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Re: Validate Radio Buttons?

From Denis McMahon <denismfmcmahon@gmail.com>
Newsgroups comp.lang.php
Subject Re: Validate Radio Buttons?
Date 2013-07-31 21:37 +0000
Organization A noiseless patient Spider
Message-ID <ktc030$61m$3@dont-email.me> (permalink)
References <ktbkh6$j00$1@speranza.aioe.org> <ktbmss$41m$1@dont-email.me>

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On Wed, 31 Jul 2013 15:07:17 -0400, Jerry Stuckle wrote:

> On 7/31/2013 2:20 PM, Twayne wrote:

>> Should one Validate Radio Buttons for an online website contact form?

> Good practice means you ALWAYS validate ALL information from the user.
> You may have a radio button on your form - but there is no guarantee the
> request comes on from your form.

As a follow up to Jerry, radio buttons and select lists are probably the 
easiest elements to validate in the server side code because, by 
definition, you expect them to be one of a discrete set of values, and if 
they're not a member of that set of values, then someone is playing silly 
buggers.

You could use in_array to check that the value received is in an array of 
expected values, and then use the value directly; or you could switch on 
the value received, with a case for each of the expected values. In both 
cases, you can detect and respond as you feel appropriate for unexpected 
values.

-- 
Denis McMahon, denismfmcmahon@gmail.com

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Thread

Validate Radio Buttons? Twayne <nobody@spamcop.net> - 2013-07-31 14:20 -0400
  Re: Validate Radio Buttons? The Natural Philosopher <tnp@invalid.invalid> - 2013-07-31 20:00 +0100
    Re: Validate Radio Buttons? Twayne <nobody@spamcop.net> - 2013-08-01 17:11 -0400
  Re: Validate Radio Buttons? Jerry Stuckle <jstucklex@attglobal.net> - 2013-07-31 15:07 -0400
    Re: Validate Radio Buttons? Denis McMahon <denismfmcmahon@gmail.com> - 2013-07-31 21:37 +0000
      Re: Validate Radio Buttons? Twayne <nobody@spamcop.net> - 2013-08-01 16:47 -0400
        Re: Validate Radio Buttons? Jerry Stuckle <jstucklex@attglobal.net> - 2013-08-01 17:25 -0400
          Re: Validate Radio Buttons? Twayne <nobody@spamcop.net> - 2013-08-01 17:53 -0400
            Re: Validate Radio Buttons? Jerry Stuckle <jstucklex@attglobal.net> - 2013-08-01 19:50 -0400
    Re: Validate Radio Buttons? Twayne <nobody@spamcop.net> - 2013-08-01 17:16 -0400
      Re: Validate Radio Buttons? The Natural Philosopher <tnp@invalid.invalid> - 2013-08-02 00:40 +0100
        Re: Validate Radio Buttons? Jerry Stuckle <jstucklex@attglobal.net> - 2013-08-01 20:09 -0400
        Re: Validate Radio Buttons? Twayne <nobody@spamcop.net> - 2013-08-02 19:42 -0400
          Re: Validate Radio Buttons? Jerry Stuckle <jstucklex@attglobal.net> - 2013-08-02 19:56 -0400
            Re: Validate Radio Buttons? Twayne <nobody@spamcop.net> - 2013-08-04 11:57 -0400
              Re: Validate Radio Buttons? Jerry Stuckle <jstucklex@attglobal.net> - 2013-08-04 22:06 -0400
                Re: Validate Radio Buttons? Twayne <nobody@spamcop.net> - 2013-08-05 11:17 -0400
                Re: Validate Radio Buttons? Jerry Stuckle <jstucklex@attglobal.net> - 2013-08-05 11:33 -0400
      Re: Validate Radio Buttons? Jerry Stuckle <jstucklex@attglobal.net> - 2013-08-01 19:53 -0400
        Re: Validate Radio Buttons? Christoph Michael Becker <cmbecker69@arcor.de> - 2013-08-02 03:25 +0200
          Re: Validate Radio Buttons? Jerry Stuckle <jstucklex@attglobal.net> - 2013-08-01 22:10 -0400
            Re: Validate Radio Buttons? Twayne <nobody@spamcop.net> - 2013-08-02 20:06 -0400
              Re: Validate Radio Buttons? Jerry Stuckle <jstucklex@attglobal.net> - 2013-08-02 20:20 -0400
          Re: Validate Radio Buttons? - LiveHTTP headers bill <william@TechServSys.com> - 2013-08-02 08:05 -0400
            Re: Validate Radio Buttons? - LiveHTTP headers The Natural Philosopher <tnp@invalid.invalid> - 2013-08-02 13:21 +0100
            Re: Validate Radio Buttons? - LiveHTTP headers Jerry Stuckle <jstucklex@attglobal.net> - 2013-08-02 08:44 -0400
          Re: Validate Radio Buttons? Twayne <nobody@spamcop.net> - 2013-08-02 19:51 -0400
        Re: Validate Radio Buttons? Twayne <nobody@spamcop.net> - 2013-08-02 19:47 -0400
          Re: Validate Radio Buttons? Jerry Stuckle <jstucklex@attglobal.net> - 2013-08-02 19:54 -0400
      Re: Validate Radio Buttons? Scott Johnson <noonehome@chalupasworld.com> - 2013-08-01 16:54 -0700
        Re: Validate Radio Buttons? Twayne <nobody@spamcop.net> - 2013-08-02 20:10 -0400
          Re: Validate Radio Buttons? Scott Johnson <noonehome@chalupasworld.com> - 2013-08-02 17:21 -0700
  Re: Validate Radio Buttons? RESOLVED Twayne <nobody@spamcop.net> - 2013-08-04 16:17 -0400

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