我正在设计一个在线测验系统的网站。我已经创建了数据库和几个用于登录，添加问题和所有内容的网页。
现在我遇到以下代码中的问题。在这个测验页面中，我有一个提交按钮和下一个问题的一个链接。
submit: to store the user option in database
next: to fetch the next question from database
现在我希望提交按钮的功能是通过下一个链接完成的，当我点击下一个链接时，用户答案必须保存在数据库中，下一个问题必须来自数据库。我怎样才能做到这一点？
该页面的代码是：
{<?php @session_start(); ?>
<?php require_once('Connections/localhost.php'); ?>
<?php
if (!isset($_SESSION)) {
session_start();
}
$MM_authorizedUsers = "3,1";
$MM_donotCheckaccess = "false";
// *** Restrict Access To Page: Grant or deny access to this page
function isAuthorized($strUsers, $strGroups, $UserName, $UserGroup) {
// For security, start by assuming the visitor is NOT authorized.
$isValid = False;
// When a visitor has logged into this site, the Session variable
MM_Username set equal to their username.
// Therefore, we know that a user is NOT logged in if that Session variable
is blank.
if (!empty($UserName)) {
// Besides being logged in, you may restrict access to only certain users
based on an ID established when they login.
// Parse the strings into arrays.
$arrUsers = Explode(",", $strUsers);
$arrGroups = Explode(",", $strGroups);
if (in_array($UserName, $arrUsers)) {
$isValid = true;
}
// Or, you may restrict access to only certain users based on their
username.
if (in_array($UserGroup, $arrGroups)) {
$isValid = true;
}
if (($strUsers == "") && false) {
$isValid = true;
}
}
return $isValid;
}
$MM_restrictGoTo = "Login.php";
if (!((isset($_SESSION['MM_Username'])) &&
(isAuthorized("",$MM_authorizedUsers, $_SESSION['MM_Username'],
$_SESSION['MM_UserGroup'])))) {
$MM_qsChar = "?";
$MM_referrer = $_SERVER['PHP_SELF'];
if (strpos($MM_restrictGoTo, "?")) $MM_qsChar = "&";
if (isset($_SERVER['QUERY_STRING']) && strlen($_SERVER['QUERY_STRING']) > 0)
$MM_referrer .= "?" . $_SERVER['QUERY_STRING'];
$MM_restrictGoTo = $MM_restrictGoTo. $MM_qsChar . "accesscheck=" .
urlencode($MM_referrer);
header("Location: ". $MM_restrictGoTo);
exit;
}
?>
<?php
if (!function_exists("GetSQLValueString")) {
function GetSQLValueString($theValue, $theType, $theDefinedValue = "",
$theNotDefinedValue = "")
{
if (PHP_VERSION < 6) {
$theValue = get_magic_quotes_gpc() ? stripslashes($theValue) : $theValue;
}
$theValue = function_exists("mysql_real_escape_string") ?
mysql_real_escape_string($theValue) : mysql_escape_string($theValue);
switch ($theType) {
case "text":
$theValue = ($theValue != "") ? "'" . $theValue . "'" : "NULL";
break;
case "long":
case "int":
$theValue = ($theValue != "") ? intval($theValue) : "NULL";
break;
case "double":
$theValue = ($theValue != "") ? doubleval($theValue) : "NULL";
break;
case "date":
$theValue = ($theValue != "") ? "'" . $theValue . "'" : "NULL";
break;
case "defined":
$theValue = ($theValue != "") ? $theDefinedValue : $theNotDefinedValue;
break;
}
return $theValue;
}
}
if (!function_exists("GetSQLValueString")) {
function GetSQLValueString($theValue, $theType, $theDefinedValue = "",
$theNotDefinedValue = "")
{
if (PHP_VERSION < 6) {
$theValue = get_magic_quotes_gpc() ? stripslashes($theValue) : $theValue;
}
$theValue = function_exists("mysql_real_escape_string") ?
mysql_real_escape_string($theValue) : mysql_escape_string($theValue);
switch ($theType) {
case "text":
$theValue = ($theValue != "") ? "'" . $theValue . "'" : "NULL";
break;
case "long":
case "int":
$theValue = ($theValue != "") ? intval($theValue) : "NULL";
break;
case "double":
$theValue = ($theValue != "") ? doubleval($theValue) : "NULL";
break;
case "date":
$theValue = ($theValue != "") ? "'" . $theValue . "'" : "NULL";
break;
case "defined":
$theValue = ($theValue != "") ? $theDefinedValue : $theNotDefinedValue;
break;
}
return $theValue;
}
}
if (!function_exists("GetSQLValueString")) {
function GetSQLValueString($theValue, $theType, $theDefinedValue = "",
$theNotDefinedValue = "")
{
if (PHP_VERSION < 6) {
$theValue = get_magic_quotes_gpc() ? stripslashes($theValue) : $theValue;
}
$theValue = function_exists("mysql_real_escape_string") ?
