Pagination function

<?php

// Function uses Bootstrap mark-up for pagination, cf. https://fellowtuts.com/bootstrap/wordpress-pagination-bootstrap-4-style/

function fellowtuts_wpbs_pagination($pages = '', $range = 7) // Sets number of numbers to use in paginator
{
 $showitems = ($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 '<nav aria-label="Page navigation" role="navigation" class="pt-2">';
        echo '<span class="sr-only">Page navigation</span>';
        echo '<ul class="pagination justify-content-center ft-wpbs">';

        echo '<li class="page-item disabled hidden-md-down d-none d-lg-block"><span class="page-link">Page '.$paged.' of '.$pages.'</span></li>';

 if($paged > 2 && $paged > $range+1 && $showitems < $pages)
 echo '<li class="page-item"><a class="page-link" href="'.get_pagenum_link(1).'" aria-label="First Page">&laquo;</a></li>';

 if($paged > 1 && $showitems < $pages)
 echo '<li class="page-item"><a class="page-link" href="'.get_pagenum_link($paged - 1).'" aria-label="Previous Page">&lsaquo;</a></li>';

 for ($i=1; $i <= $pages; $i++)
 {
     if (1 != $pages &&( !($i >= $paged+$range+1 || $i <= $paged-$range-1) || $pages <= $showitems ))
 echo ($paged == $i)? '<li class="page-item active"><span class="page-link">'.$i.'</span></li>' : '<li class="page-item"><a class="page-link" href="'.get_pagenum_link($i).'"><span class="sr-only">Page </span>'.$i.'</a></li>';
 }

 if ($paged < $pages && $showitems < $pages)
 echo '<li class="page-item"><a class="page-link" href="'.get_pagenum_link($paged + 1).'" aria-label="Next Page">&rsaquo;</a></li>';

 if ($paged < $pages-1 &&  $paged+$range-1 < $pages && $showitems < $pages)
 echo '<li class="page-item"><a class="page-link" href="'.get_pagenum_link($pages).'" aria-label="Last Page">&raquo;</a></li>';

 echo '</ul>';
        echo '</nav>';
        // echo '<div class="pagination-info mb-5 text-center">[ <span class="text-muted">Page</span> '.$paged.' <span class="text-muted">of</span> '.$pages.' ]</div>';
 }
}

?>