group-shortcode-chatgpt.php

<?php
function cornerstone_group_leaders_shortcode() {
    global $post;

    $post_id = $post->ID;

    // Retrieve the leader post IDs for the current post ID
    $leader_ids = get_post_meta( $post_id, 'leaders', true );

    // Generate the output
    $output = '';

    if ( ! empty( $leader_ids ) ) {
        $output .= '<ul>';

        foreach ( (array) $leader_ids as $leader_id ) {
            $leader_name = get_the_title( $leader_id );

            if ( $leader_name ) {
                $output .= '<li>' . esc_html( $leader_name ) . '</li>';
            }
        }

        $output .= '</ul>';
    } else {
        $output .= '<div class="admin-visible">No group leaders found for this post.</div>';
    }

    return $output;
}
add_shortcode( 'cornerstone-group-leaders', 'cornerstone_group_leaders_shortcode' );