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Groups > comp.lang.php > #9359
| Message-ID | <1934679.jXLOkI38UW@PointedEars.de> (permalink) |
|---|---|
| From | Thomas 'PointedEars' Lahn <PointedEars@web.de> |
| Organization | PointedEars Software (PES) |
| Date | 2013-05-15 20:49 +0200 |
| Subject | Re: bug in is_numeric |
| Newsgroups | comp.lang.php |
| References | (8 earlier) <kmup14$3cp$2@dont-email.me> <kmutiq$ld3$1@dont-email.me> <kmvlet$o6o$1@dont-email.me> <9869380.OEKH2unXeN@PointedEars.de> <kn0jok$ebm$1@speranza.aioe.org> |
Christoph Becker wrote:
> Thomas 'PointedEars' Lahn wrote:
>> SwissCheese wrote:
>>> norman@amd64x2:~$ php -a
>>> Interactive shell
>>>
>>> php > $a = 'x';
>>> php > if(is_numeric($a)) { echo 'okay'; } else { echo 'not okay'; }
>>> not okay
>>> php > $a = '11';
>>> php > if(is_numeric($a)) { echo 'okay'; } else { echo 'not okay'; }
>>> okay
>>> php > $a = 'x11.11c';
>>> php > if(is_numeric($a)) { echo 'okay'; } else { echo 'not okay'; }
>>> not okay
>>> php > $a = '0x1111c';
>>> php > if(is_numeric($a)) { echo 'okay'; } else { echo 'not okay'; }
>>> okay
>>>
>>> As per http://us3.php.net/manual/en/function.is-numeric.php :
>>>
>>> "Hexadecimal (e.g. 0xf4c3b00c), Binary (e.g. 0b10100111001), Octal (e.g.
>>> 0777) notation is allowed too but only without sign, decimal and
>>> exponential part."
>>
>> But AISB, the implementation is contradicting the documentation (or vice-
>> versa) because the a string argument containing the binary format causes
>> is_numeric() to return FALSE in PHP 5.4.4 and PHP 5.4.14 (when according
5.4.15(-1; Debian), not .14
>> to the above it should have returned TRUE).
>
> I can confirm issues with is_numeric() wrt. strings in binary notation
> in PHP 5.4.7:
>
> >>> is_numeric('0b1010')
> false
> >>> is_numeric(0b1010)
> true
ACK. However, it is unsurprising to me that the latter would return TRUE
because there the literal is parsed into an “int” value *before* it is
passed to is_numeric(), the equivalent of is_numeric(10).
I would rather the former bug was an implementation bug instead of a
documentation bug, because such a function should either work for all
supported numeric representations of the programming language, or there
should be a parameter specifying which representations are supported for the
specific call [like ECMAScripts parseInt(number : String, base : Number) :
Number].
PointedEars
--
Sometimes, what you learn is wrong. If those wrong ideas are close to the
root of the knowledge tree you build on a particular subject, pruning the
bad branches can sometimes cause the whole tree to collapse.
