Enviar Email Com Anexo: File Chega Em Branco

pessoal o problema é o seguinte:

uso esse script para enviar email com anexo diretamente pro meu email,

a mensagem, subject, o email da pessoa e o anexo chegam direitinho, mas o arquivo em anexo sempre chega em branco, alguem poderia dar uma ajuda? abraços...

<?php

$aposenviar='http://www.paginaquevemdepois.com/ok.html';

 

if ($filea)

{

function mail_attachment ($to, $nome, $nome1, $subject, $message, $attachment){

$fileatt = $attachment; // Path to the file

$fileatt_type = "txt/doc"; // File Type

$start= strrpos($attachment, '/') == -1 ? strrpos($attachment, '//') : strrpos($attachment, '/')+1;

$fileatt_name = substr($attachment, $start, strlen($attachment)); // Filename that will be used for the file as the attachment

$email_from = $nome; // Who the email is from

$emailcli = $nome1; // Who the email is from

$subject = "pedido";

$email_subject = $subject; // The Subject of the email

$email_txt = $message; // Message that the email has in it

$email_to = $to; // Who the email is to

$headers = "From: ".$nome;

 

 

$msg_txt=" <table><tr><td>$nome</td></tr> <tr><td>$nome1</td></tr> <tr><td>$subject</td></tr><tr><td> $message</td></tr></table>";

$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_txt .= $msg_txt;

$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_txt . "\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 . "\y\y" .

"--{$mime_boundary}--\n";

 

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

 

if($ok)

{

echo "<script>window.location='$aposenviar'</script>";

 

}

else

{

die("Sorry but the email could not be sent. Please go back and try again!");

}

}

 

 

mail_attachment("meuemail@hotmail.com", "$nome", "$nome1", "$subject", "$message", ("temp/".$_FILES["filea"]["name"]));

}

?>