Problem:
我正在尝试为我的同学编写一个多项选择测验 - 主要是为了帮助我自己的学习 - 因此我正在使用 PHP (5.2.08) 和 MySQL (5.0.32) 创建一个基于 Web 的多项选择测验
问题表是：
+----------+--------------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra |
+----------+--------------+------+-----+---------+----------------+
| id | int(6) | NO | PRI | NULL | auto_increment |
| question | varchar(200) | NO | | NULL | |
| correct | varchar(80) | NO | | NULL | |
| wrong1 | varchar(80) | NO | | NULL | |
| wrong2 | varchar(80) | NO | | NULL | |
| wrong3 | varchar(80) | NO | | NULL | |
+----------+--------------+------+-----+---------+----------------+
一个问题的 print_r($questions) 输出示例：
Array
(
[0] => Array
(
[id] => 1
[question] => What is the correct pipeline pressure for Nitrous Oxide (<abbr title="Nitrous Oxide.">N<span class="chem-notation">2</span>O</abbr>)?
[answers] => Array
(
[0] => Array
(
[correct] => 1
[answer] => 60<abbr title="Pounds per square inch">PSI</abbr>.
)
[1] => Array
(
[correct] => 0
[answer] => 45<abbr title="Pounds per square inch">PSI</abbr>.
)
[2] => Array
(
[correct] => 0
[answer] => 30<abbr title="Pounds per square inch">PSI</abbr>.
)
[3] => Array
(
[correct] => 0
[answer] => 15<abbr title="Pounds per square inch">PSI</abbr>.
)
)
)
PHP 检索问题/答案并分配给变量：
$results = $results2 = mysql_query("
SELECT questions.id AS id,
questions.question AS q,
questions.correct AS c,
questions.wrong1 AS w1,
questions.wrong2 AS w2,
questions.wrong3 AS w3
FROM questions
ORDER BY questions.id
LIMIT 40")
or die("Oops, unable to access database at this time." . mysql_error());
while ($row = mysql_fetch_array($results)) {
if (!isset($i)) {
$i = 0;
}
else {
$i = $i;
}
$answers[$i] = array(
0=>array (correct => 1, answer => $row['c']),
1=>array (correct => 0, answer => $row['w1']),
2=>array (correct => 0, answer => $row['w2']),
3=>array (correct => 0, answer => $row['w3'])
);
$questions[$i] = array(id=>$row['id'],
question=>$row['q'],
answers=>$answers[$i]);
$correctAnswer[$i] = array($row['c']);
$i++;
}
显示问题/答案：
<?php
require_once 'incs/dbcnx.php';
require_once 'incs/questions.php';
echo "<?xml version=\"1.0\" encoding=\"utf-8\"?>"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>
<title>Multiple choice questions for ODP students.</title>
<link rel="stylesheet" type="text/css" href="css/stylesheet.css" />
</head>
<body>
<?php
$submitted = $_POST['submit'];
$quesions = $_SESSION['questions'];
$correctAnswers = $_SESSION['correctAnswer'];
if (isset($submitted) && $submitted == "1") {
// display the results.
echo "<form>";
for ($i=0;$i<sizeof($questions);$i++) {
echo "\t\t<fieldset>\n\n";
echo "\t\t<label>\n\t\t\t<span class=\"qNum\">Q" . $questions[$i][id] . ": </span>\n\t\t\t";
echo $questions[$i][question] . "\n\t\t</label>\n";
$submittedName = (string) "question" . $questions[$i][id];
for ($c=0;$c<sizeof($questions[$i][answers]);$c++) {
if ($_POST["$submittedName"] == $c) {
if ($questions[$c][answers][$c][correct] == 1) {
echo "\n\t\t<span class=\"correct\"><span class=\"hint\">✓</span>";
echo "<input checked type=\"radio\" name=\"question" . $questions[$i][id] . "\"";
echo " value=\"$c\" />";
}
else {
echo "\n\t\t<span class=\"submitted\"><span class=\"hint\">✗</span>";
echo "<input type=\"radio\" name=\"question" . $questions[$i][id] . "\"";
echo " value=\"$c\" />";
}
}
elseif ($questions[$c][answers][$c][correct] == 1) {
echo "\n\t\t<span class=\"thisOne\">";
echo "<input type=\"radio\" name=\"question" . $questions[$i][id] . "\"";
echo " value=\"$c\" />";
}
else {
echo "\n\t\t<span class=\"optionLine\">";
echo "<input disabled type=\"radio\" name=\"question" . $questions[$i][id] . "\"";
echo " value=\"$c\" />";
}
echo $questions[$i][answers][$c][answer] . "</span>";
}
echo "\n\n\t\t</fieldset>\n\n";
}
echo "</form>";
}
else {
// show the form
?>
<form enctype="form/multipart" action="<?php echo $_SERVER['PHP_SELF']; ?>" method="post">
<?php
for ($i=0;$i<sizeof($questions);$i++) {
echo "\t\t<fieldset>\n\n";
echo "\t\t<label>\n\t\t\t<span class=\"qNum\">Q" . $questions[$i][id] . ": </span>\n\t\t\t";
echo $questions[$i][question] . "\n\t\t</label>\n";
for ($c=0;$c<sizeof($questions[$i][answers]);$c++) {
echo "\n\t\t<span class=\"optionLine\">";
echo "<input type=\"radio\" name=\"question" . $questions[$i][id] . "\"";
echo " value=\"$c\" />";
echo $questions[$i][answers][$c][answer] . "</span>";
}
echo "\n\n\t\t</fieldset>\n\n";
}
?>
<fieldset>
<input type="reset" value="clear" />
<input type="submit" value="submit" />
<input type="hidden" name="submit" value="1" />
</fieldset>
</form>
<?php
}
?>
<div id="variables">
</div>
</body>
</html>
我想做的是重新排序答案并记住重新排序（使用-我认为-的值$questions[$i][answers][$c][correct]确定答案是 true ('1') 还是 false ('2')。但我想我在某个地方迷失了方向。如果有人能提供任何帮助和建议，我们将非常欢迎。
就像任何人都愿意将代码示例编辑到必要的程度一样（太多了，我只是不确定什么是必要的信息）。
Thanks!
