WordPress Pagination function

functions.php

/**
 * A pagination function
 * @param integer $range: The range of the slider, works best with even numbers
 * Used WP functions:
 * get_pagenum_link($i) - creates the link, e.g. http://site.com/page/4
 * previous_posts_link(' ‚ '); - returns the Previous page link
 * next_posts_link(' é '); - returns the Next page link
 * http://robertbasic.com/blog/wordpress-paging-navigation/
 * Tweaked by tdB ...
 */
function get_pagination($range = 4) {
	global $paged, $wp_query;

	// How much pages do we have?
	if ( !$max_page ) {
		$max_page = $wp_query->max_num_pages;
	}

	// We need the pagination only if there is more than 1 page
	if ( $max_page > 1 ) {
		if ( !$paged ) $paged = 1;

		echo '<div class="postpagination">';

		// To the previous page
		previous_posts_link('Prev');

		if ( $max_page > $range + 1 ) :
			if ( $paged >= $range ) echo '<a href="' . get_pagenum_link(1) . '">1</a>';
			if ( $paged >= ($range + 1) ) echo '<span class="page-numbers">&hellip;</span>';
		endif;

		// We need the sliding effect only if there are more pages than is the sliding range
		if ( $max_page > $range ) {
			// When closer to the beginning
			if ( $paged < $range ) {
				for ( $i = 1; $i <= ($range + 1); $i++ ) {
						echo ( $i != $paged ) ? '<a href="' . get_pagenum_link($i) .'">'.$i.'</a>' : '<span class="this-page">'.$i.'</span>';
				}
			// When closer to the end
			} elseif ( $paged >= ($max_page - ceil(($range/2))) ) {
				for ( $i = $max_page - $range; $i <= $max_page; $i++ ) {
					echo ( $i != $paged ) ? '<a href="' . get_pagenum_link($i) .'">'.$i.'</a>' : '<span class="this-page">'.$i.'</span>';
				}
			// Somewhere in the middle
			} elseif ( $paged >= $range && $paged < ($max_page - ceil(($range/2))) ) {
				for ( $i = ($paged - ceil($range/2)); $i <= ($paged + ceil(($range/2))); $i++ ) {
					echo ($i != $paged) ? '<a href="' . get_pagenum_link($i) .'">'.$i.'</a>' : '<span class="this-page">'.$i.'</span>';
				}
			}
		// Less pages than the range, no sliding effect needed
		} else {
			for ( $i = 1; $i <= $max_page; $i++ ) {
					echo ($i != $paged) ? '<a href="' . get_pagenum_link($i) .'">'.$i.'</a>' : '<span class="this-page">'.$i.'</span>';
				}
		}
		if ( $max_page > $range + 1 ) :
			// On the last page, don't put the Last page link
			if ( $paged <= $max_page - ($range - 1) ) echo '<span class="page-numbers">&hellip;</span><a href="' . get_pagenum_link($max_page) . '">' . $max_page . '</a>';
		endif;

		// Next page
		next_posts_link('Next');

		echo '</div><!-- postpagination -->';
	}
}

style.css

.postpagination {
    clear: both;
    margin: 20px 10px;
    line-height: 2.1em;
    font-size: 1.2em;
    text-align: right;
}
    .postpagination span {
        padding: 6px 10px;
    }
    .postpagination a {
        padding: 6px 10px;
        margin: 0 6px;
        border: 1px solid #ddd;
        text-decoration: none;
    }
    .postpagination a:hover {
        border-color: #fff;
    }