-- Mike Duffy in cljs, <news:Xns9FB6521286DB8invalidcom@94.75.214.39>
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bug in is_numeric fred <email@address.com> - 2013-05-12 15:22 +0100
Re: bug in is_numeric Salvatore <sal@yojimbo.hack.invalid> - 2013-05-12 15:31 +0000
Re: bug in is_numeric Luuk <luuk@invalid.lan> - 2013-05-12 17:55 +0200
Re: bug in is_numeric Luuk <luuk@invalid.lan> - 2013-05-12 17:58 +0200
Re: bug in is_numeric Thomas Mlynarczyk <thomas@mlynarczyk-webdesign.de> - 2013-05-12 18:06 +0200
Re: bug in is_numeric Denis McMahon <denismfmcmahon@gmail.com> - 2013-05-12 16:24 +0000
Re: bug in is_numeric fred <email@address.com> - 2013-05-12 18:41 +0100
Re: bug in is_numeric Erwin Moller <erwinmollerusenet@xs4all.nl> - 2013-05-13 13:50 +0200
Re: bug in is_numeric fred <email@address.com> - 2013-05-13 14:58 +0100
Re: bug in is_numeric Jerry Stuckle <jstucklex@attglobal.net> - 2013-05-13 10:11 -0400
Re: bug in is_numeric fred <email@address.com> - 2013-05-13 15:15 +0100
Re: bug in is_numeric Erwin Moller <erwinmollerusenet@xs4all.nl> - 2013-05-13 17:29 +0200
Re: bug in is_numeric "J.O. Aho" <user@example.net> - 2013-05-13 19:55 +0200
Re: bug in is_numeric Richard Yates <richard@yatesguitar.com> - 2013-05-14 06:41 -0700
Re: bug in is_numeric SwissCheese <swisscheese@cfl.rr.com> - 2013-05-14 21:43 -0400
Re: bug in is_numeric Jerry Stuckle <jstucklex@attglobal.net> - 2013-05-14 23:01 -0400
Re: bug in is_numeric SwissCheese <swisscheese@cfl.rr.com> - 2013-05-15 05:48 -0400
Re: bug in is_numeric Jerry Stuckle <jstucklex@attglobal.net> - 2013-05-15 06:11 -0400
Re: bug in is_numeric SwissCheese <swisscheese@cfl.rr.com> - 2013-05-16 18:36 -0400
Re: bug in is_numeric Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2013-05-15 15:19 +0200
Re: bug in is_numeric Christoph Becker <cmbecker69@gmx.de> - 2013-05-15 20:23 +0200
Re: bug in is_numeric Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2013-05-15 20:49 +0200
Re: bug in is_numeric Christoph Becker <cmbecker69@gmx.de> - 2013-05-15 21:58 +0200
Re: bug in is_numeric Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2013-05-15 22:20 +0200
Re: bug in is_numeric Christoph Becker <cmbecker69@gmx.de> - 2013-05-15 22:42 +0200
Re: bug in is_numeric Thomas Mlynarczyk <thomas@mlynarczyk-webdesign.de> - 2013-05-15 23:53 +0200
Re: bug in is_numeric Christoph Becker <cmbecker69@gmx.de> - 2013-05-16 00:29 +0200
Re: bug in is_numeric Christoph Becker <cmbecker69@gmx.de> - 2013-05-16 00:40 +0200
Re: bug in is_numeric Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2013-05-16 05:00 +0200
Re: bug in is_numeric SwissCheese <swisscheese@cfl.rr.com> - 2013-05-16 18:16 -0400
Re: bug in is_numeric Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2013-05-17 00:45 +0200
Re: bug in is_numeric SwissCheese <swisscheese@cfl.rr.com> - 2013-05-16 22:52 -0400
Re: bug in is_numeric Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2013-05-17 18:33 +0200
Re: bug in is_numeric Christoph Becker <cmbecker69@gmx.de> - 2013-05-17 20:39 +0200
Re: bug in is_numeric Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2013-05-17 23:45 +0200
