global $WishListMemberInstance;

        $post_id = 107;

        // Returns true if PayPerPost is enabled, false if not
        $is_pay_per_post = $WishListMemberInstance->PayPerPost($post_id);
        var_dump($is_pay_per_post);
        echo '<hr>';

        // Returns number of people who have purchased post.
        $ContentType = 'posts';
        $post_id = 107;

        $wpm_access = array_flip($WishListMemberInstance->GetContentLevels($ContentType, $post_id));

        $user_access      = array_keys( $wpm_access );
        foreach ( $user_access AS $key => $user ) {
            if ( substr( $user, 0, 2 ) != 'U-' ) {
                unset( $user_access[$key] );
            } else {
                $user = get_userdata( substr( $user, 2 ) );
                if ( $user ) {
                    $name = trim( $user->user_firstname . ' ' . $user->user_lastname );
                    if ( ! $name ) {
                        $name = $user->user_login;
                    }
                    $user_access[$key] = array(
                        $user->ID,
                        $name,
                        $user->user_login,
                        $user->user_email
                    );
                } else {
                    unset( $user_access[$key] );
                }
            }
        }

        echo count( $user_access );