WordPress Pagination Function v1.00a

/**
 * WordPress Pagination
 * If you need pagination for a custom query, insert it into the function as a parameter.
 *
 * Modified version of the snippet found here: http://wp-snippets.com/pagination-without-plugin/
 *
 * @version v1.00a
 * @global $wp_query
 * @param object $query optional custom query
 * @return void
 * @author Kenth Hagström <info@kenthhagstrom.se>
 * @link http://kenthhagstrom.se
 */
function keha76_pagination( $query = '' ) {

    if ( ! is_object( $query ) ) {
        global $wp_query;
        $query = $wp_query;
    }

    $current = ( get_query_var('paged') ) ? get_query_var('paged') : 1;

    if ( get_option('permalink_structure') ) {
        $format = 'page/%#%';
    } else {
        $format = '?paged=%#%';
        if ( ! is_home() )
            $format = '&paged=%#%';
    }

    if ( $query->max_num_pages > 1 ) {

        $defaults = array(
            'base'         => str_replace( PHP_INT_MAX, '%#%', esc_url( get_pagenum_link() ) ),
            'format'       => $format,
            'total'        => $query->max_num_pages,
            'current'      => max( 1, $current ),
            'show_all'     => false,
            'end_size'     => 1,
            'mid_size'     => 3,
            'prev_next'    => true,
            'prev_text'    => __( 'Prev', 'kah76' ),
            'next_text'    => __( 'Next', 'kah76' ),
            'type'         => 'plain',
            'add_args'     => false,
            'add_fragment' => ''
        );

        $args = wp_parse_args( apply_filters( 'keha76_pagination_parameters', $defaults ) );
        echo paginate_links( $args );
    }
}