假設我有一個包含三種表單的 PHP 頁面。
- 形式一，它會在隱藏代碼時要求用戶輸入電子郵件地址。
<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">
- 第 1 步之后將顯示表格 2。在此步驟中，將要求用戶輸入第 1 步中的代碼（等于 42）。
<input type="number" id="code2" name="code2"> <input type="submit" value="Submit2">
- 表格三，將在步驟 2 中輸入正確的代碼后顯示。
<input type="number" id="code2" name="code2"> <input type="submit" value="Submit3">
我該如何編程？
uj5u.com熱心網友回復：
您可以嘗試這種方法：
<?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>
uj5u.com熱心網友回復：
您需要將表單的操作宣告為檔案的名稱。因此，如果您正在處理的檔案是名稱example.php，它應該如下所示：
$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>
<? } ?>
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標籤：javascript php html 形式