Write a PHP function to change the following array's all values to upper or lower case

<?php
function array_change_value_case($input, $ucase)
{
$case = $ucase;
$narray = array();
if (!is_array($input))
{
return $narray;
}
foreach ($input as $key => $value)
{
if (is_array($value))
{
$narray[$key] = array_change_value_case($value, $case);
 continue;
}
$narray[$key] = ($case == CASE_UPPER ? strtoupper($value) : strtolower($value));
}
return $narray;
}
$Color = array('A' => 'Blue', 'B' => 'Green', 'c' => 'Red');
echo 'Actual array ';
print_r($Color);
echo 'Values are in lower case.';
$myColor = array_change_value_case($Color,CASE_LOWER);
print_r($myColor);
echo 'Values are in upper case.';
$myColor = array_change_value_case($Color,CASE_UPPER);
print_r($myColor);
?>

Sample Output:

Actual array Array                                          
(                                                           
    [A] => Blue                                             
    [B] => Green                                            
    [c] => Red                                              
)                                                           
Values are in lower case.Array                              
(                                                           
    [A] => blue                                             
    [B] => green                                            
    [c] => red                                              
)                                                           
Values are in upper case.Array                              
(                                                           
    [A] => BLUE                                             
    [B] => GREEN                                            
    [c] => RED                                              
)