选择题选择题

Question

我正在准备一个小测验，它可以对一个问题有很多答案。复选框使用数组存储，并通过ab_name列对我的ab_name表进行检查(其中存储正确的答案)。

我所要做的就是--如果选中的答案在answers_bank表中，它会回显它的“正确”，否则它会对不正确的复选框回显“不正确”。

我尝试过的方法不起作用，因为它在每次迭代期间比较数组中的每个单独的答案，并返回不正确的其他答案(因为它是不相等的)。这张照片应该能解释我的问题：

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下面是我设置的代码片段：

返回复选框问题，如图像的第一部分所示：

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
}
?>

的目的是检查答案是否正确，

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>";
            }

        }
    }
}

}

对此我还能做什么其他的解决方案或修正吗？非常感谢!

Answer 1

首先存储所有正确的答案，这样您就不必同时遍历它们和表单的响应。相反，您只需循环表单响应，并检查所选值是否位于正确响应数组中。

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>";
        }

    }
}