Question

我是PHP的新手，正在努力完成这项工作。我早些时候发布了类似的问题，但是我遗漏了部分代码。我做了更多的工作，但仍然无法正常工作。用户选择调查后，将向他们提供10个问题的序列。他们必须选择一个答案（单选按钮），然后单击提交，将他们带到下一个问题。现在，用户可以浏览所有问题，在每个问题之后单击提交，而无需选择答案。我知道我需要验证是否已为每个问题选择答案（单选按钮）。我不明白我在做什么错。我已经阅读了数十篇解释验证的文章，但这项工作涉及很多部分。我不知道在哪里包括我的验证。帮助将不胜感激。我知道我只是想包括相关的尝试代码，但是现在我不确定代码的哪些部分对于呈现我的问题至关重要。如果我加入过多内容，我深表歉意。

$isPostBack = filter_input(INPUT_POST, 'submitButton') !== NULL;
if ($isPostBack) {
    // This is what happens if there is a postback.
    $choose_survey = filter_input(INPUT_POST, 'choose_survey', FILTER_VALIDATE_INT);



    if ($choose_survey !== NULL) {
        // Check the value of $choose_survey and then set 'survey' accordingly, e.g.
        if ($choose_survey == 0)
            $_SESSION['survey'] = $survey0;
        else if ($choose_survey == 1)
            $_SESSION['survey'] = $survey1;
        else if ($choose_survey == 2)
            $_SESSION['survey'] = $survey2;
        // A survey is selected so this is what happens.
        // these are the survey questions
       /* $_SESSION['survey'] = $survey0;*/
        // this will contain the answers
        $_SESSION['answers'] = array();
        // this is the question number
        $_SESSION['number'] = 1;
    } else {
        // A survey is not selected because it was already chosen.
        // get the value from the radio button.
        $answer = filter_input(INPUT_POST, 'answer', FILTER_DEFAULT);
        if ($answer !== NULL) {
           $_SESSION['answers'] = $answer;
        } else if ($answer == NULL) {
            echo '<p>Please selection an answer</p>';
        }

        // Stop user from submitting survey question that hasn't been answered


        $question_key = filter_input(INPUT_POST, 'question_key', FILTER_VALIDATE_FLOAT);
        // this will be used later to display the answers/results
        $_SESSION['answers'][$question_key] = $answer;
        // This is adding 1 to the question number.
        $_SESSION['number'] += 1;
        unset($_SESSION['survey'][$question_key]);
    }
} else 
   
?>

<!DOCTYPE html>
<html lang="en">
<body>

<form id="survey" name="survey" method="post" action="survey.php">
    <?php
    if (!isset($_SESSION['survey'])):
        echo '<p>Please choose a survey</p>';

        foreach ($surveys as $key => $value) {
            $surveyButton = <<<HEREDOC
    <label for = "$key">$value</label>
    <input type="radio" name="choose_survey" id="$key" value="$key"><br>
HEREDOC;
            echo $surveyButton;
        }
    else: ?>
        <div class="wrap">
            <p class="survey-header">Please respond to each survey statement</p>
            <?php
            $key = array_key_first($_SESSION['survey']);
            $value = $_SESSION['survey'][$key];
            $surveyQuestions = <<<HEREDOC
            <input type="hidden" name="question_key" value="$key">
    <label class="statement"> $value </label>
        <ul class='likert'>
            <li>
                <input type="radio" id="$key" name="answer" value="strong_agree">
                <label>Strongly agree</label>
            </li>
            <li>
                <input type="radio" id="$key" name="answer" value="agree">
                <label>Agree</label>
            </li>
            <li>
                <input type="radio" id="$key" name="answer" value="neutral">
                <label>Neutral</label>
            </li>
            <li>
                <input type="radio" id="$key" name="answer" value="disagree">
                <label>Disagree</label>
            </li>
            <li>
                <input type="radio" id="$key" name="answer" value="strong_disagree">
                <label>Strongly disagree</label>
            </li>
        </ul>
HEREDOC;

            echo $surveyQuestions;
            ?>
        </div>
    <?php endif; ?>
    <br/>
    <input type="submit" name="submitButton" value="Submit">
</form>
</body>
</html>

Answer 1

我认为您要比现在更难做。

 $answer = filter_input(INPUT_POST, 'answer', FILTER_DEFAULT);
    if ($answer !== NULL) {
       $_SESSION['answers'] = $answer;
    } else if ($answer == NULL) {
        echo '<p>Please selection an answer</p>';
    }

    // Stop user from submitting survey question that hasn't been answered


    $question_key = filter_input(INPUT_POST, 'question_key', FILTER_VALIDATE_FLOAT);
   // this will be used later to display the answers/results
   $_SESSION['answers'][$question_key] = $answer;
   // This is adding 1 to the question number.
   $_SESSION['number'] += 1;
   unset($_SESSION['survey'][$question_key]);

替换为

    $answer = filter_input(INPUT_POST, 'answer', FILTER_DEFAULT);
    if (!$answer) { //because your answers are truthy, no empty values like '0' 
       echo '<p>Please selection an answer</p>';
    }else{
       $_SESSION['answers'] = $answer;
       $question_key = filter_input(INPUT_POST, 'question_key', FILTER_VALIDATE_FLOAT);
       // this will be used later to display the answers/results
       $_SESSION['answers'][$question_key] = $answer;
       // This is adding 1 to the question number.
       $_SESSION['number'] += 1;
       unset($_SESSION['survey'][$question_key]);
    }

您已经知道它是否已回答，您只是没有正确构造代码。在您的代码中，该代码仅在条件之后继续，而在我的代码中，如果$answer我不为空，则仅执行该代码。

已选择“ PHP验证单选按钮/调查答案”

1 个答案: