WordPress pagination, based on WP-Pagenavi

pagination.php

<?php

### Function: Page Navigation
function wp_pagination($before = '', $after = '') {
	global $wpdb, $wp_query;
	if (!is_single()) {
		$request = $wp_query->request;
		$posts_per_page = intval(get_query_var('posts_per_page'));
		$paged = intval(get_query_var('paged'));
		$numposts = $wp_query->found_posts;
		$max_page = $wp_query->max_num_pages;
		if(empty($paged) || $paged == 0) {
			$paged = 1;
		}
		$always_show = 1;
		$pages_to_show = 5;
		$pages_to_show_minus_1 = $pages_to_show - 1;
		$half_page_start = floor($pages_to_show_minus_1/2);
		$half_page_end = ceil($pages_to_show_minus_1/2);
		$start_page = $paged - $half_page_start;
		if($start_page <= 0) {
			$start_page = 1;
		}
		$end_page = $paged + $half_page_end;
		if(($end_page - $start_page) != $pages_to_show_minus_1) {
			$end_page = $start_page + $pages_to_show_minus_1;
		}
		if($end_page > $max_page) {
			$start_page = $max_page - $pages_to_show_minus_1;
			$end_page = $max_page;
		}
		if($start_page <= 0) {
			$start_page = 1;
		}

		if($max_page > 1 || $always_show == 1) {
			$pages_text = 'Page '.$paged.' of '.$max_page;
			echo $before.'<ul class="pagination">'."\n";

					if(!empty($pages_text)) {
						echo '<li class="pages"><span>'.$pages_text.'</span></li>';
					}
					if ($start_page >= 2 && $pages_to_show < $max_page) {
						echo '<li class="first"><a href="'.clean_url(get_pagenum_link()).'" title="&laquo; First">&laquo; First</a></li>';
						echo '<li class="extend"><span>...</span></li>';
					}
					if(get_previous_posts_link()) echo '<li class="prev">'.get_previous_posts_link('&laquo;').'</li>';
					for($i = $start_page; $i  <= $end_page; $i++) {						
						if($i == $paged) {
							echo '<li class="current"><span>'.$i.'</span></li>';
						} else {
							echo '<li class="page"><a href="'.clean_url(get_pagenum_link($i)).'" title="'.$i.'">'.$i.'</a></li>';
						}
					}
					if(get_next_posts_link()) echo '<li class="next">'.get_next_posts_link('&raquo;').'</li>';
					if ($end_page < $max_page) {
						echo '<li class="extend"><span>...</span></li>';
						echo '<li class="last"><a href="'.clean_url(get_pagenum_link($max_page)).'" title="Last &raquo;">Last &raquo;</a></li>';
					}

			echo '</ul>'.$after."\n";
		}
	}
}

?>