: str_replace(): Passing null to parameter #2 ($replace) of type array|string is deprecated in
<?php if ( ! defined( 'ABSPATH' ) ) exit;
final class NF_AJAX_Requests_DeleteField extends WP_Async_Request
protected $action = 'nf_delete_field';
protected function handle() {
if( ! isset( $_POST[ 'field_id' ] ) ) return;
$field = Ninja_Forms()->form()->get_field(absint($_POST['field_id']));