我有一个包含以下字段和示例的数据库表:
QuestionID
Question
AnswerA
AnswerB
AnswerC
AnswerD
CorrectAnswer
示例:
QuestionID: 1
Question: What is 2 + 2?
AnswerA: 1
AnswerB: 2
AnswerC: 3
AnswerD: 4
CorrectAnswer: 4
如果我的数据库有 20 个问题,我该如何获取它,以便问题不仅以随机顺序出现,而且答案出现在不同的单选按钮上(以防止用户记住正确答案的位置) 。这将被集成到 Facebook 应用程序中。下面是我的 SQL 查询:
$sql="SELECT DISTINCT Question, QuestionID, AnswerA, AnswerB, AnswerC, AnswerD FROM miniproj ORDER BY rand() LIMIT 1";
这是我正在使用的 while
语句(我知道 mysql_fetch_array
已弃用,但我可以再次排序):
while ($myrow = mysql_fetch_array($result))
{
$answers = array($myrow['AnswerA'], $myrow['AnswerB'], $myrow['AnswerC'], $myrow['AnswerD']);
shuffle($answers);
echo("<form action='question.php' method='POST'>\n");
echo("<h1>");
echo("Q: ");
echo($myrow['Question']);
echo("</h1>");
echo("<input type='radio' name='comments' value='A'>\n");
echo($myrow['AnswerA']);
echo("<p>");
echo("<input type='radio' name='comments' value='B'>\n");
echo($myrow['AnswerB']);
echo("<p>");
echo("<input type='radio' name='comments' value='C'>\n");
echo($myrow['AnswerC']);
echo("<p>");
echo("<input type='radio' name='comments' value='D'>\n");
echo($myrow['AnswerD']);
echo("<p>");
echo("<br />");
echo("<input type='submit' value='Submit'>\n");
echo("</form>\n");
}
任何提示都会很棒
最佳答案
您需要在 PHP 脚本的开头添加以下函数(感谢 Jon Stirling` s solution ):
<?php
function shuffle_keys(&$array){
$keys = array_keys($array);
shuffle($keys);
$result = array();
foreach($keys as $key){ $result[$key] = $array[$key]; }
$array = $result;
}
?>
然后,当您处理结果集时,我建议您这样做:
<?php
while($myrow = mysql_fetch_array($result))
{
$answers = array(
'A' => $myrow['AnswerA'],
'B' => $myrow['AnswerB'],
'C' => $myrow['AnswerC'],
'D' => $myrow['AnswerD']
);
shuffle_keys($answers);
echo "<form action='question.php' method='POST'>",
PHP_EOL,
"<h1>Q: {$myrow['Question']}</h1>";
foreach($answers as $key => $value){
echo "<p><input type='radio' name='comments' value='{$key}'>{$value}</p>";
}
echo "<input type='submit' value='Submit'>",
PHP_EOL,
"</form>",
PHP_EOL;
}
?>
附注: This topic建议您避免使用 ***mysql_**** 函数。它是旧的且已弃用的扩展。请使用 ***mysqli_**** 或 ***PDO_**** 代替。
关于php - 随机排列 MYSQL 数据库中的输出行项目,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/16103766/