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Re: Rejecting Certain Non-ASCII Characters

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Message-ID <1751936.yjBK1YJZ3H@PointedEars.de> (permalink)
From Thomas 'PointedEars' Lahn <PointedEars@web.de>
Reply-To Thomas 'PointedEars' Lahn <php@PointedEars.de>
Organization PointedEars Software (PES)
Date Sat, 20 Apr 2013 01:12:23 +0200
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Subject Re: Rejecting Certain Non-ASCII Characters
Newsgroups comp.lang.php
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Christoph Becker wrote:

> Thomas 'PointedEars' Lahn wrote:
>> Christoph Becker wrote:
>>> Jim Higgins wrote:
>>>> 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?
>>>
>>> If you're dealing with a numeric column, you may consider checking for
>>> is_numeric().
>> 
>> There are also regular expressions.  Testing against '/[^\0x00-\x7F]/',
>> and rejecting anything that matches, appears to be the best approach
>> here.
> 
> For a numeric column?  Why not at least trim down the possibilites of
      ^^^^^^^^^^^^^^^^
> setting illegal values for the SQL statement?

A numeric column is *your* idea.  The questions I have answered were the 
ones that were *actually* asked:

| 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?

The character at US-ASCII code point 0x7E is _not_ a digit in any number 
base.


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Danny Goodman's books are out of date and teach practices that are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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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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