PHP中的联系表发送空白电子邮件

Question

提交表单时，我收到空白电子邮件或没有内容的电子邮件。

谢谢您的帮助。

我尝试了几次更改并多次更改了代码，但是找不到解决方法。

<?php
$name = $_POST['name'];
$email = $_POST['email'];
$message = $_POST['message'];
$from = 'From: Rafael'; 
$to = 'Do-Not-Reply@bestcheapaffordablewebhosting.com'; 
$subject = 'Support Message';

$body = "From: $name\n E-Mail: $email\n Message:\n $message";
?>

<?php
if ($_POST['submit']) {
if (mail ($to, $subject, $body, $from)) { 
echo '<p>Thank you! Your message has been sent. We will get back to you 
as soon as possible!</p>';
} else { 
    echo '<p>We are sorry, but something went wrong, go back and try 
again!</p>'; 
}
$email_from = filter_var($_POST['email'], FILTER_VALIDATE_EMAIL);
if ($email_from === false) {
echo 'error, invalid email';
}
}
?>
<form method="post" action="shared-website-hosting.php" class="bg-white 
rounded pb_form_v1">

          <h2 class="mb-4 mt-0 text-center">Contact Us</h2>

          <div class="form-group">
            <input name="name" class="form-control pb_height-50 reverse" 
placeholder="Name">
          </div>

          <div class="form-group">
            <input type="email" class="form-control pb_height-50 reverse" 
name="email" placeholder="Email">
          </div>

          <div class="form-group">
            <textarea name="message" class="form-control pb_height-50 
reverse" placeholder="Message"></textarea>
          </div>


          <div class="form-group">
            <input id="submit" name="submit" type="submit" value="Submit" 
class="btn btn-primary btn-lg btn-block pb_btn-pill  btn-shadow-blue">
          </div>
        </form>

我希望此联系表有效。谢谢您的帮助。