YA: Displaying Maximum Number of Online Users

<?php

// If $users is an array:

function wpwhosonline_list_authors() {
    $users = wpwhosonline_recents();
    $maxNumUsers = 50; // The maximum number of users you wish to display
    $users = array_slice($users, 0, $maxNumUsers);
    $html = '<ul id="wpwhosonline-">';

    foreach( $users as $user ) {
        $last_online_ts = get_user_meta( $user->ID, 'wpwhosonline_timestamp', true );
        $item = wpwhosonline_user( $last_online_ts, $user );
        $class = wpwhosonline_class( $last_online_ts );
        $html .= '<li id="wpwhosonline' . $user->ID . '" class="wpwhosonline-row ' . $class . '" data-wpwhosonline="' .
        esc_attr( $last_online_ts ) . '">' . $item . '</li>';
    }
    $html .= '</ul>';
    echo $html;
}



// If $users is not an array

function wpwhosonline_list_authors() {
    $users = wpwhosonline_recents();
    $maxNumUsers = 50; // The maximum number of users you wish to display
    $html = '<ul id="wpwhosonline-">';
    $i = 0;
    foreach( $users as $user ) {
        $last_online_ts = get_user_meta( $user->ID, 'wpwhosonline_timestamp', true );
        $item = wpwhosonline_user( $last_online_ts, $user );
        $class = wpwhosonline_class( $last_online_ts );
        $html .= '<li id="wpwhosonline' . $user->ID . '" class="wpwhosonline-row ' . $class . '" data-wpwhosonline="' .
        esc_attr( $last_online_ts ) . '">' . $item . '</li>';
        if($i++ === $maxNumUsers){
            echo $html . '</ul>';
            return true;
        }
    }
    $html .= '</ul>';
    echo $html;
}

?>