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Groups > comp.lang.php > #9398

Re: bug in is_numeric

Message-ID <2571537.9COuFGnqet@PointedEars.de> (permalink)
From Thomas 'PointedEars' Lahn <PointedEars@web.de>
Organization PointedEars Software (PES)
Date 2013-05-17 00:45 +0200
Subject Re: bug in is_numeric
Newsgroups comp.lang.php
References (10 earlier) <kmvlet$o6o$1@dont-email.me> <9869380.OEKH2unXeN@PointedEars.de> <kn0jok$ebm$1@speranza.aioe.org> <1934679.jXLOkI38UW@PointedEars.de> <kn3ljs$cqo$1@dont-email.me>

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SwissCheese wrote:

> On 05/15/2013 02:49 PM, Thomas 'PointedEars' Lahn wrote:
>> Christoph Becker wrote:
>>> Thomas 'PointedEars' Lahn wrote:
>>>> 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].
> 
> Thomas,

This is NetNews, not e-mail.
 
>    Looking into the source (PHP) there is no code to support binary
> strings of the type '0b1010101'. The code for hexadecimal is there
> however.

AISB, testing with PHP does not help to resolve the basic issue here.  From 
such tests it is still unclear whether not supporting the binary format is 
an implementation bug, i. e. an omission of supporting the binary format 
introduced with PHP 5.4; or a documentation bug, i. e. manual claiming that 
is_numeric() supports more than it is actually supposed to.

What would be interesting instead is to look at the source code from which 
PHP 5.4 and particularly is_numeric() is built as that could at least show 
if the octal format would be recognized, and if there was support for the 
binary format that was just not properly triggered.

> [Tests]

This was so unnecessary.  We have already ascertained how the implementation 
works or rather how it does not work.  Learn to read for a change, will you?


PointedEars
-- 
When all you know is jQuery, every problem looks $(olvable).

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Thread

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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