我对 PHP 还很陌生。我有一个用户正在填写的表单，其中包含各种详细信息(开始日期、结束日期等)，名为purchaseLicence.php。提交后，表单操作会重新加载自身以使用 PHP 验证数据。
如果验证通过，我希望它使用 post 方法导航到purchaseLicence2.php，就像表单最初直接发布到purchaseLicence2.php一样。
我不介意使用 Javascript 来完成此操作，并且我猜想它需要参与，因为它最终会看到一种与它原本期望的形式不同的形式。
这是我当前的purchaseLicence.php，我遇到的问题是purchaseLicence2.php和purchaseLicence.php都是在表单发布后呈现的，并且浏览器仍然指向purchaseLicence.php，而不是purchaseLicence2.php .
<?php
include_once('php/strings.php');
include_once('php/sprocs.php');
include_once('php/dates.php');
$encounteredValidationError = false;
$navigateAway=false ;
if (isset($_POST['process']))
{
if ($_POST['process'] == 1)
{
// if here, form has been posted
$ProductCode = $_POST['ProductCode'];
$StartDate = $_POST['StartDate'];
$EndDate = $_POST['EndDateHidden'];
// standardise the date formats to ISO8601
$StartDate = date("Y-m-d", strtotime($StartDate));
$EndDate = date("Y-m-d", strtotime($EndDate));
echo "<descriptive>" . PHP_EOL;
echo "ProductCode:" . $ProductCode . "<br/>" . PHP_EOL;
echo "StartDate:" . $StartDate . "<br/>" . PHP_EOL;
echo "EndDate:" . $EndDate . "<br/>" . PHP_EOL;
echo "</descriptive>" . PHP_EOL;
// validation to happen here
if (!$encounteredValidationError)
{
// so we're happy with the values. The form has just reloaded, so we need to put these back from $_POST into the input fields, so
// that we can call NavigateToPurchaseLicence2(), which will get them out of the input fields and post them to purchaseLicence2.php
// What a faff!
$data = array('ProductCode'=>$ProductCode, 'StartDate'=>$StartDate, 'EndDate'=>$EndDate);
$options = array(
'http'=>array(
'header' => "Content-type: application/x-www-form-urlencoded\r\n",
'method' => 'POST',
'content' => http_build_query($data)
)
);
$context = stream_context_create($options);
$result = file_get_contents('purchaseLicence2.php', false, $context);
if ($result === FALSE) { /* Handle error */ }
var_dump($result);
}
else
{
// hilite errors in the form here, how? form is not yet loaded
}
}
}
?>
</head>
<body>
<form method="post" action="purchaseLicence.php" id="form1">
<input type="hidden" name="process" value="1">
<table border=0 width=800px align=left style="margin: 0px auto;">
<tr> <!-- Product > -->
<td style="vertical-align:top" width="500px" bgcolor="lightgray"><descriptive>Product</descriptive></td>
<td width="500px" bgcolor="lightgray">
<?php
// creates a dropdown of products
OutputSelectFromSQL("SELECT * FROM Product ORDER BY Description", "ProductCode", "ProductCode", "Description", "");
?>
</td>
</tr>
<tr> <!-- Licence Period -->
<td style="vertical-align:top" width="500px" bgcolor="lightgray"><descriptive>Licence Period</descriptive></td>
<td width="500px" bgcolor="lightgray"><descriptive>1 year</descriptive></td>
</tr>
<tr> <!-- Start Date -->
<td style="vertical-align:top" width="500px" bgcolor="lightgray"><descriptive>Start/End Dates</descriptive></td>
<td width="500px" bgcolor="lightgray">
<input type="date" style="font-family:verdana;font-size:12px;" name="StartDate" id="StartDate" onchange="updateEndDate(this.value);"></input>
<descriptive> to <a id="EndDate"></a></descriptive>
<input type="hidden" name="EndDateHidden" id="EndDateHidden"></input> <!-- this is used so we can post the end date to $_POST -->
</td>
</tr>
<tr> <!-- Next > -->
<td style="vertical-align:top" width="500px" bgcolor="lightgray"><descriptive></descriptive></td>
<td width="500px" bgcolor="lightgray" align="right"><input type="submit" value="Next"></input></td>
</tr>
</table>
</form>
</body>
一个遵循标准模式的简单示例非常有用。
最佳答案
我建议您使用 $_SESSION 来保存表单之间的状态，下面是一个非常粗略的示例，第一个表单上有 1 个字段，如果良好(数字)，则设置整个表单状态进入 session ，然后重定向到第二个表单以填写其他字段。非常简单，但您明白了。
dataentry1.php
<?php
session_start();
if ($_SERVER['REQUEST_METHOD'] == 'POST') {
// define form state
$form = [
'value' => $_POST,
'error' => []
];
// validate a_field
if (empty($form['value']['a_field'])) {
$form['error']['a_field'] = 'a_field is a required field!';
} elseif (!is_numeric($form['value']['a_field'])) {
$form['error']['a_field'] = 'a_field should be a number!';
}
// all good
if (empty($form['error'])) {
$_SESSION['form'] = $form;
exit(header('Location: dataentry2.php'));
}
}
?>
<?= (!empty($form['error']['global']) ? $form['error']['global'] : null) ?>
<form action="/dataentry1.php" method="post">
<lable>a_field:</lable>
<input type="text" name="a_field" value="<?= (isset($form['value']['a_field']) ? htmlentities($form['value']['a_field']) : null) ?>">
<?= (!empty($form['error']['a_field']) ? '<br>'.$form['error']['a_field'] : null) ?>
<br>
<input type="submit" value="Submit">
</form>
dataentry2.php - 需要填写之前的表格。
<?php
session_start();
// set form into scope from session
if (!empty($_SESSION['form'])) {
$form = $_SESSION['form'];
} else {
$_SESSION['form']['error']['global'] = 'You must fill out dataentry1 form first';
exit(header('Location: dataentry1.php'));
}
if ($_SERVER['REQUEST_METHOD'] == 'POST') {
// define form state
$form = [
'value' => array_merge($form['value'], $_POST),
'error' => []
];
// validate a_field
if (empty($form['value']['b_field'])) {
$form['error']['b_field'] = 'b_field is a required field!';
} elseif (!is_numeric($form['value']['b_field'])) {
$form['error']['b_field'] = 'b_field should be a number!';
}
// all good
if (empty($form['error'])) {
exit('Do something cool!');
}
}
?>
<form action="/dataentry2.php" method="post">
<lable>a_field:</lable>
<input type="text" name="a_field" value="<?= (isset($form['value']['a_field']) ? htmlentities($form['value']['a_field']) : null) ?>" readonly="readonly">
<?= (!empty($form['error']['a_field']) ? '<br>'.$form['error']['a_field'] : null) ?>
<lable>b_field:</lable>
<input type="text" name="b_field" value="<?= (isset($form['value']['b_field']) ? htmlentities($form['value']['b_field']) : null) ?>">
<?= (!empty($form['error']['b_field']) ? '<br>'.$form['error']['b_field'] : null) ?>
<br>
<input type="submit" value="Submit">
</form>
关于javascript - PHP 使用 post 以编程方式导航到新表单，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/48278113/