Display the sponsored users of a sponsor with a shortcode for PMPro Sponosored Members. [pmpro_sponsored_children]

pmpro-sponsor-child.php

<?php
/**
 * Add a shortcode to display a list of sponsored children.
 *
 * @param array $atts {
 *     Attributes for the shortcode.
 *
 *     @type int $user_id The user ID of the sponsor.
 * }
 *
 * @return string $html The HTML output for the shortcode.
 *
 * You can add this recipe to your site by creating a custom plugin
 * or using the Code Snippets plugin available for free in the WordPress repository.
 * Read this companion article for step-by-step directions on either method.
 * https://www.paidmembershipspro.com/create-a-plugin-for-pmpro-customizations/
 */

function my_pmpro_sponsored_children_shortcode( $atts ) {
	// Get shortcode attributes.
	$atts = shortcode_atts(
		array(
			'user_id' => get_current_user_id(),
		),
		$atts,
		'pmpro_sponsored_children'
	);

	// Get the user ID.
	$user_id = intval( $atts['user_id'] );

	// bail if required function or user_id is not set.
	if ( ! function_exists( 'pmprosm_getChildren' ) || empty( $user_id ) ) {
		return '';
	}

	$sponsored_ids = pmprosm_getChildren( $user_id );

	if ( empty( $sponsored_ids ) ) {
		return '';
	}

	$sponsored_list = new WP_User_Query(
		array(
			'include' => $sponsored_ids,
			'orderby' => 'name',
			'order'   => 'ASC',
		)
	);

	$sponsored_members = $sponsored_list->get_results();

	if ( ! empty( $sponsored_members ) ) {
		$html  = '<strong>Sponsored Members</strong>';
		$html .= '<ul>';
		foreach ( $sponsored_members as $sponsored_member ) {
			$html .= '<li>' . esc_html( $sponsored_member->data->display_name ) . '</li>';
		}
		$html .= '</ul>';
	}

	return $html;

}
add_shortcode( 'pmpro_sponsored_children', 'my_pmpro_sponsored_children_shortcode' );