#47752 [Tbd]: FILTER_VALIDATE_INT doesn't allow "+0" and "-0"
ID: 47752
Updated by: scottmac@php.net
Reported By: for-bugs at hnw dot jp
Status: To be documented
Bug Type: Filter related
Operating System: *
PHP Version: 5.2.9
New Comment:
The documentation should probably mention that +0 and -0 are valid
floats.
var_dump(filter_var("+0", FILTER_VALIDATE_FLOAT));
var_dump(filter_var("-0", FILTER_VALIDATE_FLOAT));
Previous Comments:
------------------------------------------------------------------------
[2009-03-24 15:22:37] pajoye@php.net
Make it a documentation bug instead, it should be documented and will
be, will add some other things while being at it :)
------------------------------------------------------------------------
[2009-03-24 15:15:17] pajoye@php.net
We have double checked again the design choices about -/+ 0, it was on
purpose. -0 or +0 are not valid integers.
Sorry, but we have to reject this request.
thanks for your understanding,
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[2009-03-24 15:03:53] peter at lvp-media dot com
Hereby a simple bug47752.phpt file. Tested it on a patched- an an
unpatched installation, results as expected. Strictly speaking +0 and -0
are valid integers, even though neither of them is positive or
negative.
Peter Beverloo
--TEST--
Bug #47752 (FILTER_VALIDATE_INT doesn't allow "+0" and "-0")
--FILE--
<?php
$positive = filter_var ('+0', FILTER_VALIDATE_INT);
$negative = filter_var ('-0', FILTER_VALIDATE_INT);
$zero = filter_var ('0', FILTER_VALIDATE_INT);
$octal = filter_var ('-0123', FILTER_VALIDATE_INT);
var_dump ($positive);
var_dump ($negative);
var_dump ($zero);
var_dump ($octal);
?>
--EXPECT--
int(0)
int(0)
int(0)
bool(false)
------------------------------------------------------------------------
[2009-03-24 12:44:19] pajoye@php.net
As far as I remember it is on purpose. 0 cannot be negative or
positive.
But if we agree on allowing them again, no problem here.
Can you please provide tests as well (phpt)?
------------------------------------------------------------------------
[2009-03-24 11:50:38] php at lvp-media dot com
False, this only allows +0 and -0 by checking the lenght of the string,
it verifies that the null is the only character in it.
------------------------------------------------------------------------
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the rest of the comments, please view the bug report online at
http://bugs.php.net/47752
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Thread (3 messages)