Re: bug in is_numeric Christoph Becker <cmbecker69@gmx.de> - 2013-05-18 14:47 +0200
Re: bug in is_numeric SwissCheese <swisscheese@cfl.rr.com> - 2013-05-15 20:57 -0400
Re: bug in is_numeric Jerry Stuckle <jstucklex@attglobal.net> - 2013-05-16 00:09 -0400
Re: bug in is_numeric Christoph Becker <cmbecker69@gmx.de> - 2013-05-17 01:17 +0200
Re: bug in is_numeric Jerry Stuckle <jstucklex@attglobal.net> - 2013-05-16 20:30 -0400
Re: bug in is_numeric Christoph Becker <cmbecker69@gmx.de> - 2013-05-18 14:51 +0200
Re: bug in is_numeric Jerry Stuckle <jstucklex@attglobal.net> - 2013-05-18 10:07 -0400
Re: bug in is_numeric "Sanders Kaufman" <bucky@kaufman.net> - 2013-05-18 11:56 -0500
Re: bug in is_numeric Jerry Stuckle <jstucklex@attglobal.net> - 2013-05-18 14:32 -0400
Re: bug in is_numeric Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2013-05-18 22:24 +0200
Re: bug in is_numeric Jerry Stuckle <jstucklex@attglobal.net> - 2013-05-18 17:01 -0400
Re: bug in is_numeric Denis McMahon <denismfmcmahon@gmail.com> - 2013-05-18 21:58 +0000
Re: bug in is_numeric Jerry Stuckle <jstucklex@attglobal.net> - 2013-05-18 19:21 -0400
Re: bug in is_numeric Denis McMahon <denismfmcmahon@gmail.com> - 2013-05-19 02:22 +0000
Re: bug in is_numeric Jerry Stuckle <jstucklex@attglobal.net> - 2013-05-18 22:41 -0400
Re: bug in is_numeric "Sanders Kaufman" <bucky@kaufman.net> - 2013-05-19 05:28 -0500
Re: bug in is_numeric Jerry Stuckle <jstucklex@attglobal.net> - 2013-05-19 09:42 -0400
Re: bug in is_numeric "Sanders Kaufman" <bucky@kaufman.net> - 2013-05-19 11:42 -0500
Re: bug in is_numeric Jerry Stuckle <jstucklex@attglobal.net> - 2013-05-19 14:39 -0400
Re: bug in is_numeric "Sanders Kaufman" <bucky@kaufman.net> - 2013-05-21 01:01 -0500
Re: bug in is_numeric Jerry Stuckle <jstucklex@attglobal.net> - 2013-05-21 05:59 -0400
Re: bug in is_numeric The Natural Philosopher <tnp@invalid.invalid> - 2013-05-19 07:49 +0100
Re: bug in is_numeric "Sanders Kaufman" <bucky@kaufman.net> - 2013-05-19 05:31 -0500
Re: bug in is_numeric The Natural Philosopher <tnp@invalid.invalid> - 2013-05-19 12:39 +0100
Re: bug in is_numeric Jerry Stuckle <jstucklex@attglobal.net> - 2013-05-19 09:43 -0400
Re: bug in is_numeric "Sanders Kaufman" <bucky@kaufman.net> - 2013-05-19 11:52 -0500
Re: bug in is_numeric Jerry Stuckle <jstucklex@attglobal.net> - 2013-05-19 14:42 -0400
Re: bug in is_numeric "Sanders Kaufman" <bucky@kaufman.net> - 2013-05-21 01:03 -0500
Re: bug in is_numeric Jerry Stuckle <jstucklex@attglobal.net> - 2013-05-21 06:00 -0400
Re: bug in is_numeric "Sanders Kaufman" <bucky@kaufman.net> - 2013-05-19 11:45 -0500
Re: bug in is_numeric "Sanders Kaufman" <bucky@kaufman.net> - 2013-05-19 05:27 -0500
Re: bug in is_numeric Jerry Stuckle <jstucklex@attglobal.net> - 2013-05-19 09:45 -0400
Re: bug in is_numeric "Sanders Kaufman" <bucky@kaufman.net> - 2013-05-19 11:37 -0500
Re: bug in is_numeric Jerry Stuckle <jstucklex@attglobal.net> - 2013-05-19 14:43 -0400
Re: bug in is_numeric "Sanders Kaufman" <bucky@kaufman.net> - 2013-05-21 00:59 -0500
Re: bug in is_numeric Jerry Stuckle <jstucklex@attglobal.net> - 2013-05-21 06:02 -0400
