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Request #42608 Example #660 (filter_input_array) is wrong
Submitted: 2007-09-10 11:04 UTC Modified: 2012-02-22 13:29 UTC
Avg. Score:4.3 ± 1.0
Reproduced:17 of 18 (94.4%)
Same Version:7 (41.2%)
Same OS:7 (41.2%)
From: phpbugs dot 20 dot zsh at spamgourmet dot com Assigned:
Status: Open Package: Filter related
PHP Version: 5.2.4 OS: Irrelevant
Private report: No CVE-ID: None
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 [2007-09-10 11:04 UTC] phpbugs dot 20 dot zsh at spamgourmet dot com
The example will not output the array shown below the example code -- any undefined variable will cause filter_input_array() to return (so the output would be "NULL").

You'll notice I've classified this as a change request rather than a documentation problem, for the expected (and described ("Return Values")) behavior in example #660 makes WAY more sense.

Reproduce code:


consistent_filter_input_array (last revision 2012-02-27 14:38 UTC) by

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 [2009-10-08 03:02 UTC] ChadFulton at gmail dot com
Although this is a very old bug, it seems to me that the poster is 
incorrect; I suspect the problem is that the poster attempted to set the 
$_POST array during runtime (e.g. $_POST = array( ... ); ), and 
filter_input_array does not allow runtime modification $_POST, $_GET, 
 [2011-02-21 20:59 UTC]
-Package: Feature/Change Request +Package: Filter related
 [2012-02-22 13:29 UTC]
Fast forward to 2012, this is still wrong IMHO

Possible bugs:
1) documentation problem; the return value is defined as an array or false in case of failure - when the respective INPUT_XXX is not populated, it returns null; clearly not expected according to the documentation.
2) wrong behaviour in the code; if INPUT_XXX is not populated, I would expect the return value to be this: array_fill_keys(array_keys($definition), null)
 [2012-02-27 14:38 UTC]
The following patch has been added/updated:

Patch Name: consistent_filter_input_array
Revision:   1330353526
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