$destination = "http://yourdomain.com/yoururl";
 
$eol = "\r\n";
$data = '';
 
$mime_boundary=md5(time());
 
$data .= '--' . $mime_boundary . $eol;
$data .= 'Content-Disposition: form-data; name="somedata"' . $eol . $eol;
$data .= "Some Data" . $eol;
$data .= '--' . $mime_boundary . $eol;
$data .= 'Content-Disposition: form-data; name="somefile"; filename="filename.ext"' . $eol;
$data .= 'Content-Type: text/plain' . $eol;
$data .= 'Content-Transfer-Encoding: base64' . $eol . $eol;
$data .= chunk_split(base64_encode("Some file content")) . $eol;
$data .= "--" . $mime_boundary . "--" . $eol . $eol; // finish with two eol's!!
 
$params = array('http' => array(
                  'method' => 'POST',
                  'header' => 'Content-Type: multipart/form-data; boundary=' . $mime_boundary . $eol,
                  'content' => $data
               ))
 
$ctx = stream_context_create($params);
$response = @file_get_contents($destination, FILE_TEXT, $ctx);

3 Responses to “Posting multipart form data using PHP”

---

• Yoan

  2009-08-13 at 11:52

  Wasn’t he looking for a SOAP client that supports that lovely spec: http://www.w3.org/TR/SOAP-attachments and the offical SOAP implementation of PHP doesn’t support it: http://stackoverflow.com/questions/1122292/php-soap-client-that-understands-multi-part-messages

  He sits on the other side of the POST.

  It’s not a big deal to add this imho, http://developer.jelix.org/ticket/656#comment:1

  Cheers,

  P.S.: I’m sure you would enjoy using the <<< notation instead of doing so many repetitive concatenations.

  Reply
  • Claude

    2009-08-13 at 13:16

    I didn’t knew this heredoc notation, thanks for the hint :)

    Reply
• Andrew Glowik

  2010-02-22 at 01:37

  Thank you much for this exposition of code. I was at an impasse with PHP/curl using GlassFish/Quercus with a multipart/form-data post. Using your example to build my own form unwwedged me!

  Reply