Add pagination to WordPress posts/pages - this example us using the Roots theme.

Add pagination to WordPress

/*--- add to functions/custom.php */

/* ---------------------------------- custom pagination for posts -----*/

function j72_pagination($pages = '', $range = 2)
{  
     $showitems = ($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 != $pages)
     {
         echo "<div class='pagination'>";
         if($paged > 2 && $paged > $range+1 && $showitems < $pages) echo "<a href='".get_pagenum_link(1)."'>&laquo;</a>";
         if($paged > 1 && $showitems < $pages) echo "<a href='".get_pagenum_link($paged - 1)."'>&lsaquo;</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)."'>&rsaquo;</a>";  
         if ($paged < $pages-1 &&  $paged+$range-1 < $pages && $showitems < $pages) echo "<a href='".get_pagenum_link($pages)."'>&raquo;</a>";
         echo "</div>\n";
     }
}

/*-- replace current pagination - found in index.php in Roots theme - with this */

<?php j72_pagination(); ?>

/* --- add to css file and style to suit */

/*-- pagination --*/

.pagination {
clear:both;
padding:20px 0;
position:relative;
}

.pagination span, .pagination a {
display:block;
float:left;
margin: 2px 2px 2px 0;
padding:5px 10px;
text-decoration:none;
width:auto;
color:#fff;
background: #555;
}

.pagination a:hover{
background: #cb5234;
}

.pagination .current{
background: #64C1C4;
}