电子邮件表格不起作用，但有一次

Question

好的，我正在开发一个在线投资组合，而且我正在处理一个邮件表格。它会询问姓名，电子邮件和消息。然后当按下发送时，它会向我发送一封包含所有这些内容的电子邮件，并将用户重定向到另一个页面。然而它似乎在某处死亡。同时仍然将用户重定向到表单完整页面。

<form  method="post" name="contactform" action="<?php $_SERVER['PHP_SELF'] ?>">
    <input type="text" class="name" required maxlength="50" placeholder="Your name" name="name">
    <input type="text" class="email" required maxlength="50" placeholder="Your email" name="email">
    <textarea required maxlength="500" placeholder="Your message" name="message"></textarea><br><br>
    <input name="submit" type="submit" name="submit" value="submit">
</form>

这是PHP代码，我在文档的顶部，在？＆gt;之后的任何地方都没有空格。关闭

<?php
if(isset($_POST['submit']))
{
    $errors = '';
    $myemail = 'lucasvandongen10@gmail.com';//<-----Put Your email address here.
    if(empty($_POST['name'])  || 
       empty($_POST['email']) || 
       empty($_POST['message']))
    {
        $errors .= "\n Error: all fields are required";
    }
    else
    {
    }

    $name = $_POST['name']; 
    $email_address = $_POST['email']; 
    $message = $_POST['message']; 

    if (!preg_match("/^[_a-z0-9-]+(\.[_a-z0-9-]+)*@[a-z0-9-]+(\.[a-z0-9-]+)*(\.[a-z]{2,3})$/i", $email_address))
    {
        $errors .= "\n Error: Invalid email address";
    }
    else
    {
    }
    if( empty($errors))

    {

        $to = $myemail;
        $email_subject = "Contact form submission: $name";
        $email_body = "You have received a new message. "." Here are the details:\n Name: $name \n "."Email: $email_address\n Message: \n $message";
        $headers = "From: <noreply@lucasvandongen.com>\n";
        $headers .= "Reply-To: $email_address";
        mail($to,$email_subject,$email_body,$headers);
        //redirect to the 'thank you' page
        header('Location: contact-form-thank-you.html');
    }
    else
    {
    }
}
else
{
}
?>