// Add custom tab in ultimate member account page.

gistfile1.txt

// Add custom tab in ultimate member account page.

// global $form_id;
// $form_id = 26;

/**
 * Add custom tabs.
 *
 * @param  array $tabs Account tabs.
 * @return array
 */
function um_account_custom_tabs( $tabs ) {
	$tabs[ 150 ][ 'custom_tab_01' ] = array(
		'icon'         => 'um-faicon-plus',
		'title'        => __( 'Custom fields', 'um-woocommerce' ),
		'submit_title' => __( 'Save', 'um-woocommerce' ),
		'custom'       => true,
	);
	return $tabs;
}
add_filter( 'um_account_page_default_tabs_hook', 'um_account_custom_tabs', 100 );


/**
 * Add custom tab content.
 *
 * @param  string $output Tab content.
 * @return string
 */
function um_account_content_custom_tab_01( $output = '' ) {

	// List of fields you want to display.
	$fields = get_all_custom_fields('26');

	ob_start();

	foreach( $fields as $key ) {
		$data = UM()->builtin()->get_a_field( $key );
		echo UM()->fields()->edit_field( $key, $data );
	}
	return ob_get_clean();
}
add_filter( 'um_account_content_hook_custom_tab_01', 'um_account_content_custom_tab_01', 20 );


/**
 * Validate custom fields.
 *
 * @param array $post_args Input data.
 */
function um_account_errors_custom_tab_01( $post_args ) {
	if( ! isset( $post_args[ 'um_account_submit' ] ) ) {
		return;
	}

	// List of fields you want to validate.
	$fields = get_all_custom_fields('26');

	foreach( $fields as $key ) {
		$data = UM()->builtin()->get_a_field( $key );
		if( empty( $post_args[ $key ] ) && ! empty( $data['required'] ) ) {
			UM()->form()->add_error( $key, __( 'This field is required.', 'ultimate-member' ) );
		}
	}
}
add_action( 'um_submit_account_errors_hook', 'um_account_errors_custom_tab_01', 20 );


/**
 * Save custom fields.
 *
 * @param int $user_id User ID.
 */
function um_account_update_custom_tab_01( $user_id ) {

	// List of fields you want to update.
	$fields = get_all_custom_fields('26');

	foreach( $fields as $key ) {
		if( isset( $_POST[ $key ] ) && ! UM()->form()->has_error( $key ) ) {
			update_user_meta( $user_id, $key, wp_unslash( $_POST[ $key ] ) );
		}
	}
}
add_action( 'um_after_user_account_updated', 'um_account_update_custom_tab_01', 8 );

// remove element in array if type equal number
function remove_element_by_type($array, $type) {
	foreach ($array as $key => $value) {
		if ($value['type'] == $type) {
			unset($array[$key]);
		}
	}
	return $array;
}

// get all custom fields
function get_all_custom_fields($form_id = null) {
	$custom_fields = UM()->query()->get_attr( 'custom_fields', $form_id );
	$custom_fields = remove_element_by_type($custom_fields, 'row');
	// get all key in array
	$custom_fields = array_keys($custom_fields);
	return $custom_fields;
}