How to check successful copy() function execution in php?

I am using the following code:

<?
function full_copy( $source, $target ) {
    if ( is_dir( $source ) ) {
        @mkdir( $target );
        $d = dir( $source );
        while ( FALSE !== ( $entry = $d->read() ) ) {
            if ( $entry == '.' || $entry == '..' ) {
                continue;
            }
            $Entry = $source . '/' . $entry; 
            if ( is_dir( $Entry ) ) {
                full_copy( $Entry, $target . '/' . $entry );
                continue;
            }
            copy( $Entry, $target . '/' . $entry );
        }

        $d->close();
    }else {
        copy( $source, $target );
    }
}

$source ='.';
$destination = '/html/parth/';
full_copy($source, $destination);
?>

I do not get anything in my parth folder. Why? I am using Windows, Script is executed on fedora system (its my server)...