[Forminator] Omit field on email notifications.

wpmudev-forminator-omit-field-from-email.php

<?php
/**
 * Plugin Name: [Forminator] Omit "none" on email notifications.
 * Plugin URI: https://premium.wpmudev.org/
 * Description: Omit the "select" field type in email notifications if the selected value is "none".
 * Author: Glauber Silva @ WPMUDEV
 * Author URI: https://premium.wpmudev.org/
 * Task: 0/11289012348292/1168248790047528
 * License: GPLv2 or later
 *
 * @package Forminator_omit_none_on_email_notifications
 */

defined( 'ABSPATH' ) || exit;

/**
 * Message data filter - This filter is present in: plugins/forminator/library/modules/custom-forms/front/front-mail.php
 *
 * @since 1.0.4
 *
 * @param array                        $data        - the post data.
 * @param Forminator_Custom_Form_Model $custom_form - the form.
 * @param Forminator_Form_Entry_Model  $entry       - saved entry @since 1.0.3.
 *
 * @return array $data
 */
function wpmudev_omit_none_on_email_notifications( $data, $custom_form, $entry ) {
	$fields_list = array( 'select', 'checkbox', 'radio' );
	foreach ( $custom_form->fields as $key_field => $value_field ) {
		if ( array_key_exists( $value_field->slug, $data ) && in_array( $value_field->raw['type'], $fields_list, true ) ) {
			if ( is_array( $data[ $value_field->slug ] ) && 1 === count( $data[ $value_field->slug ] ) && strpos( strtolower( $data[ $value_field->slug ][0] ), 'none' ) !== false ) {
				unset( $custom_form->fields[ $key_field ] );
			} elseif ( is_array( $data[ $value_field->slug ] ) ) {
				foreach ( $data[ $value_field->slug ] as $key_array => $value_array ) {
					if ( strpos( strtolower( $value_array ), 'none' ) !== false ) {
						unset( $entry->meta_data[ $value_field->slug ]['value'][ $key_array ] );
					}
				}
			} elseif ( strpos( strtolower( $data[ $value_field->slug ] ), 'none' ) !== false ) {
				unset( $custom_form->fields[ $key_field ] );
			}
		} elseif ( in_array( $value_field->raw['type'], $fields_list, true ) ) {
			unset( $custom_form->fields[ $key_field ] );
		}
	}

	return $data;
}
add_filter( 'forminator_custom_form_mail_data', 'wpmudev_omit_none_on_email_notifications', 999, 3 );