Using wpcf7_validate_ with foreach

Hi,

is it possible for someone to perform a custom validation using the wpcf7_validate_text filter for multiple text fields within the same function?

Something like:

add_filter( 'wpcf7_validate_text', 'cd_form_cond_val_texts', 20, 2 );
function cd_form_cond_val_texts( $result, $tag ) {
	$tag = new WPCF7_Shortcode( $tag );
	$strings = array('old-street',
					 'old-street-number',
					 'old-post-code',
					 'old-city',
					 'old-country',
					 'new-street',
					 'new-street-number',
					 'new-post-code',
					 'new-city',
					 'new-country');
		foreach($strings as $string) {
			if (isset($_POST['cd-form-check-3']) && "your-{$string}" == $tag->name ) {
				if (empty($_POST['your-{$string}'])) {
				$result->invalidate( $tag, "xxxxxxxxx" );
				}
			}

		}
	return $result;
}

This did return the xxxxxxxxx text for all fields defined in the array but actual validation did not work..
Many thanks,
Harry

https://wordpress.org/plugins/contact-form-7/