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Re: Rejecting Certain Non-ASCII Characters

Message-ID <4433483.hWCz3MVrGr@PointedEars.de> (permalink)
From Thomas 'PointedEars' Lahn <PointedEars@web.de>
Organization PointedEars Software (PES)
Date 2013-04-20 14:15 +0200
Subject Re: Rejecting Certain Non-ASCII Characters
Newsgroups comp.lang.php
References <qfq2n85a3pb4eegtf7buji0o8ern0r838m@4ax.com> <atf0h1Fkts9U1@mid.uni-berlin.de>

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M. Strobel wrote:

> Am 19.04.2013 18:16, schrieb Jim Higgins:
>> I have a problem with people entering a slashed zero vs a standard
>> ASCII zero into HTML forms intended to store data in a MySQL database.
>> 
>> Is there a simple way in PHP to restrict input to the ASCII Character
>> set, specifically hex 0x20 - 0x7E ?  Or a simple way to detect
>> characters outside this range before committing them to the database?
>> 
>> My mind says it should be easy to detect and that I should be able to
>> do it myself, but for some reason I'm drawing a huge blank.
> 
> I skipped the long discussion, it looks like having little to do with your
> question.
> 
> Input data has to be filtered, IN ANY CASE, plus properly escaped upon
> insertion into the database.
> 
> For number input, do something like
> 
> $val = sscanf($_POST[$key], '%d')
> 
> for signed numbers, or
> 
> preg_match('#^[0-9]+$#', $_POST[$key])
> 
> for ASCII numbers. Other helpful functions are cast to integer,
> ctype_digit(), ...

Nobody said anything about numbers before, though, and with your From header 
field value you are *still* violating the Acceptable Use Policy of your 
Usenet service provider, uni-berlin.de.


PointedEars
-- 
var bugRiddenCrashPronePieceOfJunk = (
    navigator.userAgent.indexOf('MSIE 5') != -1
    && navigator.userAgent.indexOf('Mac') != -1
)  // Plone, register_function.js:16

