(PECL pecl_http >= 0.10.0)
HttpRequest::addPostFile — Add post file
Add a file to the POST request, leaving previously set files unchanged.
Affects only POST and custom requests. Cannot be used with raw post data.
the form element name
the path to the file
the content type of the file
Returns TRUE on success, or FALSE if the content type seems not to contain a primary and a secondary content type part.