Re: A little tip

From	Shelly <sheldonlg@thevillages.net>
Newsgroups	comp.lang.php
Subject	Re: A little tip
Date	2012-03-30 14:18 -0400
Organization	A noiseless patient Spider
Message-ID	<jl4te2$hi5$1@dont-email.me> (permalink)
References	<jl4ovl$h2i$1@dont-email.me> <jl4q1i$top$1@dont-email.me>

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On 3/30/2012 1:20 PM, Jerry Stuckle wrote:
> On 3/30/2012 1:02 PM, Shelly wrote:
>> Here is something I jist came across, so I am passing it on:
>> ==========
>> $val= TRUE;
>> $val &= TRUE;
>> print ($val === TRUE) ? "Triple is true\n" : "Triple is false\n";
>> print ($val == TRUE) ? "Double is true\n" : "Double is false\n";
>>
>> Results in:
>> Triple is false
>> Double is true
>> ==========
>>
>> Who designed that? It is totally counter-intuitive.
>>
>
> Yes, just another problem with PHP. After the second assignment, $val is
> actually a reference to TRUE. However, a variable should not be able to
> reference a constant. For instance, what would the following do?
>
> $val &= TRUE;
> $val = 3;
>
> Are we setting TRUE to 3 (that's what a reference should do, after all).
>
> This is why other languages don't allow references to constants.

Huh?  How is it a reference?  I wrote

$val = TRUE;

That sets TRUE as the value contained in the location specified by the 
variable $val.

Then I wrote

$val &= TRUE;

which is identical to

$val = $val && TRUE;

isn't it, which should put into the location of $val the resulting value 
of the logical operation of TRUE AND TRUE -- which SHOULD be TRUE. 
Instead, it is something other than FALSE or ZERO, but not === to TRUE.

Your answer seems to be as if I had written

$val = &TRUE;
$val = 3;

Am I missing something here?

-- 
Shelly

Thread

A little tip Shelly <sheldonlg@thevillages.net> - 2012-03-30 13:02 -0400
  Re: A little tip Jerry Stuckle <jstucklex@attglobal.net> - 2012-03-30 13:20 -0400
    Re: A little tip Shelly <sheldonlg@thevillages.net> - 2012-03-30 14:18 -0400
      Re: A little tip Jerry Stuckle <jstucklex@attglobal.net> - 2012-03-30 16:19 -0400
      Re: A little tip Thomas Mlynarczyk <thomas@mlynarczyk-webdesign.de> - 2012-03-30 22:30 +0200
        Re: A little tip Doug Miller <doug_at_milmac_dot_com@example.com> - 2012-03-30 20:55 +0000
        Re: A little tip Shelly <sheldonlg@thevillages.net> - 2012-03-30 16:55 -0400
          Re: A little tip Jerry Stuckle <jstucklex@attglobal.net> - 2012-03-30 17:07 -0400
          Re: A little tip Jerry Stuckle <jstucklex@attglobal.net> - 2012-03-31 10:05 -0400
            Re: A little tip Shelly <sheldonlg@thevillages.net> - 2012-03-31 11:27 -0400
          Re: A little tip Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2012-04-03 15:52 +0200
            Re: A little tip Shelly <sheldonlg@thevillages.net> - 2012-04-03 10:20 -0400
    Re: A little tip Doug Miller <doug_at_milmac_dot_com@example.com> - 2012-03-30 19:36 +0000
      Re: A little tip Jerry Stuckle <jstucklex@attglobal.net> - 2012-03-30 16:21 -0400
        Re: A little tip Doug Miller <doug_at_milmac_dot_com@example.com> - 2012-03-30 20:52 +0000
          Re: A little tip Jerry Stuckle <jstucklex@attglobal.net> - 2012-03-30 17:08 -0400
            Re: A little tip Shelly <sheldonlg@thevillages.net> - 2012-03-30 17:22 -0400
              Re: A little tip "Mr. B-o-B" <mr.chew.baka@gmail.com> - 2012-03-30 18:00 -0500
                Re: A little tip Scott Johnson <noonehome@chalupasworld.com> - 2012-03-30 20:33 -0700
          Re: A little tip Shelly <sheldonlg@thevillages.net> - 2012-03-30 17:20 -0400
            Re: A little tip Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2012-04-03 15:56 +0200
              Re: A little tip Shelly <sheldonlg@thevillages.net> - 2012-04-03 10:20 -0400
          Re: A little tip Michael Fesser <netizen@gmx.de> - 2012-03-31 05:04 +0200
            Re: A little tip Jerry Stuckle <jstucklex@attglobal.net> - 2012-03-30 23:31 -0400
          Re: A little tip Scott Johnson <noonehome@chalupasworld.com> - 2012-03-30 20:35 -0700
            Re: A little tip Jerry Stuckle <jstucklex@attglobal.net> - 2012-03-30 23:53 -0400
              Re: A little tip Doug Miller <doug_at_milmac_dot_com@example.com> - 2012-03-31 11:58 +0000
                Re: A little tip Jerry Stuckle <jstucklex@attglobal.net> - 2012-03-31 09:05 -0400
  Re: A little tip "Álvaro G. Vicario" <alvaro.NOSPAMTHANX@demogracia.com.invalid> - 2012-04-02 09:42 +0200
    Re: A little tip "M. Strobel" <sorry_no_mail_here@nowhere.dee> - 2012-04-02 10:22 +0200
      Re: A little tip Shelly <sheldonlg@thevillages.net> - 2012-04-02 08:15 -0400
        Re: A little tip "M. Strobel" <sorry_no_mail_here@nowhere.dee> - 2012-04-02 14:27 +0200
          Re: A little tip Shelly <sheldonlg@thevillages.net> - 2012-04-02 09:40 -0400
            Re: A little tip "M. Strobel" <sorry_no_mail_here@nowhere.dee> - 2012-04-02 23:43 +0200

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