: str_replace(): Passing null to parameter #2 ($replace) of type array|string is deprecated in
<?php if ( ! defined( 'ABSPATH' ) ) exit;
final class NF_Admin_Metaboxes_Example extends NF_Abstracts_SubmissionMetabox
public function __construct()
// $this->_title = esc_html__( 'Example Metabox', 'ninja-forms' );
public function render_metabox( $post, $metabox )
$data = $this->sub->get_field_values();
Ninja_Forms()->template( 'admin-metabox-submission-example.php', compact( 'data' ) );