(PECL pecl_http >= 0.10.0)
HttpRequest::setPostFiles — Set post files
Set files to post, overwriting previously set post files.
Affects only POST and requests. Cannot be used with raw post data.
an array containing the files to post; if empty, the post files will be unset
성공할 경우 TRUE를, 실패할 경우 FALSE를 반환합니다.