generate a PDF using the Pdfcrowd API and send it as an email attachment (II.)

pdfmail2.php

<?php

require 'pdfcrowd.php';

try
{
    // generate a PDF file
    $client = new Pdfcrowd($username, $apikey);
    $pdf = $client->convertHtml("Hello World");

    //Deal with the email
    $to = 'recipient@example.com';
    $from = 'sender@example.com';
    $subject = 'a PDF file for you';
    $content = 'Please find the file attached';
    $attachment = chunk_split(base64_encode($pdf));
    $filename = "myfile.pdf";
    $boundary =md5(date('r', time()));
    $headers = "From: $from\r\nReply-To: $from";
    $headers .= "\r\nMIME-Version: 1.0\r\nContent-Type: multipart/mixed; boundary=\"_1_$boundary\"";
    $message="This is a multi-part message in MIME format.

--_1_$boundary
Content-Type: multipart/alternative; boundary=\"_2_$boundary\"

--_2_$boundary
Content-Type: text/plain; charset=\"iso-8859-1\"
Content-Transfer-Encoding: 7bit

$content

--_2_$boundary--
--_1_$boundary
Content-Type: application/pdf; name=\"$filename\"
Content-Transfer-Encoding: base64
Content-Disposition: attachment


$attachment
--_1_$boundary--";

    mail($to, $subject, $message, $headers);
}
catch(PdfcrowdException $e)
{
    echo "Pdfcrowd Error: " . $e->getMessage();
}
?>

Hello, I had the same probles as here.
http://pdfcrowd.com/forums/read.php?3,2112

please remove all whitespaces from end of lines

where is this file???? require 'pdfcrowd.php';