I can’t be the only person who’s ever wanted proper navigation on Wordpress date.php archive pages. By this, I mean that if you’re browsing, say, http://sachachua.com/wp/2009 and you’re on the first page, there should be a way for you to get to 2008.
So I spent a couple of hours hacking that in. This even skips non-existent years/months/days. Tweak and enjoy.
Minor notes: It jumps to the first page of the other year/month/day, so the results aren’t strictly chronological. Going to 2008 from 2009 will show you the blog posts from January 1 instead of the last posts of 2008. Since I display a huge list of posts and I only use one page, that’s fine with me.
<?php
$y = mysql2date('Y', $wp_query->posts[0]->post_date);
$m = mysql2date('m', $wp_query->posts[0]->post_date);
$d = mysql2date('d', $wp_query->posts[0]->post_date);
$display = mktime(0, 0, 0, $m, $d, $y);
if (is_year()) {
$format = 'Y';
$prev_display = mktime(23, 59, 59, 12, 31, $y - 1);
$next_display = mktime(0, 0, 0, 1, 1, $y + 1);
$url_format = 'Y';
} elseif (is_month()) {
$prev_display = mktime(23, 59, 59, $m, 0, $y);
$next_display = mktime(0, 0, 0, $m + 1, 1, $y);
$format = 'F Y';
$url_format = 'Y/M';
} elseif (is_day()) {
$prev_display = mktime(23, 59, 59, $m, $d - 1, $y);
$next_display = mktime(0, 0, 0, $m, $d + 1, $y);
$format = 'F j, Y';
$url_format = 'Y/M/j';
}
$paged = get_query_var('paged');
if ($paged < 2) { $past = $wpdb->get_row("SELECT UNIX_TIMESTAMP(MAX(post_date)) AS post_date
FROM $tableposts WHERE post_date <= FROM_UNIXTIME($prev_display) AND post_status='publish'");
if ($past->post_date) {
$prev_text = '« ' . date($format, $past->post_date);
$prev_link = get_bloginfo('url') . '/'
. date($url_format, $past->post_date);
}
}
if ($paged >= $wp_query->max_num_pages) { $future = $wpdb->get_row("SELECT UNIX_TIMESTAMP(MIN(post_date)) AS post_date
FROM $tableposts WHERE post_date >= FROM_UNIXTIME($next_display) AND post_status='publish'");
if ($future->post_date) {
$next_text = date($format, $future->post_date) . ' »';
$next_link = get_bloginfo('url') . '/'
. date($url_format, $future->post_date);
}
}
$title = date($format, $display);
?>
<div class="navigation">
<div class="left">
<?php if ($prev_text) { ?>
<a href="<?php print $prev_link ?>"><?php print $prev_text ?></a>
<?php } else { ?>
<?php previous_posts_link('« Older posts'); ?>
<?php } ?>
</div>
<div class="right">
<?php if ($next_text) { ?>
<a href="<?php print $next_link ?>"><?php print $next_text ?></a>
<?php } else { ?>
<?php next_posts_link('Newer posts »'); ?>
<?php } ?>
</div>
<div style="clear: both"></div>
</div>
<h1><?php print $title ?></h1>
