รบกวนถามเรื่อง การส่ง email ที่สามารถ attach file ได้ด้วย

<?php
if((isset($_POST['submit']))&& $_FILES['attach']['size'] > 0)
{
$fileatt = $_FILES['attach']; // Path to the file
$fileatt_type = "application/octet-stream"; // File Type
$fileatt_name = "test"; // Filename that will be used for the file as the attachment
$fileatt_name = $_FILES['attach']['name'];
$fileatt_type = $_FILES['attach']['type'];
$filesize = $_FILES['attach']['size'];
$tmp_filename = $_FILES['attach']['tmp_name'];

$email_from = $POST['from']; // Who the email is from
$email_subject = "test"; // The Subject of the email
$email_txt = "test"; // Message that the email has in it

$email_to = $_POST['to']; // Who the email is to

$headers = "From: ".$email_from;

$file = fopen($fileatt,'rb');
$data = fread($file,filesize($fileatt));
fclose($file);

$semi_rand = md5(time());
$mime_boundary = "==Multipart_Boundary_x{$semi_rand}x";

$headers .= "\nMIME-Version: 1.0\n" .
"Content-Type: multipart/mixed;\n" .
" boundary=\"{$mime_boundary}\"";

$email_message .= "This is a multi-part message in MIME format.\n\n" .
"--{$mime_boundary}\n" .
"Content-Type:text/html; charset=\"iso-8859-1\"\n" .
"Content-Transfer-Encoding: 7bit\n\n" .
$email_message . "\n\n";

$data = chunk_split(base64_encode($data));

$email_message .= "--{$mime_boundary}\n" .
"Content-Type: {$fileatt_type};\n" .
" name=\"{$fileatt_name}\"\n" .
//"Content-Disposition: attachment;\n" .
//" filename=\"{$fileatt_name}\"\n" .
"Content-Transfer-Encoding: base64\n\n" .
$data . "\n\n" .
"--{$mime_boundary}--\n";

$ok = @mail($email_to, $email_subject, $email_message, $headers);

if($ok) {
//echo $fileatt;
echo "<font face=verdana size=2>The file was successfully sent!</font>";
} else {
die("Sorry but the email could not be sent. Please go back and try again!");
}
}
?>
<form enctype="multipart/form-data" action="attachment.php" method="POST">
<input type="hidden" name="MAX_FILE_SIZE" value="100000" />
Choose a file to upload: <input name="attach" type="file" /><br />
TO :<input name="to" type="text" id="to"/><br />
FROM :<input name="from" type="text" id="from"/><br />
<input type="submit" name="submit"value="attach File" />
</form>Code (PHP)