NYCPHP Meetup

[Phil Powell]

Ok, Daniel, let's investigate here:

1) what version of PHP are you using? I am using 4.1.3

2) Why does your work, here is mine and it does NOT work!

<?php

 function change(&$array, $index) {
  $array =  strtoupper($array);
}

$blah = array('a', 'b', 'c');
var_dump($blah);
array_walk($blah, 'change');
var_dump($blah);

?>

Go to http://valsignalandet.com/aablah.php and see the results.. It does NOT
work!!!

However, yours does (go to http://valsignalandet.com/aablah2.php) Here is
the code I copied:

 <?php
 $arr = array('a', 'b', 'c');
 var_dump($arr);
 function change(&$array, $index) {
 $array = 'I have changed you!';
 }

 array_walk($arr, 'change');
 var_dump($arr);
 ?>


Why does yours work and mine does not, exact same logic only different
methodology, one returns a result, the other does not..  That is not enough
proof to just say "Good job PHP Team" and declare array_walk saves the
universe from eternal peril.

Phil
----- Original Message ----- 
From: "Daniel Kushner" <nyphp at websapp.com>
To: "NYPHP Talk" <talk at lists.nyphp.org>
Sent: Thursday, November 06, 2003 10:18 PM
Subject: RE: [nycphp-talk] Second time array_walk failed for me


> Phil,
>
> >
> > 1) Why does the PHP manual say that "array_walk" CAN change the values
in
> > the array, when, in fact, it can't?
>
> yes it can!
>
> > 2) If 1 is answerable, does that mean the manual is either misleading on
> > array_walk, or, oh no WRONG?
>
> >From the manual:
> Note: If function needs to be working with the actual values of the array,
> specify the first parameter of function as a reference. Then, any changes
> made to those elements will be made in the original array itself.
>
>
> Some code to test:
> <?php
> $arr = array('a', 'b', 'c');
> var_dump($arr);
> function change(&$array, $index) {
> $array = 'I have changed you!';
> }
>
> array_walk($arr, 'change');
> var_dump($arr);
> ?>
>
> The output:
> array(3) { [0]=> string(1) "a" [1]=> string(1) "b" [2]=> string(1) "c" }
>
> array(3) { [0]=> string(19) "I have changed you!" [1]=> string(19) "I have
> changed you!" [2]=> string(19) "I have changed you!" }
>
>
>
> Oh my, it works !! Great job PHP Team !
>
> --Daniel
>
>
> _______________________________________________
> talk mailing list
> talk at lists.nyphp.org
> http://lists.nyphp.org/mailman/listinfo/talk