将sendmail重定向到页面而不是错误消息

Question

我已经尝试了很多变量并且已经在这里花了几个小时看我知道的东西会如此简单哈哈，但是我不能让它工作......我需要做的就是...当...表单已完成我将其重定向到页面而不是正常的错误消息。

感谢您的帮助。

<?php
//Retrieve form data. 
//GET - user submitted data using AJAX
//POST - in case user does not support javascript, we'll use POST instead
$name = ($_GET['name']) ? $_GET['name'] : $_POST['name'];
$phone = ($_GET['phone']) ? $_GET['phone'] : $_POST['phone'];
$email = ($_GET['email']) ?$_GET['email'] : $_POST['email'];
$comment = ($_GET['comment']) ?$_GET['comment'] : $_POST['comment'];

//flag to indicate which method it uses. If POST set it to 1

if ($_POST) $post=1;

//Simple server side validation for POST data, of course, you should validate the email
if (!$name) $errors[count($errors)] = 'Please enter your name.';
if (!$phone) $errors[count($errors)] = 'Please enter your contact number.';
if (!$email) $errors[count($errors)] = 'Please enter your email.'; 
if (!$comment) $errors[count($errors)] = 'Please enter your comment.'; 

//if the errors array is empty, send the mail
if (!$errors) {

    //recipient - replace your email here
    $to = 'me@myemail.com'; 
    //sender - from the form
    $from = $name . ' <' . $email . '>';

    //subject and the html message
    $subject = 'Message from ' . $name; 
    $message = 'Name: ' . $name . '<br/><br/>
                Phone: ' . $phone . '<br/><br/>
                Email: ' . $email . '<br/><br/>     
                Message: ' . nl2br($comment) . '<br/>';

    //send the mail
    $result = sendmail($to, $subject, $message, $from);

    //if POST was used, display the message straight away
    if ($_POST) {
        if ($result) 
            echo 'Thank you! We have received your message.';
        else 
            echo 'Sorry, unexpected error. Please try again later';

        //else if GET was used, return the boolean value so that 
            //ajax script can react accordingly
            //1 means success, 0 means failed
    } else {
        echo $result;   
    }

    //if the errors array has values
} else {
    //display the errors message
    for ($i=0; $i<count($errors); $i++) echo $errors[$i] . '<br/>';
    echo '<a href="index.html">Back</a>';
    exit;
}


//Simple mail function with HTML header
function sendmail($to, $subject, $message, $from) {
    $headers = "MIME-Version: 1.0" . "\r\n";
    $headers .= "Content-type:text/html;charset=iso-8859-1" . "\r\n";
    $headers .= 'From: ' . $from . "\r\n";

    $result = mail($to,$subject,$message,$headers);

    if ($result) 
        return 1;
    else 
        return 0;
}