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Re: bug in is_numeric

Message-ID <9869380.OEKH2unXeN@PointedEars.de> (permalink)
From Thomas 'PointedEars' Lahn <PointedEars@web.de>
Organization PointedEars Software (PES)
Date 2013-05-15 15:19 +0200
Subject Re: bug in is_numeric
Newsgroups comp.lang.php
References (6 earlier) <MPG.2bfb05badc66f3d69896b0@news.virginmedia.com> <jif4p8lqcjcin9inpluivhc8rcj96qn21d@4ax.com> <kmup14$3cp$2@dont-email.me> <kmutiq$ld3$1@dont-email.me> <kmvlet$o6o$1@dont-email.me>

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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 to 
the above it should have returned TRUE).  It is not possible to determine by 
testing whether the octal format is considered numeric because of itself or 
because it is considered decimal.  Incidentally, you have neglected to test 
those two formats.


PointedEars
-- 
Danny Goodman's books are out of date and teach practices that are
positively harmful for cross-browser scripting.
  -- Richard Cornford, cljs, <cife6q$253$1$8300dec7@news.demon.co.uk> (2004)

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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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