mysql_real_escape_string($theValue) : mysql_escape_string($theValue);
switch ($theType) {
case "text":
$theValue = ($theValue != "") ? "'" . $theValue . "'" : "NULL";
break;
case "long":
case "int":
$theValue = ($theValue != "") ? intval($theValue) : "NULL";
break;
case "double":
$theValue = ($theValue != "") ? doubleval($theValue) : "NULL";
break;
case "date":
$theValue = ($theValue != "") ? "'" . $theValue . "'" : "NULL";
break;
case "defined":
$theValue = ($theValue != "") ? $theDefinedValue : $theNotDefinedValue;
break;
}
return $theValue;
}
}
$currentPage = $_SERVER["PHP_SELF"];
$editFormAction = $_SERVER['PHP_SELF'];
if (isset($_SERVER['QUERY_STRING'])) {
$editFormAction .= "?" . htmlentities($_SERVER['QUERY_STRING']);
}
if ((isset($_POST["MM_insert"])) && ($_POST["MM_insert"] == "cprtc")) {
$insertSQL = sprintf("INSERT INTO usr_ans (u_name, topic, q_id, ansr) VALUES
(%s, %s, %s, %s)",
GetSQLValueString($_POST['uname'], "text"),
GetSQLValueString($_POST['topc'], "text"),
GetSQLValueString($_POST['qid'], "int"),
GetSQLValueString($_POST['RadioGroup1'], "text"));
mysql_select_db($database_localhost, $localhost);
$Result1 = mysql_query($insertSQL, $localhost) or die(mysql_error());
}
if (!function_exists("GetSQLValueString")) {
function GetSQLValueString($theValue, $theType, $theDefinedValue = "",
$theNotDefinedValue = "")
{
if (PHP_VERSION < 6) {
$theValue = get_magic_quotes_gpc() ? stripslashes($theValue) : $theValue;
}
$theValue = function_exists("mysql_real_escape_string") ?
mysql_real_escape_string($theValue) : mysql_escape_string($theValue);
switch ($theType) {
case "text":
$theValue = ($theValue != "") ? "'" . $theValue . "'" : "NULL";
break;
case "long":
case "int":
$theValue = ($theValue != "") ? intval($theValue) : "NULL";
break;
case "double":
$theValue = ($theValue != "") ? doubleval($theValue) : "NULL";
break;
case "date":
$theValue = ($theValue != "") ? "'" . $theValue . "'" : "NULL";
break;
case "defined":
$theValue = ($theValue != "") ? $theDefinedValue : $theNotDefinedValue;
break;
}
return $theValue;
}
}
$colname_User = "-1";
if (isset($_SESSION['MM_Username'])) {
$colname_User = $_SESSION['MM_Username'];
}
mysql_select_db($database_localhost, $localhost);
$query_User = sprintf("SELECT * FROM `user` WHERE Username = %s",
GetSQLValueString($colname_User, "text"));
$User = mysql_query($query_User, $localhost) or die(mysql_error());
$row_User = mysql_fetch_assoc($User);
$totalRows_User = mysql_num_rows($User);
$maxRows_qusnqz = 2;
$pageNum_qusnqz = 0;
if (isset($_GET['pageNum_qusnqz'])) {
$pageNum_qusnqz = $_GET['pageNum_qusnqz'];
}
$startRow_qusnqz = $pageNum_qusnqz * $maxRows_qusnqz;
mysql_select_db($database_localhost, $localhost);
$query_qusnqz = "SELECT * FROM quesns WHERE topic = 'C Language' ORDER BY
q_id ASC";
$query_limit_qusnqz = sprintf("%s LIMIT %d, %d", $query_qusnqz,
$startRow_qusnqz, $maxRows_qusnqz);
$qusnqz = mysql_query($query_limit_qusnqz, $localhost) or
die(mysql_error());
$row_qusnqz = mysql_fetch_assoc($qusnqz);
if (isset($_GET['totalRows_qusnqz'])) {
$totalRows_qusnqz = $_GET['totalRows_qusnqz'];
} else {
$all_qusnqz = mysql_query($query_qusnqz);
$totalRows_qusnqz = mysql_num_rows($all_qusnqz);
}
$totalPages_qusnqz = ceil($totalRows_qusnqz/$maxRows_qusnqz)-1;
$queryString_qusnqz = "";
if (!empty($_SERVER['QUERY_STRING'])) {
$params = explode("&", $_SERVER['QUERY_STRING']);
$newParams = array();
foreach ($params as $param) {
if (stristr($param, "pageNum_qusnqz") == false &&
stristr($param, "totalRows_qusnqz") == false) {
array_push($newParams, $param);
}
}
if (count($newParams) != 0) {
$queryString_qusnqz = "&" . htmlentities(implode("&", $newParams));
}
}
$queryString_qusnqz = sprintf("&totalRows_qusnqz=%d%s", $totalRows_qusnqz,
$queryString_qusnqz);