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Thread

Rejecting Certain Non-ASCII Characters Jim Higgins <ILikeMy@Privacy.bogus> - 2013-04-19 16:16 +0000
  Re: Rejecting Certain Non-ASCII Characters Lew Pitcher <lpitcher@teksavvy.com> - 2013-04-19 12:29 -0400
  Re: Rejecting Certain Non-ASCII Characters Daniel Pitts <newsgroup.nospam@virtualinfinity.net> - 2013-04-19 09:30 -0700
    Re: Rejecting Certain Non-ASCII Characters Jim Higgins <ILikeMy@Privacy.bogus> - 2013-04-19 21:38 +0000
      Re: Rejecting Certain Non-ASCII Characters Jim Higgins <ILikeMy@Privacy.bogus> - 2013-04-19 22:11 +0000
  Re: Rejecting Certain Non-ASCII Characters Jerry Stuckle <jstucklex@attglobal.net> - 2013-04-19 12:48 -0400
    Re: Rejecting Certain Non-ASCII Characters Jim Higgins <ILikeMy@Privacy.bogus> - 2013-04-19 21:46 +0000
      Re: Rejecting Certain Non-ASCII Characters Jerry Stuckle <jstucklex@attglobal.net> - 2013-04-19 18:00 -0400
      Re: Rejecting Certain Non-ASCII Characters Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2013-04-20 01:23 +0200
  Re: Rejecting Certain Non-ASCII Characters Christoph Becker <cmbecker69@gmx.de> - 2013-04-19 19:38 +0200
    Re: Rejecting Certain Non-ASCII Characters Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2013-04-19 22:33 +0200
      Re: Rejecting Certain Non-ASCII Characters Christoph Becker <cmbecker69@gmx.de> - 2013-04-19 23:08 +0200
        Re: Rejecting Certain Non-ASCII Characters Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2013-04-20 01:12 +0200
          Re: Rejecting Certain Non-ASCII Characters Christoph Becker <cmbecker69@gmx.de> - 2013-04-22 13:25 +0200
            Re: Rejecting Certain Non-ASCII Characters Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2013-04-22 13:29 +0200
        Re: Rejecting Certain Non-ASCII Characters Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2013-04-20 14:08 +0200
          Re: Rejecting Certain Non-ASCII Characters Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2013-04-20 17:52 +0200
    Re: Rejecting Certain Non-ASCII Characters Jim Higgins <ILikeMy@Privacy.bogus> - 2013-04-19 22:06 +0000
      Re: Rejecting Certain Non-ASCII Characters Christoph Becker <cmbecker69@gmx.de> - 2013-04-20 00:26 +0200
        Re: Rejecting Certain Non-ASCII Characters Jerry Stuckle <jstucklex@attglobal.net> - 2013-04-19 19:53 -0400
          Re: Rejecting Certain Non-ASCII Characters Christoph Becker <cmbecker69@gmx.de> - 2013-04-20 02:36 +0200
            Re: Rejecting Certain Non-ASCII Characters Jerry Stuckle <jstucklex@attglobal.net> - 2013-04-19 20:58 -0400
              Re: Rejecting Certain Non-ASCII Characters Christoph Becker <cmbecker69@gmx.de> - 2013-04-20 03:34 +0200
  Re: Rejecting Certain Non-ASCII Characters Arno Welzel <usenet@arnowelzel.de> - 2013-04-19 22:19 +0200
  Re: Rejecting Certain Non-ASCII Characters "M. Strobel" <sorry_no_mail_here@nowhere.dee> - 2013-04-20 10:04 +0200
    Re: Rejecting Certain Non-ASCII Characters Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2013-04-20 14:15 +0200
      Re: Rejecting Certain Non-ASCII Characters "M. Strobel" <sorry_no_mail_here@nowhere.dee> - 2013-04-20 14:26 +0200
        Re: Rejecting Certain Non-ASCII Characters Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2013-04-20 14:34 +0200
        Re: Rejecting Certain Non-ASCII Characters Arno Welzel <usenet@arnowelzel.de> - 2013-04-20 14:41 +0200
          Re: Rejecting Certain Non-ASCII Characters Jerry Stuckle <jstucklex@attglobal.net> - 2013-04-20 08:43 -0400
            Re: Rejecting Certain Non-ASCII Characters Arno Welzel <usenet@arnowelzel.de> - 2013-04-20 14:55 +0200
              Re: Rejecting Certain Non-ASCII Characters Jerry Stuckle <jstucklex@attglobal.net> - 2013-04-20 09:04 -0400
                Re: Rejecting Certain Non-ASCII Characters Arno Welzel <usenet@arnowelzel.de> - 2013-04-20 21:29 +0200
                Re: Rejecting Certain Non-ASCII Characters Jerry Stuckle <jstucklex@attglobal.net> - 2013-04-20 20:03 -0400
                Re: Rejecting Certain Non-ASCII Characters Arno Welzel <usenet@arnowelzel.de> - 2013-04-21 06:51 +0200
                Re: Rejecting Certain Non-ASCII Characters Arno Welzel <usenet@arnowelzel.de> - 2013-04-21 06:57 +0200
                Re: Rejecting Certain Non-ASCII Characters Jerry Stuckle <jstucklex@attglobal.net> - 2013-04-21 08:45 -0400
                Re: Rejecting Certain Non-ASCII Characters Tim Streater <timstreater@greenbee.net> - 2013-04-21 15:09 +0100
                Re: Rejecting Certain Non-ASCII Characters Jerry Stuckle <jstucklex@attglobal.net> - 2013-04-21 10:29 -0400
                Re: Rejecting Certain Non-ASCII Characters Jerry Stuckle <jstucklex@attglobal.net> - 2013-04-21 08:44 -0400
              Re: Rejecting Certain Non-ASCII Characters The Natural Philosopher <tnp@invalid.invalid> - 2013-04-20 15:07 +0100
                Re: Rejecting Certain Non-ASCII Characters Jerry Stuckle <jstucklex@attglobal.net> - 2013-04-20 20:06 -0400
          Re: Rejecting Certain Non-ASCII Characters "M. Strobel" <sorry_no_mail_here@nowhere.dee> - 2013-04-20 17:43 +0200
            Re: Rejecting Certain Non-ASCII Characters Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2013-04-20 18:01 +0200
              Re: Rejecting Certain Non-ASCII Characters "M. Strobel" <sorry_no_mail_here@nowhere.dee> - 2013-04-20 18:17 +0200
                Address munging (was: Rejecting Certain Non-ASCII Characters) Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2013-04-20 18:23 +0200
            OT: Address munging (was: Re: Rejecting Certain Non-ASCII Characters) Arno Welzel <usenet@arnowelzel.de> - 2013-04-20 21:25 +0200
            Re: Rejecting Certain Non-ASCII Characters Denis McMahon <denismfmcmahon@gmail.com> - 2013-04-20 22:06 +0000
              Re: Rejecting Certain Non-ASCII Characters Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2013-04-22 14:10 +0200

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