Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > comp.lang.php > #12984

Re: Completely stumped (still)

Show all headers | View raw

Christoph Michael Becker wrote:

> Thomas 'PointedEars' Lahn wrote:
>> Christoph Michael Becker wrote:
>>> Jerry Stuckle wrote:
>>>> On 2/24/2014 6:53 PM, Richard Yates wrote:
>>>>> I inserted var_dump successively at each stage in the script to see
>>>>> where it changes from the (correct) array to a (incorrect) string. I
>>>>> narrowed it down to ONE statement, but cannot see how that could
>>>>> possibly change the variable. Here's the section with var_dump, then
>>>>> the one statement, and then the var_dump repeated exactly.
>>>>>
>>>>>     var_dump($_SESSION['to']);
>>>>>     $to=$_SESSION['to'][$ct]['email'];
>>>>>     var_dump($_SESSION['to']);
>>>>>
>>>>> The output of the two var_dumps is:
>>>>>
>>>>> The first:
>>>>>     array(1) { [0]=> array(3)
>>>>>              { ["fname"]=> string(4) "Dick"
>>>>>           ["lname"]=> string(5) "Yates"
>>>>>           ["email"]=> string(23) "dyates@salemharvest.org" }
>>>>>              }
>>>>>
>>>>> The second:
>>>>>     string(23) "dyates@salemharvest.org"
>>>>>
>>>>> If I comment out the second line  (that sets $to), the second var_dump
>>>>> comes out correct. Am I losing my mind?
>>>>
>>>> The failing server has register_globals enabled.
>>>
>>> I'm still confused that it seems that register_globals makes the
>>> respective global variables *references* to the session variables.
>> 
>> Or both of them are references to the same array element.  Whatever the
>> implementation, it is the case that they yield the same value then, and
>> it is – if I may say so – a *logical* consequence of how register_globals
>> is supposed to work.
> 
> However, GPC parameters are *copied* to the respective global variables.

How did you get that idea?

>  Why is it logical to make global variables references to session
> variables (resp. let both reference the same variable/element)?

The (error-prone, unsafe) shortcut that register_globals allowed would have 
been inconsistent otherwise.
 
>>                    $*_VARS were first.
> 
> According to the manual $HTTP_SESSION_VARS and $_SESSION are different
> variables, anyway.[1]
> 
> [1] <http://www.php.net/manual/en/reserved.variables.session.php>

$_SESSION is a superglobal; $HTTP_SESSION_VARS is/was not (i.e., it needs to 
be declared a global if it is to be accessed from local context).  But I am 
quite certain that when both were still supported, if you modified one, you 
modified the other (I have only PHP 5.5.9 to test with, where there is no 
$HTTP_SESSION_VARS anymore).


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)

Back to comp.lang.php | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread

Thread

Completely stumped Richard Yates <richard@yatesguitar.com> - 2014-02-24 14:51 -0800
  Re: Completely stumped (still) Richard Yates <richard@yatesguitar.com> - 2014-02-24 15:53 -0800
    Re: Completely stumped (still) Christoph Michael Becker <cmbecker69@arcor.de> - 2014-02-25 01:11 +0100
      Re: Completely stumped (still) Richard Yates <richard@yatesguitar.com> - 2014-02-24 16:24 -0800
        Re: Completely stumped (still) Christoph Michael Becker <cmbecker69@arcor.de> - 2014-02-25 01:49 +0100
          Re: Completely stumped (still) Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2014-02-25 03:37 +0100
            Re: Completely stumped (still) Jerry Stuckle <jstucklex@attglobal.net> - 2014-02-24 22:01 -0500
              Re: Completely stumped (still) Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2014-02-25 19:38 +0100
                Re: Completely stumped (still) Jerry Stuckle <jstucklex@attglobal.net> - 2014-02-25 14:06 -0500
                Re: Completely stumped (still) Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2014-02-25 20:28 +0100
                Re: Completely stumped (still) Jerry Stuckle <jstucklex@attglobal.net> - 2014-02-25 16:04 -0500
    Re: Completely stumped (still) Jerry Stuckle <jstucklex@attglobal.net> - 2014-02-24 20:59 -0500
      Re: Completely stumped (still) Richard Yates <richard@yatesguitar.com> - 2014-02-24 19:00 -0800
        Re: Completely stumped (still) Jerry Stuckle <jstucklex@attglobal.net> - 2014-02-24 22:04 -0500
          Re: Completely stumped (still) Richard Yates <richard@yatesguitar.com> - 2014-02-24 21:09 -0800
            Re: Completely stumped (still) Richard Yates <richard@yatesguitar.com> - 2014-02-24 21:30 -0800
      Re: Completely stumped (still) Christoph Michael Becker <cmbecker69@arcor.de> - 2014-02-25 20:27 +0100
        Re: Completely stumped (still) Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2014-02-25 20:34 +0100
          Re: Completely stumped (still) Christoph Michael Becker <cmbecker69@arcor.de> - 2014-02-25 22:46 +0100
            Re: Completely stumped (still) Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2014-02-25 23:30 +0100
              Re: Completely stumped (still) Christoph Michael Becker <cmbecker69@arcor.de> - 2014-02-26 00:03 +0100
                Re: Completely stumped (still) Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2014-02-26 00:29 +0100
                Re: Completely stumped (still) Christoph Michael Becker <cmbecker69@arcor.de> - 2014-02-26 19:50 +0100
                Re: Completely stumped (still) Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2014-02-26 22:20 +0100
                Re: Completely stumped (still) Christoph Michael Becker <cmbecker69@arcor.de> - 2014-02-27 00:21 +0100
        Re: Completely stumped (still) Richard Yates <richard@yatesguitar.com> - 2014-02-25 12:39 -0800
        Re: Completely stumped (still) Jerry Stuckle <jstucklex@attglobal.net> - 2014-02-25 16:06 -0500

csiph-web