Magic method __call() like function for global scope

[varunajani]

If a call is made to an undefined method in a class, the magic method __call can intercept the call, so I could handle the situation as I see fit:
http://www.php.net/manual/en/language.oop5.o verloading.php# language.oop5.o verloading.meth ods

Is there any mechanism provided in php whereby I can do the same thing with functions in global scope.
The point is best illustrated with code:

<?php
function return_some_array(){
  $a = array();
  //Do stuff to array
  return array();
}
 
// Now i call the function like so:
$give_me_array = return_some_array();
 
// But sometimes I want the array to not contain zeroes, nulls etc.
// so I call: 
$give_me_array_filtered = return_some_array_filtered();
 
// But i haven't defined return_some_array_filtered() anywhere.
// Instead I would like to do something like so: 
function __magic_call($function_name_passed_automatically){ 
  preg_match('/(.*)_filtered$/', $function_name_passed_automatically, $matches);
  $function_name_that_i_defined_earlier_called_return_some_array = $matches[1];
  if($matches){
    $result = call_user_func($function_name_that_i_defined_earlier_called_return_some_array);
    $filtered = array_filter($result);
    return $filtered;
  }
}

//So now, I could call return_some_other_array_filtered() and it would work provided I had defined return_some_other_array().
//Or even Donkey_filtered() would work, provided I had defined Donkey() somewhere.
?>

Is this at all possible?

[Dormilich]

Is there any mechanism provided in php whereby I can do the same thing with functions in global scope.

nope, there isn‘t.