我想使用存储在数据库表中的值创建一些在线测验。每个页面将显示10个问题,每个问题后面四个可能的答案......多维数组+ Foreach
What color are apples?
red
yellow
blue
pink
我知道如何做一个简单的阵列将显示所有的问题。或者我可以显示所有的答案。但将每组答案与适当的答案组合起来会更棘手。
有人建议我使用与foreach结合的多维数组。所以我开始检查一些相关的线索,其中包括@php PDO fetchAll() - while not working, foreach works,但我完全被雪覆盖了。
这是我想出迄今...
$Questions = array('question' => $Question, 'answers' => array($Answers));
foreach ($Questions as $Question => $Answers) {
echo $Questions.'<br />';
}
但它可能有更多的错误比我可以指望。这至少在正确的轨道上?
我在下面发布我的代码。
$stmt = $pdo->prepare("SELECT T.URL, TQ.URL, TQ.QID, TQ.Question, TQ.Feedback, TA.URL, TA.QID QID2, TA.Value, TA.Answer, TA.Correct
FROM g_tests T
LEFT JOIN g_test_questions TQ ON TQ.URL = T.URL
LEFT JOIN g_test_answers TA ON TA.URL = T.URL
WHERE T.URL = 'gw-intro-1' AND TQ.QID = TA.QID
ORDER BY TA.N");
$stmt->execute(array(
'MyURL'=>$MyURL
));
while ($row = $stmt->fetch()) {
$URL = $row['URL'];
$QID = $row['QID'];
$QID2 = $row['QID2'];
$Question = $row['Question'];
$Feedback = $row['Feedback'];
$Value = $row['Value'];
$Answer = $row['Answer'];
$Correct = $row['Correct'];
$Correct = str_replace('1', 'correct', $Correct);
$Correct = str_replace('2', 'wrong', $Correct);
$Questions = array('question' => $Question, 'answers' => array($Answers));
foreach ($Questions as $Question => $Answers) {
echo $Questions.'<br />';
}
}
我编辑这表明我修改后的代码:
$stmt = $pdo->prepare("SELECT T.Site, T.Type, T.URL, T.Section, T.URL_Foreign, T.Title, T.Subtitle, T.Parent, T.Live, TQ.URL, TQ.QID, TQ.Question, TQ.Feedback, TA.URL, TA.QID QID2, TA.Value, TA.Answer, TA.Correct
FROM g_tests T
LEFT JOIN g_test_questions TQ ON TQ.URL = T.URL
LEFT JOIN g_test_answers TA ON TA.URL = T.URL
WHERE T.URL = 'gw-intro-1' AND TQ.QID = TA.QID
ORDER BY TA.N");
$stmt->execute(array('MyURL' => $MyURL));
$Array = $stmt->fetchAll(PDO::FETCH_ASSOC);
foreach ($Array as $dataset){
foreach ($dataset as $Column => $Value){
echo "The column [$Column] contains [$Value] <br> \r\n";
}
}
我才发现,原来这个代码 - 回声$问题['问题']; - 在循环内插入多个回答每个问题。当在回路外回荡时,它只是回应一个问题。我还无法显示任何答案。 –