Wordpress pagination trick

<?php // Post Paging if ( is_singular() && get_query_var('page') && ( !is_front_page() || ( isset($wp_query->queried_object) && 'page' == get_option('show_on_front') && $wp_query->queried_object->ID == get_option('page_on_front') ) ) ) { if ( !$redirect_url ) $redirect_url = get_permalink( get_queried_object_id() ); $page = get_query_var( 'page' ); if ( is_front_page() ) { $redirect_url = trailingslashit( $redirect_url ) . user_trailingslashit( "$wp_rewrite->pagination_base/$page", 'paged' ); } else { $redirect_url = trailingslashit( $redirect_url ) . user_trailingslashit( $page, 'single_paged' ); } $redirect['query'] = remove_query_arg( 'page', $redirect['query'] ); }