Custom pagination code for shortcode wordpress

pagination.php

function sponsor_pagination($pages = '', $range = 4)
    {
        $showitems = ($range * 2)+1;
    
        global $paged;
        if(empty($paged)) $paged = 1;
    
        if($pages == '')
        {
            global $wp_query;
            $pages = $wp_query->max_num_pages;
            if(!$pages)
            {
                $pages = 1;
            }
        }
    
        if(1 != $pages)
        {
            echo "<div class=\"sponsor_pagination\"><span>Page </span>";
            if($paged > 2 && $paged > $range+1 && $showitems < $pages) echo "<a href='".get_pagenum_link(1)."'>&laquo; First</a>";
            if($paged > 1 && $showitems < $pages) echo "<a href='".get_pagenum_link($paged - 1)."'>&lsaquo; Previous</a>";
    
            for ($i=1; $i <= $pages; $i++)
            {
                if (1 != $pages &&( !($i >= $paged+$range+1 || $i <= $paged-$range-1) || $pages <= $showitems ))
                {
                    echo ($paged == $i)? "<span class=\"current\">".$i."</span>":"<a href='".get_pagenum_link($i)."' class=\"inactive\">".$i."</a>";
                }
            }
    
            if ($paged < $pages && $showitems < $pages) echo "<a href=\"".get_pagenum_link($paged + 1)."\">Next &rsaquo;</a>";
            if ($paged < $pages-1 &&  $paged+$range-1 < $pages && $showitems < $pages) echo "<a href='".get_pagenum_link($pages)."'>Last &raquo;</a>";
            echo "</div>\n";
        }
    }