对于我的WordPress(v5.1.1(，我使用Bootstrap，并在Bootstrap Modal中使用以下HTML构建了一个自定义联系表单(遵循本教程：https://premium.wpmudev.org/blog/how-to-build-your-own-wordpress-contact-form-and-why/)。
<form id="contact-form" action="<?php echo get_site_url(); ?>" method="post">
<div class="modal-body">
<?php echo $response; ?>
<div class="form-group">
<input class="form-control my-2" type="text" name="message_name" size="50" placeholder="Your full name" value="<?php echo esc_attr($_POST['message_name']); ?>">
<input class="form-control my-2" type="email" name="message_email" size="50" placeholder="Email address" value="<?php echo esc_attr($_POST['message_email']); ?>">
<input class="form-control my-2" type="tel" name="message_tel" size="50" placeholder="Country code, Phone number" value="<?php echo esc_attr($_POST['message_tel']); ?>">
<textarea class="form-control my-2" name="message_text" rows="2" placeholder="Your message" value="<?php echo esc_attr($_POST['message_text']); ?>"></textarea>
<input class="form-control my-2" type="text" name="message_human" placeholder="Human check: Enter 2">
<input type="hidden" name="message_url" value="<?php the_permalink(); ?>">
<input type="hidden" name="message_page" value="<?php the_title(); ?>">
</div>
</div>
<div class="modal-footer">
<input type="hidden" name="submitted" value="1">
<button type="submit" value="Submit" class="btn btn-search form-control">Send Enquiry</button>
</div>
下面的函数用于验证Forms&在提交表单时显示响应：
function validateform() {
//response generation function
$response = "";
//function to generate response
function contact_g_form_response($type, $message) {
global $response;
if ($type == "success") {
$response = "<div class='message-success text-center'>{$message}</div>";
} else {
$response = "<div class='message-error text-center'>{$message}</div>";
}
}
//response messages
$not_human = "Enter current year in numbers.";
$missing_content = "Missing something.";
$email_invalid = "Check your Email address.";
$message_unsent = "Message was not sent. Try Again.";
$message_sent = "Thanks! We got your enquiry.";
//user posted variables
$name = $_POST['message_name'];
$email = $_POST['message_email'];
$fromEmail = $name . '<' . $email . '>';
$tel = $_POST['message_tel'];
$text = $_POST['message_text'];
$url = $_POST['message_url'];
$page = $_POST['message_page'];
$human = $_POST['message_human'];
//php mailer variables
$to = get_option('admin_email');
$subject = '[General Enquiry] ' . $name . ' | Phone Number:' . $tel;
$headers = 'From: ' . $fromEmail . "rn" .
'Reply-To: ' . $email . "rn";
$message = '<html><body><h1>New general enquiry from ' . $name . '!</h1>'
. '<p>Email: ' . $email . '</p>'
. '<p>Phone Number: ' . $tel . '</P>'
. '<p>Inquiry: ' . $text . '</P>'
. '<p>From page: <b>' . $page . '</b></P>'
. '<p>Page URL: ' . $url . '</p>'
. '</body></html>';
if (!$human == 0) {
if ($human != 2) {
contact_g_form_response("error", $not_human); //not human!
} else {
//validate email
if (!filter_var($email, FILTER_VALIDATE_EMAIL)) {
contact_g_form_response("error", $email_invalid);
} else { //email is valid
//validate presence of name, phone number
if (empty($name) || empty($tel)) {
contact_g_form_response("error", $missing_content);
} else { //ready to go!
$sent = wp_mail($to, $subject, $message, implode("rn", $headers)); //mail to admin - striptags removing formatting
// $sent2 = wp_mail($email, $subject, $body, $headers); //mail to visitor
// if ($sent || $sent2) {
if ($sent) {
contact_g_form_response("success", $message_sent); //message sent!
} else {
contact_g_form_response("error", $message_unsent); //message wasn't sent
}
}
}
}
} else if ($_POST['submitted']) {
contact_g_form_response("error", $missing_content);
}
}
在WordPress的早期版本中，电子邮件是在没有验证的情况下发送的，随着v5.1.1的升级，Modal在没有任何验证的情况下关闭，电子邮件也没有发送。
您只需要替换这个：
<form id="contact-form" action="<?php echo get_site_url();?>" method="post">
有了这个：
<form id="contact-form" method="post">
因为您在同一页面上显示错误，但单击提交按钮时，操作会将您带到特定的url，这就是验证未显示的原因。
这个：
if ($type == "success") {
$response = "<div class='message-success text-center'>{$message}</div>";
} else {
$response = "<div class='message-error text-center'>{$message}</div>";
}
还有：
if ($type == "success") {
$response = $message;
echo $response;
} else {
$response = $message;
echo $response;
}