Re: bug in is_numeric "Sanders Kaufman" <bucky@kaufman.net> - 2013-05-18 17:08 -0500
Re: bug in is_numeric The Natural Philosopher <tnp@invalid.invalid> - 2013-05-18 23:58 +0100
Re: bug in is_numeric Jerry Stuckle <jstucklex@attglobal.net> - 2013-05-18 19:22 -0400
Re: bug in is_numeric "Sanders Kaufman" <bucky@kaufman.net> - 2013-05-18 17:11 -0500
Re: bug in is_numeric Jerry Stuckle <jstucklex@attglobal.net> - 2013-05-18 19:23 -0400
Re: bug in is_numeric "Sanders Kaufman" <bucky@kaufman.net> - 2013-05-19 05:35 -0500
Re: bug in is_numeric Jerry Stuckle <jstucklex@attglobal.net> - 2013-05-19 09:46 -0400
Re: bug in is_numeric "Sanders Kaufman" <bucky@kaufman.net> - 2013-05-19 11:23 -0500
Re: bug in is_numeric Jerry Stuckle <jstucklex@attglobal.net> - 2013-05-19 14:44 -0400
Re: bug in is_numeric "Sanders Kaufman" <bucky@kaufman.net> - 2013-05-21 00:54 -0500
Re: bug in is_numeric Jerry Stuckle <jstucklex@attglobal.net> - 2013-05-21 06:03 -0400
Re: bug in is_numeric fred <email@address.com> - 2013-05-23 15:38 +0100
Re: bug in is_numeric Arno Welzel <usenet@arnowelzel.de> - 2013-06-01 17:36 +0200
Re: bug in is_numeric Jerry Stuckle <jstucklex@attglobal.net> - 2013-06-01 14:54 -0400
Re: bug in is_numeric Arno Welzel <usenet@arnowelzel.de> - 2013-06-05 15:25 +0200
Re: bug in is_numeric Jerry Stuckle <jstucklex@attglobal.net> - 2013-06-05 10:34 -0400
Re: bug in is_numeric Arno Welzel <usenet@arnowelzel.de> - 2013-06-05 17:02 +0200
Re: bug in is_numeric Jerry Stuckle <jstucklex@attglobal.net> - 2013-06-05 12:30 -0400
OT: What you say is not always what you mean (was: Re: bug in is_numeric) Arno Welzel <usenet@arnowelzel.de> - 2013-06-05 20:20 +0200
Re: OT: What you say is not always what you mean Jerry Stuckle <jstucklex@attglobal.net> - 2013-06-05 14:40 -0400
Re: bug in is_numeric Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2013-05-18 21:51 +0200
Re: bug in is_numeric "Sanders Kaufman" <bucky@kaufman.net> - 2013-05-18 17:13 -0500
Re: bug in is_numeric Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2013-05-19 00:49 +0200
Re: bug in is_numeric "Sanders Kaufman" <bucky@kaufman.net> - 2013-05-19 05:24 -0500
Re: bug in is_numeric Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2013-05-19 12:40 +0200
Re: bug in is_numeric The Natural Philosopher <tnp@invalid.invalid> - 2013-05-19 12:43 +0100
Re: bug in is_numeric "Sanders Kaufman" <bucky@kaufman.net> - 2013-05-19 11:29 -0500
Re: bug in is_numeric Norman Peelman <npeelman@cfl.rr.com> - 2013-05-18 14:53 -0400
Re: bug in is_numeric SwissCheese <swisscheese@cfl.rr.com> - 2013-05-16 18:41 -0400
Re: bug in is_numeric Daniel Pitts <newsgroup.nospam@virtualinfinity.net> - 2013-05-13 08:35 -0700
Re: bug in is_numeric Denis McMahon <denismfmcmahon@gmail.com> - 2013-05-13 20:26 +0000
Re: bug in is_numeric Denis McMahon <denismfmcmahon@gmail.com> - 2013-05-13 20:15 +0000
Re: bug in is_numeric Robert Heller <heller@deepsoft.com> - 2013-05-12 13:03 -0500
Re: bug in is_numeric Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2013-05-12 18:03 +0200
Re: bug in is_numeric fred <email@address.com> - 2013-05-12 18:34 +0100
