اضافه کردن pagination در وردپرس بدون افزونه

function my_pagination() {
    if( is_singular() )
        return;
    global $wp_query;
    if( $wp_query->max_num_pages <= 1 )
        return;
    $paged = get_query_var( 'paged' ) ? absint( get_query_var( 'paged' ) ) : 1;
    $max   = intval( $wp_query->max_num_pages );
    if ( $paged >= 1 )
        $links[] = $paged;
    if ( $paged >= 3 ) {
        $links[] = $paged - 1;
        $links[] = $paged - 2;
    }
    if ( ( $paged + 2 ) <= $max ) {
        $links[] = $paged + 2;
        $links[] = $paged + 1;
    }
    echo '<div class="pagination nav"><ul class="navbar" style="list-syle:none;">' . "\n";
    if ( get_previous_posts_link() )
        printf( '<li class="btn btn-primary text-light">%s</li>' . "\n", get_previous_posts_link() );
    if ( ! in_array( 1, $links ) ) {
        $class = 1 == $paged ? ' class="active"' : '';
        printf( '<li%s class="nav-item"><a class="btn btn-primary" href="%s">%s</a></li>' . "\n", $class, esc_url( get_pagenum_link( 1 ) ), '1' );
        if ( ! in_array( 2, $links ) )
            echo '<li>…</li>';
    }
    sort( $links );
    foreach ( (array) $links as $link ) {
        $class = $paged == $link ? ' class="active"' : '';
        printf( '<li%s class="nav-item"><a class="btn btn-primary" href="%s">%s</a></li>' . "\n", $class, esc_url( get_pagenum_link( $link ) ), $link );
    }
    if ( ! in_array( $max, $links ) ) {
        if ( ! in_array( $max - 1, $links ) )
            echo '<li class="nav-item btn btn-primary">…</li>' . "\n";
        $class = $paged == $max ? ' class="active"' : '';
        printf( '<li%s class="nav-item"><a class="btn btn-primary" href="%s">%s</a></li>' . "\n", $class, esc_url( get_pagenum_link( $max ) ), $max );
    }
    if ( get_next_posts_link() )
        printf( '<li class="btn btn-primary text-light">%s</li>' . "\n", get_next_posts_link() );
    echo '</ul></div>' . "\n";
}

<?php echo my_pagination(); ?>