#27631 [Opn->Bgs]: dynamically generated form elements using name=foo[] submitted out of order

ID: 27631 Updated by: edink@php.net Reported By: phpclass at oneroad dot com -Status: Open +Status: Bogus Bug Type: Arrays related Operating System: Windows 2000 PHP Version: 4.3.4 New Comment: Depends on the browser used -- not a PHP bug. Previous Comments: ------------------------------------------------------------------------ [2004-03-17 22:03:52] phpclass at oneroad dot com Ah...I'm sorry. I should have tested just a little more before submitting the test case, and I should have talked about browsers. The test case reproduces only in Mozilla (I tested with 1.6). It does NOT reproduce with MSIE 6. And just to make matters more complicated, Opera 7.23 has a whole different problem (it doesn't show field1 at all). With three different browsers, there are three different outcomes. Given that, there's no clear way to determine whether the bug I've reported is the result of a browser issue, or a PHP issue. At first glance, it seems that each browser is submitting the http data in varying orders, and this is most likely something that PHP can't do anything about, but this conclusion would be better coming from someone with more knowledge of how this code works in PHP. ------------------------------------------------------------------------ [2004-03-17 21:45:28] phpclass at oneroad dot com Description: ------------ When submitting a form with elements named using an array (e.g.: name="foo[]"), the elements appear to be sent in the order in which the elements are created, and not the order in which they appear in the form's DOM tree. This can cause information to be sent in a mixed order when the elements are created in a different order using DOM routines. Reproduce code: --------------- See http://www.oneroad.com/test/phpbug.phtml to run the code, or http://www.oneroad.com/test/dombug.phps to view it (about 40 lines). (This server is running 4.0.6, but I have reproduced the bug in 4.3.4 as well.) To reproduce: (1) click "addrow" (2) choose "1" in the first field, and type "abc" in the second field (3) click "addrow" (4) choose "2" in the first field, and type "def" in the second field (5) change the first select field to "3". (6) enter "abc" in the second field of the first row. (7) click "go" Expected result: ---------------- The $_GET array should contain the following: Array ( [go] => go [field1] => Array ( [0] => 3 [1] => 2 ) [field2] => Array ( [0] => abc [1] => def ) ) Actual result: -------------- The $_GET array contained the following. Note the "field2" elements were sent in the reverse order, because the element in the first row was dynamically generated *after* the element in the second row. Array ( [go] => go [field1] => Array ( [0] => 3 [1] => 2 ) [field2] => Array ( [0] => def [1] => abc ) ) ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/?id=27631&edit=1