Custom shortcode to show member expiration dates or recurring. [show_enddate]

my-show-user-enddate.php

<?php
/**
 * Show the user's expiration date, or their next payment date.
 * [show_enddate] ( show end date, show enddate, show_endate )
 * Show the user's previously expired date if they were cancelled, expired or cancelled by an admin.
 * If none of thhe above is found, the string 'nothing found' will be returned.
 *
 * 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_show_user_enddate() {

	if ( is_user_logged_in() && function_exists( 'pmpro_hasMembershipLevel' ) && pmpro_hasMembershipLevel() ) {
			global $current_user;

		$current_user->membership_level = pmpro_getMembershipLevelForUser( $current_user->ID );
		$user_enddate                   = $current_user->membership_level->enddate;

		if ( ! $user_enddate == 0 ) {
			return 'Membership end date: ' . date( 'd-m-Y', $user_enddate );
		} else {
			// See if membership is recurring.

			$recurring = date( 'F j, Y', pmpro_next_payment( $current_user->ID ) );
			if ( $recurring ) {
				return $recurring;
			} else {
				return 'Membership never expires.';
			}
		}
	} elseif ( ! pmpro_hasMembershipLevel() ) {
		//try to see if they had a previous membership level.
		global $wpdb, $current_user;

		$sql = "SELECT enddate FROM $wpdb->pmpro_memberships_users WHERE `user_id` = $current_user->ID AND `status` in ('cancelled', 'expired', 'admin_cancelled') ORDER BY enddate ASC LIMIT 1";

		$results = $wpdb->get_results( $sql );

		if ( ! empty( $results[0] ) ) {

			$enddate      = explode( ' ', $results[0]->enddate );
			$user_enddate = strtotime( $enddate[0] );

			return date( 'F j, Y', $user_enddate );

		} else {
			return 'nothing found';
		}
	}
}
add_shortcode( 'show_enddate', 'my_show_user_enddate' );