php表单的多个单选按钮数组

Question

我是新手。我正在研究 Web 开发，并且必须为问卷创建一个 php 响应表单，然后将其输入到数据库中。我在使用单选按钮时遇到问题。我无法创建正确的代码来创建一个数组并在响应表单/页面中显示答案。

这是我的代码：

<form name="modulequestionnaire" method="post" action="tania.responseform.php" />

<p><i>Rate each question from 6 to 1, six being strongly 
agree and one being strongly disagree.</i></p>

1. I think the module guide/student handbook provided enough information about the 
module content, organisation and assessment.<br/>

6<input type="radio" name="answer[1]" value="6"> 5<input type="radio" name="answer[1]" value="5"> 
4<input type="radio" name="answer[1]" value="4"> 3<input type="radio" name="answer[1]" value="3"> 
2<input type="radio" name="answer[1]" value="2"> 1<input type="radio" name="answer[1]" value="1">
</p>

2.The module was well organised.<br/>

6<input type="radio" name="answer[2]" value="6"> 5<input type="radio" name="answer[2]" value="5"> 
4<input type="radio" name="answer[2]" value="4"> 3<input type="radio" name="answer[2]" value="3"> 
2<input type="radio" name="answer[2]" value="2"> 1<input type="radio" name="answer[2]" value="1"> 
</p>

3.The Learning Resource Centre provided adequate materials for the module.<br/>

6<input type="radio" name="answer[3]" value="6"> 5<input type="radio" name="answer[3]" value="5"> 
4<input type="radio" name="answer[3]" value="4"> 3<input type="radio" name="answer[3]" value="3"> 
2<input type="radio" name="answer[3]" value="2"> 1<input type="radio" name="answer[3]" value="1"> 
</p>

我知道答案可能与 isset 函数有关，但我不知道如何编写代码。 有人可以在这里教我或帮助我吗？

Answer 1

当您不确定如何处理已设置的 HTML 标记时，您应该 var_dump($_POST) 发送到 PHP 处理程序页面的值，这样您就知道格式会是什么样子，这样您可以从那里继续。

当我创建您的 HTML 并使用 var_dump 和一些随机选择对其进行测试时，输出是

array(2) { ["answer"]=> array(3) { [1]=> string(1) "5" [2]=> string(1) "3" [3]=> string(1) "4" } ["submit"]=> string(6) "Submit" }

注意$_POST['answer'] 变量中有一个数组。所以你应该 foreach 在该数组中的每个元素上处理每个相应的值：

foreach ($_POST['answer'] as $answer) {
    // do stuff with the answer
}

如果您需要使用您在POST 数组中定义的答案编号，您可以使用密钥foreach：

foreach ($_POST['answer'] as $answerNum => $answer) {
    // do stuff with $answerNum and $answer
}

当然，您可以通过号码直接访问您的答案：

if (!empty($_POST['answer'][1])) { // To ensure that the value is being sent
    // do stuff with $_POST['answer'][1]
}

Answer 2

我不认为这正是您想要做的。相反，如果您给这三个问题起不同的名称：

<form name="modulequestionnaire" method="post" action="tania.responseform.php" />

<p><i>Rate each question from 6 to 1, six being strongly 
agree and one being strongly disagree.</i></p>

1. I think the module guide/student handbook provided enough information about the 
module content, organisation and assessment.<br/>

6<input type="radio" name="answer1" value="6"> 5<input type="radio" name="answer1" value="5"> 
4<input type="radio" name="answer1" value="4"> 3<input type="radio" name="answer1" value="3"> 
2<input type="radio" name="answer1" value="2"> 1<input type="radio" name="answer1" value="1">
</p>

2.The module was well organised.<br/>

6<input type="radio" name="answer2" value="6"> 5<input type="radio" name="answer2" value="5">



4<input type="radio" name="answer2" value="4"> 3<input type="radio" name="answer2" value="3"> 
2<input type="radio" name="answer2" value="2"> 1<input type="radio" name="answer2" value="1"> 
</p>

3.The Learning Resource Centre provided adequate materials for the module.<br/>

6<input type="radio" name="answer3" value="6"> 5<input type="radio" name="answer3" value="5"> 
4<input type="radio" name="answer3" value="4"> 3<input type="radio" name="answer3" value="3"> 
2<input type="radio" name="answer3" value="2"> 1<input type="radio" name="answer3" value="1"> 
</p>

然后在 php 中，您需要做的就是使用 $_POST 变量来查找值

<?php 
    echo $_POST['answer1'];
    echo $_POST['answer2'];
    echo $_POST['answer3'];
?>