复选框测验多项选择

Question

我正在设置一个测验，可以为一个问题提供很多答案。复选框使用数组存储，并使用answers_bank列（存储正确答案的位置）对ab_name表进行检查。

我想要做的就是 - 如果检查的答案都在answers_bank表格中，那么它就会回复＆＃34;＆＃34;＃14;正确＆＃34;否则就会回复＆＃34; s＆＃34; s＆＃34;错误＆＃34; 34;对于不正确的复选框。

我尝试这样做的方式不起作用，因为它在每次迭代期间比较数组中的每个单独答案，并且对于其他答案返回不正确（因为它不相等）。这张图片应该解释我遇到的问题：

以下是我设置的代码片段：

返回复选框问题，如图片的第一部分所示：

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
}
?>

旨在检查答案是否正确

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>";
            }

        }
    }
}

}

我可以对此做出任何其他解决方案或更正吗？非常感谢！

Answer 1

首先存储所有正确的答案，这样您就不必遍历它们和表单中的响应。相反，您可以循环遍历表单响应并检查所选值是否在正确响应的数组中。

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>";
        }

    }
}