[英]Checkbox Quiz Multiple Choice
我正在准備一個測驗,對於一個問題可以有很多答案。 復選框使用數組存儲,並使用ab_name
列對照我的answers_bank
表進行檢查(存儲正確答案的位置)。
我只想做的是-如果已檢查的答案在Answers_bank表中,則回顯為“正確”,否則為不正確的復選框為回顯“不正確”。
我嘗試執行此操作的方法無效,因為它在每次迭代過程中比較數組中的每個答案,並為其他答案返回錯誤(因為它不相等)。 此圖像應解釋我遇到的問題:
這是我已設置的代碼的片段:
返回復選框問題,如圖像的第一部分所示:
foreach ($qresults as $aresults) {
$selected = $aresults["ab_name"];
$ab_id = $aresults["ab_id"];
?>
<input type="checkbox" name="checkbox[]"
value="<?php echo $aresults["ab_name"]; ?>"> <?php echo $aresults["ab_name"]; ?> <br>
<?php
}
?>
旨在檢查答案是否正確
foreach ($results as $row) {
$qb_id = $row['qb_id'];
$q_answer = $_POST["q$qb_id"];
$sql = "SELECT * FROM answers_bank WHERE ab_qb_id = :qb_id AND ab_correct = :correct";
$stmt = $db->prepare($sql);
$stmt->bindValue(':qb_id', $qb_id);
$stmt->bindValue(':correct', "correct");
$stmt->execute();
$qresults = $stmt->fetchAll();
foreach ($qresults as $cresults) {
if (is_array($q_answer)) {
foreach ($q_answer as $checkbox) {
if ($checkbox == $cresults["ab_name"]) {
echo "You said : " . $checkbox . " ... which is the correct answer!</br>";
} else if ($checkbox != $cresults["ab_name"]) {
echo "You said : " . $checkbox . " ... which is incorrect</br>";
}
}
}
}
}
我可以對此進行任何其他解決方案或更正嗎? 非常感謝!
首先存儲所有正確的答案,因此您不必遍歷所有答案和表單中的響應。 相反,您可以僅遍歷表單響應並檢查所選值是否在正確響應的數組中。
foreach ($results as $row) {
$qb_id = $row['qb_id'];
$q_answer = $_POST["q$qb_id"];
$sql = "SELECT * FROM answers_bank WHERE ab_qb_id = :qb_id AND ab_correct = :correct";
$stmt = $db->prepare($sql);
$stmt->bindValue(':qb_id', $qb_id);
$stmt->bindValue(':correct', "correct");
$stmt->execute();
$qresults = $stmt->fetchAll();
$correct_answers = array();
foreach ($qresults as $cresults) {
array_push($correct_answers, $cresults["ab_name"]);
}
if (is_array($q_answer)) {
foreach ($q_answer as $checkbox) {
if (in_array($checkbox, $correct_answers)) {
echo "You said : " . $checkbox . " ... which is the correct answer!</br>";
} else {
echo "You said : " . $checkbox . " ... which is incorrect</br>";
}
}
}
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