Re: bug in is_numeric Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2013-05-12 19:40 +0200
Re: bug in is_numeric Luuk <luuk@invalid.lan> - 2013-05-12 21:51 +0200
Re: bug in is_numeric "Sanders Kaufman" <bucky@kaufman.net> - 2013-05-12 11:47 -0500
Re: bug in is_numeric Luuk <luuk@invalid.lan> - 2013-05-12 18:56 +0200
Re: bug in is_numeric Thomas Mlynarczyk <thomas@mlynarczyk-webdesign.de> - 2013-05-12 19:05 +0200
Re: bug in is_numeric Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2013-05-12 19:38 +0200
Re: bug in is_numeric Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2013-05-12 19:46 +0200
Re: bug in is_numeric Jerry Stuckle <jstucklex@attglobal.net> - 2013-05-12 14:11 -0400
Re: bug in is_numeric Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2013-05-12 20:39 +0200
Re: bug in is_numeric Jerry Stuckle <jstucklex@attglobal.net> - 2013-05-12 16:51 -0400
Re: bug in is_numeric Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2013-05-13 01:27 +0200
Re: bug in is_numeric Jerry Stuckle <jstucklex@attglobal.net> - 2013-05-12 20:35 -0400
Re: bug in is_numeric Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2013-05-13 11:07 +0200
Re: bug in is_numeric Jerry Stuckle <jstucklex@attglobal.net> - 2013-05-13 09:02 -0400
Re: bug in is_numeric Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2013-05-13 16:57 +0200
Re: bug in is_numeric Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2013-05-13 17:10 +0200
Re: bug in is_numeric Jerry Stuckle <jstucklex@attglobal.net> - 2013-05-13 13:52 -0400
Re: bug in is_numeric Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2013-05-13 20:28 +0200
Re: bug in is_numeric SwissCheese <swisscheese@cfl.rr.com> - 2013-05-16 18:28 -0400
Re: bug in is_numeric Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2013-05-17 00:33 +0200
Re: bug in is_numeric SwissCheese <swisscheese@cfl.rr.com> - 2013-05-16 22:34 -0400
Re: bug in is_numeric Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2013-05-18 10:28 +0200
Re: bug in is_numeric Norman Peelman <npeelman@cfl.rr.com> - 2013-05-18 08:00 -0400
Re: bug in is_numeric Luuk <luuk@invalid.lan> - 2013-05-18 14:18 +0200
Re: bug in is_numeric Tim Streater <timstreater@greenbee.net> - 2013-05-18 13:20 +0100
Re: bug in is_numeric Jerry Stuckle <jstucklex@attglobal.net> - 2013-05-18 08:47 -0400
Re: bug in is_numeric The Natural Philosopher <tnp@invalid.invalid> - 2013-05-18 14:05 +0100
Re: bug in is_numeric Jerry Stuckle <jstucklex@attglobal.net> - 2013-05-18 10:16 -0400
Re: bug in is_numeric Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2013-05-18 16:14 +0200
Re: bug in is_numeric Sandman <mr@sandman.net> - 2013-05-14 10:34 +0200
Re: bug in is_numeric fred <email@address.com> - 2013-05-14 14:47 +0100
Re: bug in is_numeric Denis McMahon <denismfmcmahon@gmail.com> - 2013-05-14 14:54 +0000
Re: bug in is_numeric Sandman <mr@sandman.net> - 2013-05-15 08:05 +0200
Re: bug in is_numeric Jerry Stuckle <jstucklex@attglobal.net> - 2013-05-15 06:27 -0400
Re: bug in is_numeric Erwin Moller <erwinmollerusenet@xs4all.nl> - 2013-05-15 13:11 +0200
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