创建使用 for 循环在多个数组中循环的代码逻辑

Question

我正在尝试通过使用for 循环而不是多个if 语句来创建代码逻辑。

这是我之前使用的if语句代码：

if (isset($_POST['answer1']))
{
    if ($_POST['answer1'] === '1d')
    {
        print $correct[0];
    }
    elseif ($_POST['answer1'] === '1b')
    {
        print $incorrect[0];
    }
    elseif ($_POST['answer1'] ==='1c')
    {
        print $incorrect[0];
    }
    elseif ($_POST['answer1'] === '1a')
    {
        print $incorrect[0];
    }
};

此代码允许我检查答案并打印$correct 或$incorrect 变量。我在这段代码中的问题是它非常低效，因为我最终不得不创建十个左右 if 语句。

我想出了一个 for 循环代码的模型来说明：

$_SESSION["totalCorrect"] = 0;

if (!isset($_SESSION["totalCorrect"]))
{
    $_SESSION["totalCorrect"] = 0;
}
else 
{
    $totalCorrect = $_SESSION["totalCorrect"];
}

$postAns = array($_POST['answer1'] as $ans1, $_POST['answer2'] as $ans2, $_POST['answer3'] as $ans3, $_POST['answer4'] as $ans4, $_POST['answer5'] as $ans5, $_POST['answer6'] as $ans6, 
$_POST['answer7'] as $ans7, $_POST['answer8'] as $ans8, $_POST['answer9'] as $ans9, $_POST['answer10'] as $ans10);

for ($i = 0; $i < count($postAns); i++)
{
    if ($i == $postAns[])
    {
        if ($postAns[] === 'answer')
        {
            print $correct[];
            $_SESSION["totalCorrect"]++;
        }
        else ()
        {
            print $incorrect[];
        }
    }
};

对于此代码，我尝试循环遍历三个数组，$postAns、$correct 和 $incorrect。 $correct 和 $incorrect 数组在调用时会根据它们是否得到正确的答案打印出文本。

所以对于for 循环，我希望能够循环遍历$postAns 数组的每个值，以检查它是哪个答案编号以及它是否是正确答案。如果它是正确的，那么代码循环通过$correct 以获得该答案编号的正确文本并增加totalCorrect 的值，该变量存储了多少用户正确。如果不正确，代码将循环通过 $incorrect 以获取该答案编号的正确文本。

总的来说，我对循环并不是很精通，因此我们将不胜感激任何见解/帮助。

编辑：包括表单提交代码

<form action="staff_info.php" method="get" id="q1">
<fieldset>
<legend>Question 1</legend>
<input type="radio" name="answer1" value="1a" id="1a"><label for="1a">  A.  </label>
<input type="radio" name="answer1" value="1b" id="1b"><label for="1b">  B.  </label>
<input type="radio" name="answer1" value="1c" id="1c"><label for="1c">  C.  </label>
<input type="radio" name="answer1" value="1d" id="1d"><label for="1d">  D.  </label>
<input type="button" id="answer" class="button " title="abutton" value="ANSWER">
<a href="staff_q2.php" class="button " title="nbutton" style="float:right;" id="next">NEXT</a>
</fieldset>

Answer 1

您在伪代码中缺少的一件事是实际答案。如果您按照@fefe 的指示创建正确答案的数组，那么循环将是这样的：

$correctAnswers = array(
    'answer1'=>'1d', 
    'answer2' => '2b', 
    'answer3' => '3c', 
    'answer4' => '4b', 
    'answer5' => '5a'
);

$numberCorrect = 0;
$responseIndex = 0;

foreach ($correctAnswers as $key=>$answer) {
    if ($_POST[$key] === $answer) {
        $numberCorrect++;
        print $correct[$responseIndex];
    }
    else {
        print $incorrect[$responseIndex];
    }

    $responseIndex++;
}

Answer 2

我真的不知道你想要实现什么，但循环应该看起来像这样，你可以使用if 或switch case 进行一些验证。

$postAns = array(
    'answer1'=>'ans1', 
    'answer2' => 'ans2', 
    'answer3' => 'ans3', 
    'answer4' => 'ans4', 
    'answer5' => 'ans5', 
    'answer6' => 'ans6', 
    'answer7' => 'ans7', 
    'answer8' => 'ans8', 
    'answer9' => 'ans9', 
    'answer10' => 'ans9'
);


foreach ($postAns as $key=>$ans) {
    var_dump($ans);
}