
$pass="";
$con=mysqli_connect($host,$user,$pass);//connect to database;
mysqli_select_db($con,'*****');
// Create connection
//$conn = new mysqli($host, $user, $pass);
?>
<html>
<head>
<!--Import Google Icon Font-->
<link href="https://fonts.googleapis.com/icon?family=Material+Icons" rel="stylesheet">
<!--Import materialize.css-->
<link type="text/css" rel="stylesheet" href="css/materialize.min.css" media="screen,projection"/>
<script type="text/javascript" src="https://code.jquery.com/jquery-3.2.1.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/materialize/0.100.2/js/materialize.min.js"></script>
<!--Let browser know website is optimized for mobile-->
<meta name="viewport" content="width=device-width, initial-scale=1.0"/>
<style>
nav {
background-color: #2196F3 !important;
}
.second {
background-color: #61BAE4 !important;
height:45px;
}
.logo {
display: inline-block;
height: 100%;
}
.logo>img {
vertical-align: middle
padding-bottom: 10px;
}
@media only screen and (max-device-width: 480px) {
@media only screen and (max-device-width: 480px) {
.card-panel{
width:280px !important;
}
nav{
width:300px !important;
}
</style>
</head>
<body style="background-color: #969696;">
<div class="row">
<nav>
<div class="nav-wrapper">
<a href="#!" class="brand-logo logo"><img width="60" height="60" src="https://www.timefortest.com/images/logo1.png" alt=""><span>IBPS Portal</span></a>
<a href="#" data-activates="mobile-demo" class="button-collapse"><i class="material-icons">menu</i></a>
<ul class="right hide-on-med-and-down">
<li><a href="#">Dashboard</a></li>
<li><a href="#">Candidates</a></li>
<li><a href="#">Add Question</a></li>
<li><a id="logout" href="logout">Logout</a></li>
<li><a id="logout" href="logout"><i class="material-icons">lock_outline</i></a></li>
</ul>
<!--<ul class="side-nav" id="mobile-demo">
<li><a href="sass.html">Dashboard</a></li>
<li><a href="badges.html">Candidates</a></li>
<li><a href="collapsible.html">Add Question</a></li>
<li><a id="logout" href="logout">Logout</a></li>
<li><a href="sass.html"><i class="material-icons">lock_outline</i></a></li>
</ul>-->
</div>
</nav>
</div>
<!--<nav class="second">
<div class="nav-wrapper">
<div class="col s12">
<a href="#!" class="breadcrumb">Dashboard</a>
<a href="#!" class="breadcrumb">Add Questions</a>
<a href="#!" class="breadcrumb">Multiple Choice</a>
</div>
</div>
</nav>-->
<?php $var=0;?><?php
//<div id="response">
?><form method="POST" action="submitanswer.php" id="answerdata">
<?php
$myfile = fopen("hitcount.txt", "r") or die("Unable to open file!");
$fh=fread($myfile,filesize("hitcount.txt"));
fclose($myfile);
$sql="SELECT description,question,choiceA,choiceB,choiceC,choiceD,choiceE,msqid FROM master_question where msqid=$fh";
if($r=mysqli_query($con,$sql))
{
while($result= $r->fetch_row())
{
?>
<div class="col s12 m12"style="background-color:Orange;">
<div class="row">
<div class="col s6 m6">
<h4 style="color:white;">DESCRIPTION</h4>
<div class="card horizontal" style="height:500px;background-color:white;">
<div class="card-stacked">
<div class="card-content">
<h5> <?php echo $result[0]?> </h4>
</div>
</div>
</div>
</div>
<div class="col s6 m6">
<h4 style="color:white;">QUESTION</h4>
<div class="card horizontal"style="height:500px;background-color:white;">
<div class="card-stacked">
<div class="card-content">
<h5><?php echo $result[1]?></h4>
</br />
<div class="card-stacked"style="padding-top:40px;">
<div class="card-content">
<input type="hidden" name="msqid" value="<?php echo $result[7]?>"/>
<p>
<input type="radio" name="group" id="test1" name="test1" value="<?php echo $result[1]?>" />
<label for="test1"><Strong> <?php echo $result[2]?></strong></label>
</p>
<br />
<p>
<input type="radio" name="group" id="test2" name="test2" value="<?php echo $result[2]?>" />
<label for="test2"><Strong><?php echo $result[3]?></strong></label>
</p>
<br />
<p>
<input type="radio" name="group" id="test3" name="test3" value="<?php echo $result[3]?>" />
<label for="test3"><Strong><?php echo $result[4]?></strong></label>
</p>
<br />
<p>
<input type="radio" name="group" id="test4" name="test4" value="<?php echo $result[4]?>" />
<label for="test4"><Strong><?php echo $result[5]?></strong></label>
</p>
<br />
<p>
<input type="radio" name="group" id="test5" name="test5" value="<?php echo $result[5]?>" />
<label for="test5"><Strong><?php echo $result[6]?></strong></label>
</p>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
<?php } } ?>
<div class="col s12 m12">
<div class="row">
<div class="col s6 m6">
<center>
<input type='button'value='back' class="btn" onclick="document.location.href='decrement.php';"/>
</center>
</div>
<div class="col s6 m6 offset-s3">
<center>
<button type="submit" id="submcq" value="Submit" name="Snext" class="btn btn-success">Next</button></center>
</center>
</div>
</div>
</div>
</div>
</form>
</div>
<script type="text/javascript" src="js/materialize.min.js"></script>
<script src="http://ajax.googleapis.com/ajax/libs/jquery/3.1.1/jquery.min.js"></script>
<script>
$(".button-collapse").sideNav();<!--nav jquery starts-->
$(document).ready(function() {
Materialize.updateTextFields();
$(".button-collapse").sideNav();
$('select').material_select();
});
</script>
<script>
function copy() {
document.getElementById("label").innerHTML = document.getElementById("mySelect").value
}<!--to label the selected value-->
$(document).ready(function() {
$('select').material_select();
}); </script>
<script><!--ajax function to insert answer in answer table-->
$(document).ready(function(){
$("answerdata").on('submit',(function (e){
e.preventDefault();
$.ajax({
type:'POST',
url:'submitanswer.php',
data:$('#answerdata').serialize(),
contentType:true,
cache:true,
processData:true,
success:function(){
alert("worked");
}
});
}));
return false;
});
</script>
</body>
</html>
插入页面：
<?php
$host="localhost";
$user="root";
$pass="";
$con=mysqli_connect($host,$user,$pass);//connect to database;
mysqli_select_db($con,'******');
?>
<?php
if($_SERVER['REQUEST_METHOD']=='POST'){
$msqid=$_POST['msqid'];
$answer=$_POST['group'];
$sql="INSERT INTO review(question_attend,Question_id,answerA,answerB,answerC,answerD,answerE)VALUES('','$msqid','$answer','','','','')";
$query= mysqli_query($con,$sql);
if($query)
{
echo "success";
$fp = fopen('hitcount.txt', 'c+');
flock($fp, LOCK_EX);
$count = (int)fread($fp, filesize('hitcount.txt'));
ftruncate($fp, 0);
fseek($fp, 0);
fwrite($fp, $count + 1);
flock($fp, LOCK_UN);
fclose($fp);
header("Location: newfetch.php");
}
else
{
echo mysqli_error;
}
}
?>