Reply To: Filter field when saving

• timothyf

• May 4, 2016 at 5:47 am

I very well understand the futility of filtering–just call me Sisyphus.

I’m making progress–I decided to simplify, and wrote this code that works on a page with a non-repeater ACF field:

add_filter('acf/update_value', 'my_acf_update_value', 10, 3);
function my_acf_update_value( $value, $post_id, $field ) {
	$value .= ' added by filter';
	return $value;
}

Then I tried on a page with an ACF repeater–>crash with “Warning: Invalid argument supplied for foreach() in … /plugins/advanced-custom-fields-pro/pro/fields/repeater.php on line 722”

Can you point me towards how to make this work for both single fields and repeater subfields?

Thanks!