In addition to the usual variables imported from POST and GET forms, Vortex also imports variables from a form-based multi-part file upload, if the user's browser supports them. This provides an easy way to upload binary files in a form. For example, we can upload a GIF with the following form:

  <FORM METHOD=post ACTION="$url/func.html"
       ENCTYPE="multipart/form-data">
    File to upload: <INPUT TYPE=file NAME=image ACCEPT="image/gif">
    <BR>Description: <INPUT TYPE=text NAME=desc>
    <INPUT TYPE=submit VALUE="Submit">
  </FORM>

This form would present the user with a file-select dialog box (for the $image variable) and a plain text box (for the $desc variable). On submission, the browser sends the file the user selected, and the Vortex variable $image would contain the contents of that file - a GIF image if the user selected one. Any other type variables on the form (eg. $desc ) are imported as usual.

To the user this form would look like this: