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Re: bug in is_numeric

Message-ID <1536050.N0pG7d5rYB@PointedEars.de> (permalink)
From Thomas 'PointedEars' Lahn <PointedEars@web.de>
Organization PointedEars Software (PES)
Date 2013-05-12 19:46 +0200
Subject Re: bug in is_numeric
Newsgroups comp.lang.php
References <MPG.2bf9b5f139f7cb7d9896aa@news.virginmedia.com> <6JPjt.2779$7j7.1429@newsfe14.iad> <kmoi50$bkc$1@news.albasani.net> <1851737.v4KHZ1CCSF@PointedEars.de>

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Thomas 'PointedEars' Lahn wrote:

> Thomas Mlynarczyk wrote:
>> Sanders Kaufman schrieb:
>>>> if(is_numeric('x11.11c')  returns  TRUE
>>> Try it without the quotation marks around the number.
>> 
>> Which number? x11.11c is not a number.
> 
> The misconception might partially draw from the fact that 0x11 is a
> number,
> the hexadecimal representation of decimal 16¹ + 16⁰ = 17 (even in PHP). 
> In other programming languages that require a leading “0” and do not have
                                     ^ do not
> “.” as (concatenation) operator,
> 
>   x11.11c
> 
> could be the representation of decimal 16¹ + 16⁰ + 16⁻¹ + 16⁻² + 13 × 16⁻³
> = 17.06958 […]

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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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