array walk and class member functions

[Tom <tom@xxxxxxxxxxxxxxxxxxxxx>]

Hi

I'm batting my head against a wall on this one...
I have a class that has a constructor which sets some initial 
conditions, and then a public function that does some work. I want to be 
able to call this function from an external array_walk call, but when I 
try and reference it as $myClass->myFunction in the array_walk call, I 
get an error back saying that this is an invalid function.

eg)
<?php
   include "../includes/aClass.class";

   $myArray = array("item1"=>"firstItem", "item2"=>"secondItem");
   $myClass = new aClass;

   array_walk($myArray,'$myClass->aMemberFunction');
?>

As a workaround, I redifined the class so that there was a public 
function which made the array_walk call with the worker function defined 
internally as follows, but this throws another issue in that if I create 
multiple instances of the class then I get an error to say that the 
internal function is already defined ...

> *Fatal error*: Cannot redeclare aFunction() (previously declared in 
> /usr/local/apache2/htdocs/includes/functions.php:23) in 
> */usr/local/apache2/htdocs/includes/functions.php* on line *23*

class aClass
{
    some other stuff, constructor etc
   public function aPublicFunction($anArray)
   {
      global $aRetrunString;
     
      function aFunction($value, $key)
      {
           global $aReturnString;
           $aReturnString = $aReturnString.$value;         
      }

      array_walk($anArray,'aFunction');
      return $aReturnString;
   }
}

  
Can anyone help me to get either solution to a working state?

By the way...
apache 2.0.49
php-5.0.2

Thanks very much

Tom

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