Req->Bug #46745 [Opn]: Multipart/form-data field names truncated at semicolon in certain cases
Edit report at https://bugs.php.net/bug.php?id=46745&edit=1
ID: 46745
Updated by: cmb@php.net
Reported by: david at sickmiller dot com
Summary: Multipart/form-data field names truncated at
semicolon in certain cases
Status: Open
-Type: Feature/Change Request
+Type: Bug
Package: *General Issues
Operating System: Linux
PHP Version: 5.2.6
Block user comment: N
Private report: N
New Comment:
Regardless of whether this is a niche case: the described behavior
would be a bug.
Previous Comments:
------------------------------------------------------------------------
[2008-12-09 03:49:45] david at sickmiller dot com
For a web application, I have written a PHP file that is a general form handler. Various different
forms all post to this same file, which does a foreach through $_POST and essentially produces a
table with each field question and answer. Some of the forms include file uploads, so I have to use
multipart/form-data.
The forms are generated dynamically in a moderately expensive operation and result in HTML like
this:
<form>
What's your first name? <input name="What's your name?">
</form>
The questions actually come from different systems, so I don't have the flexibility to change
them to remove the non-alphanumeric characters. And it shouldn't be necessary according to the
HTML spec. It's generally been working, except for the peculiar combinations of apostophes,
quotation marks, and semicolons that I inadvertently ran into recently and have documented in this
bug. I checked the header, and it looks like Firefox is correctly submitting the data.
I realize this is a niche case. How difficult does the fix look?
------------------------------------------------------------------------
[2008-12-03 21:54:47] david at sickmiller dot com
Description:
------------
When a form is submitted using multipart-/form-data enctype, PHP will truncate field names if they
contain semicolons and certain other characters. It seems to happen when there is an uneven number
of quotation marks that precede the semicolon.
Reproduce code:
---------------
<html><form action="semicolon.php" method="POST"
enctype="multipart/form-data">
<input type="hidden" name="before ; after">
<input type="hidden" name="" before ; after">
<input type="hidden" name="' before ; after">
<input type="hidden" name="' ' before ; after">
<input type="hidden" name="' " before ;
after">
<input type="hidden" name="" ' before ;
after">
<input type="hidden" name="" " before ;
after">
<input type="hidden" name="" ' ' before ;
after">
<input type="hidden" name="" ' " before ;
after">
<input type="hidden" name="" " ' before ;
after">
<input type="hidden" name="" " " before
; after">
<input type="hidden" name="' ' ' before ;
after">
<input type="hidden" name="' ' " before ;
after">
<input type="hidden" name="' " ' before ;
after">
<input type="hidden" name="' " " before ;
after">
<input type="submit">
</form><pre><?php
print_r($_POST);
?></pre> </html>
Expected result:
----------------
Array
(
[before_;_after] =>
["_before_;_after] =>
['_before_;_after] =>
['_'_before_;_after] =>
['_"_before_;_after] =>
["_'_before_;_after] =>
["_"_before_;_after] =>
["_'_'_before_;_after] =>
["_'_"_before_;_after] =>
["_"_'_before_;_after] =>
["_"_"_before_;_after] =>
['_'_'_before_;_after] =>
['_'_"_before_;_after] =>
['_"_'_before_;_after] =>
['_"_"_before_;_after] =>
)
Actual result:
--------------
Array
(
[before_;_after] =>
["_before_] =>
['_before_;_after] =>
['_'_before_;_after] =>
['_"_before_] =>
["_'_before_;_after] =>
["_"_before_;_after] =>
["_'_'_before_] =>
["_'_"_before_;_after] =>
["_"_'_before_;_after] =>
["_"_"_before_] =>
['_'_'_before_;_after] =>
['_'_"_before_] =>
['_"_'_before_;_after] =>
['_"_"_before_;_after] =>
)
------------------------------------------------------------------------
--
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