?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<link href="CSS/Layout 5.css" rel="stylesheet" type="text/css" />
<link href="CSS/Menu.css" rel="stylesheet" type="text/css" />
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Practise Quiz of C</title>
<script src="SpryAssets/SpryValidationRadio.js" type="text/javascript">
</script>
<link href="SpryAssets/SpryValidationRadio.css" rel="stylesheet"
type="text/css" />
</head>
<body>
<div id="Holder">
<div id="Header"></div>
<div id="NavBar">
<nav>
<ul><li> <a href="Home.php" >Home</a></li>
<li> <a href="Login.php" class="active">Login</a></li>
<li> <a href="Regster.php"> Register</a></li>
<li><a href="ForgetPassword.php"> Forgot Password</a></li>
</ul>
</nav>
</div>
<div id="Content">
<div id="PageHeading">
<h1>Welcome, <?php echo $row_User['Fname']; ?> <?php echo
$row_User['Lname']; ?></h1>
</div>
<div id="ContentLeft">
<h2>Account Links:</h2>
<h6> </h6>
<h6># <a href="Update.php">Update Account Info</a></h6>
<h6># <a href="Logout.php">Logout</a></h6>
<h6><br />
</h6>
</div>
<div id="ContentRight">
<?php if ($totalRows_qusnqz > 0) { // Show if recordset not empty ?>
<?php do { ?>
<form action="<?php echo $editFormAction; ?>" id="cprtc" name="cprtc"
method="POST">
<table width="620" border="0" cellpadding="1">
<tr>
<td> </td>
</tr>
<tr>
<td><input name="qid" type="hidden" id="qid" value="<?php echo
$row_qusnqz['q_id']; ?>" />
<input name="uname" type="hidden" id="uname" value="<?php echo
$row_User['Username']; ?>" />
<input name="topc" type="hidden" id="topc" value="<?php echo
$row_qusnqz['topic']; ?>" /></td>
</tr>
<tr>
<td><strong>Question <?php echo ($startRow_qusnqz + 1) ?>:
</strong><strong>
<label for="qsn"></label>
</strong><?php echo $row_qusnqz['quesn']; ?></td>
</tr>
<tr>
<td> </td>
</tr>
<tr>
<td> <span id="spryradio1">
<label>
<input type="radio" name="RadioGroup1" value="A"
id="RadioGroup1_0" />
A</label>
) <?php echo $row_qusnqz['A']; ?><br />
<br />
<label>
<input type="radio" name="RadioGroup1" value="B"
id="RadioGroup1_1" />
B</label>
) <?php echo $row_qusnqz['B']; ?><br />
<br />
<label>
<input type="radio" name="RadioGroup1" value="C"
id="RadioGroup1_2" />
C</label>
) <?php echo $row_qusnqz['C']; ?><br />
<br />
<label>
<input type="radio" name="RadioGroup1" value="D"
id="RadioGroup1_3" />
D</label>
) <?php echo $row_qusnqz['D']; ?><br />
<span class="radioRequiredMsg">Please make a selection.</span>
</span></td>
</tr>
<tr>
<td> </td>
</tr>
<tr>
<td align="center" valign="middle"><input name="Submit"
type="submit" class="styletxtfld" id="Submit" value="Submit" />
</td>
</tr>
<tr>
<td> </td>
</tr>
<tr align="center">
<td>
<?php if ($pageNum_qusnqz < $totalPages_qusnqz) { // Show if not last page
?>
<a href="<?php printf("%s?pageNum_qusnqz=%d%s", $currentPage, min(4,
$pageNum_qusnqz + 1), $queryString_qusnqz); ?>"
class="styletxtfld">Next </a>
<?php } // Show if not last page ?>
</td>
</tr>
<tr>
<td> </td>
</tr>
</table>
<input type="hidden" name="MM_insert" value="cprtc" />
</form>
<?php } while ($row_qusnqz = mysql_fetch_assoc($qusnqz)); ?>
<?php } // Show if recordset not empty ?>
</div>
</div>
<div id="Footer">
<h4>@Rituraj | <a href="AdminLogin.php" class="styletxtfld">Admin</a></h4>
</div>
</div>
<script type="text/javascript">
var spryradio1 = new Spry.Widget.ValidationRadio("spryradio1");
</script>
</body>
</html>
<?php
mysql_free_result($User);
mysql_free_result($qusnqz);
?>}
答案 0 :(得分：0)
您可以将用户问题位置存储在会话或数据库中，然后在回答问题时递增此值。
然后，您将检查用户问题位置并检索正确的问题，或者如果找不到位置，则返回第一个问题并将其问题位置设置为一个。
<?php
session_start();
if(!isset($_SESSION['user_question'])) $_SESSION['user_question'] = 1;
if(isset($_POST['next_question']) && $_POST['next_question']) {
$_SESSION['user_question'] ++;
// code to save question results in database
}
function get_next_question() {
// code to retreive the next question data
}
get_next_question();
?>