File info is not POSTed when an onsubmit handler is present on the form

• Component: Forms
• Status: RESOLVED DUPLICATE

[Seth Fitzsimmons]

Adding a onsubmit handler to a multipart form with a file input causes the file to not be POSTed to the server.

[Seth Fitzsimmons]

Created attachment 7956 [details]
Upload form containing onsubmit

[Seth Fitzsimmons]

Created attachment 7957 [details]
PHP script demonstrating the absence of the "file" property

[Alexey Proskuryakov]

I have tried removing the onsubmit handler, and the output from the script didn't change ("Array ( [title] => sometitle )"). Furthermore, it's the same in Firefox.

Could you please clarify how to reproduce the problem?

[Seth Fitzsimmons]

Er, sorry.  I need to provide a better reduction.

[Seth Fitzsimmons]

Created attachment 7960 [details]
Better diagnostic script

[Alexey Proskuryakov]

The updated script works as expected for me (i.e., I cannot reproduce the bug):

Request:
Array
(
    [title] => sometitle
)

Files:
Array
(
    [file] => Array
        (
            [name] => onsubmit.php
            [type] => text/php
            [tmp_name] => /var/tmp/php7ISaZd
            [error] => 0
            [size] => 124
        )

)

I'm using Mac OS X 10.4.5 with Apache, accessing it locally.

[Seth Fitzsimmons]

That's correct; I need to track down the problem more fully when I have some more time; in the meantime I figured I should make the diagnostic script clear that it _is_ working this way.

[Seth Fitzsimmons]

Created attachment 7966 [details]
Upload form containing onsubmit

[Seth Fitzsimmons]

Upon further investigation, this only happens if the form being submitted has its visibility set to "none" (demonstrated in attachment 7966 [details]).

[Alexey Proskuryakov]

Yes, display:none file input controls are a known bug... Judging form the comments there, WebKit may be not violating the standard, but it is clearly in disagreement with other browsers.

*** This bug has been marked as a duplicate of 5196 ***