Добавить прикрепление файла к форме обратной связи

<?php
 
/* config start */
 
$emailAddress = '???@???.ru';
 
/* config end */
 
 
require "phpmailer/class.phpmailer.php";
 
session_name("fancyform");
session_start();
 
 
foreach($_POST as $k=>$v)
{
    if(ini_get('magic_quotes_gpc'))
    $_POST[$k]=stripslashes($_POST[$k]);
    
    $_POST[$k]=htmlspecialchars(strip_tags($_POST[$k]));
}
 
 
$err = array();
 
if(!checkLen('name'))
    $err[]='The name field is too short or empty!';
 
if(!checkLen('email'))
    $err[]='The email field is too short or empty!';
else if(!checkEmail($_POST['email']))
    $err[]='Your email is not valid!';
 
if(!checkLen('subject'))
    $err[]='You have not selected a subject!';
 
if(!checkLen('message'))
    $err[]='The message field is too short or empty!';
 
if((int)$_POST['captcha'] != $_SESSION['expect'])
    $err[]='The captcha code is wrong!';
 
 
if(count($err))
{
    if($_POST['ajax'])
    {
        echo '-1';
    }
 
    else if($_SERVER['HTTP_REFERER'])
    {
        $_SESSION['errStr'] = implode('<br />',$err);
        $_SESSION['post']=$_POST;
        
        header('Location: '.$_SERVER['HTTP_REFERER']);
    }
 
    exit;
}
 
 
$msg=
'Name:  '.$_POST['name'].'<br />
Email:  '.$_POST['email'].'<br />
IP: '.$_SERVER['REMOTE_ADDR'].'<br /><br />
 
Message:<br /><br />
 
'.nl2br($_POST['message']).'
 
';
 
 
$mail = new PHPMailer();
$mail->IsMail();
 
$mail->AddReplyTo($_POST['email'], $_POST['name']);
$mail->AddAddress($emailAddress);
$mail->SetFrom($_POST['email'], $_POST['name']);
$mail->Subject = "A new ".mb_strtolower($_POST['subject'])." from ".$_POST['name']." | contact form feedback";
 
$mail->MsgHTML($msg);
 
$mail->Send();
 
 
unset($_SESSION['post']);
 
if($_POST['ajax'])
{
    echo '1';
}
else
{
    $_SESSION['sent']=1;
    
    if($_SERVER['HTTP_REFERER'])
        header('Location: '.$_SERVER['HTTP_REFERER']);
    
    exit;
}
 
function checkLen($str,$len=2)
{
    return isset($_POST[$str]) && mb_strlen(strip_tags($_POST[$str]),"utf-8") > $len;
}
 
function checkEmail($str)
{
    return preg_match("/^[\.A-z0-9_\-\+]+[@][A-z0-9_\-]+([.][A-z0-9_\-]+)+[A-z]{1,4}$/", $str);
}
 
?>