一个php页面中有三个表单操作

Question

假设我有一个PHP页面，它有三个表单。

1. 表单一，它将要求用户在代码隐藏时输入电子邮件地址

<label for="email">Email Address:</label> <input type="text" id="email" name="email">
<input type="hidden" id="code" name="code" value="42"> <input type="submit" value="Submit1">

2. 表格二将在步骤1之后显示。在此步骤中，用户将被要求输入步骤1中的代码(等于42(

<input type="number" id="code2" name="code2"> <input type="submit" value="Submit2">

3. 表格三，将在步骤2中输入更正代码后显示

<input type="number" id="code2" name="code2"> <input type="submit" value="Submit3">

如何对其进行编程？

Answer 1

您可以尝试这种方法：

<?php 
function getFormContent() {
$email = $_POST['email'] ?? null; //$email equals to null if it is undefined, to prevent errors
if (!$email) {
echo '<input type="text" name="email" placeholder="Email.." />';
echo '<input type="hidden" id="code" name="code" value="42">';
} else {
echo '<input type="hidden" name="email" value="'.$email.'" />'; //keep email set after submitting first step
}
if ($email && $_POST['code']) {
if (isset($_POST['code2']) && $_POST['code2'] == $_POST['code']) {
//final form
} 
else { //second step
echo '<input type="number" id="code2" name="code2">';
echo '<input type="hidden" id="code" name="code" value="42">'; //we still need this in case user submitted a wrong code
}
}
}
?>
<form method="post">
<?= getFormContent() ?>
<input type="submit" />
</form>

Answer 2

您需要将表单的操作声明为文件名。所以，如果你正在处理的文件名为example.php，它应该是这样的：

$email = trim(get_variable_value('email'));
$code = trim(get_variable_value('code'));
$code2 = trim(get_variable_value('code2'));
//make sure to validate the input!! if it's not valid send back
<? if(!isset($email)){ //alternatively, you can add a hidden input `stage`. I just don't like it, as it can be bypassed.
?>
<form name="transferToNewForm" action="example.php" method="post">
<label for="email">Email Address:</label> <input type="text" id="email" name="email">
<input type="hidden" id="code" name="code" value="42">
<input type="submit" value="Submit1">
</form>
<? } 
if(isset($email) && isset($code) && $code == 42){ ?>
<form name="transferToNewerForm" action="example.php" method="post">
<label for="email">Email Address:</label> <input type="text" id="email" name="email" value="<?= $email ?>" readonly>
<input type="number" id="code2" name="code2">
<input type="submit" value="Submit2">
</form>
<? } 
if(isset($email) && isset($code2) && $code2 == 42){ ?>
<form name="finalFrom" action="theActualPageYouWant.php" method="post">
<label for="email">Email Address:</label> <input type="text" id="email" name="email" value="<?= $email ?>" readonly>
<input type="number" id="code2" name="code2">
<input type="submit" value="Submit3">
</form>
<? } ?>