Re: array_walk_recursive and call by reference - possible?

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From	"M. Strobel" <sorry_no_mail_here@nowhere.dee>
Newsgroups	comp.lang.php
Subject	Re: array_walk_recursive and call by reference - possible?
Date	Sun, 05 Feb 2012 22:31:31 +0100
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Am 05.02.2012 19:07, schrieb M. Strobel:
> Hi,
> 
> I have designed an array with occasional arrays as values, to mimic the structure of
> a html select element with optgroup entries.
> 
> Now I need some functions like counting all selectable elements, and searching a key.
> 
> I thought array_walk_recursive() was appropriate for this task. But now I have a
> problem getting values out of my callback. I could use globals here, but nicer seemed
> to be: an extra function parameter "by reference".
> 
> Now I keep getting PHP Deprecated:  Call-time pass-by-reference has been deprecated
> in ...
> 
> I know I can suppress these messages, but is there an "official" way to pass
> variables by reference with a callback?
> 
> I tested all possible combinations, test script attached.
> 
> /Str.

script cut off

Maybe I should have shown the result of the test:

strobel@s114-intel:~/projekte/PHP> php test-array-walks.php
PHP Deprecated:  Call-time pass-by-reference has been deprecated in
/home/strobel/projekte/PHP/test-array-walks.php on line 38

Deprecated: Call-time pass-by-reference has been deprecated in
/home/strobel/projekte/PHP/test-array-walks.php on line 38
PHP Deprecated:  Call-time pass-by-reference has been deprecated in
/home/strobel/projekte/PHP/test-array-walks.php on line 56

Deprecated: Call-time pass-by-reference has been deprecated in
/home/strobel/projekte/PHP/test-array-walks.php on line 56
Number of elements using count(): 5
array_key_exists() does NOT work in sub-arrays
------------------------------
        Start run
------------------------------
var before array_walk: (something)
rc = 1, var after array_walk with call by ref: (Karl)
------------------------------
var before array_walk: (something)
rc = 1, var after array_walk with define by ref, call by val: (something)
------------------------------
var before array_walk: (something)
rc = 1, var after array_walk with define by ref + call by ref: (Karl)
------------------------------

Résumé: every working combination of by-ref/by-val gets a deprecated message.

/Str.

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array_walk_recursive and call by reference - possible? "M. Strobel" <sorry_no_mail_here@nowhere.dee> - 2012-02-05 19:07 +0100
  Re: array_walk_recursive and call by reference - possible? "M. Strobel" <sorry_no_mail_here@nowhere.dee> - 2012-02-05 22:31 +0100

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