ежемесячный график времени для WordPress

<?php get_header(); query_posts('posts_per_page=-1');
$dates_array 			= Array();
$year_array 			= Array();
$i 				= 0;
$prev_post_ts    		= null;
$prev_post_year  		= null;
$distance_multiplier 	        = 2;
?>

<?php while (have_posts()) : the_post();

$post_ts    =  strtotime($post->post_date);
$post_year  =  date( 'Y', $post_ts );

/* Handle the first year as a special case */
if ( is_null( $prev_post_year ) ) {
?>
<h3 class="archive_year"><?=$post_year?></h3>
<ol class="archives_list">
<?php
}
else if ( $prev_post_year != $post_year ) {
/* Close off the OL */
?>
</ol>
<?php

$working_year  =  $prev_post_year;

/* Print year headings until we reach the post year */
while ( $working_year > $post_year ) {
$working_year--;
?>
<h3 class="archive_year"><?=$working_year?></h3>
<?php
}

/* Open a new ordered list */
?>
<ol class="archives_list">
<?php
}

/* Compute difference in days */
if ( ! is_null( $prev_post_ts ) && $prev_post_year == $post_year ) {
$dates_diff  =  ( date( 'z', $prev_post_ts ) - date( 'z', $post_ts ) ) * $distance_multiplier;
}
else {
$dates_diff  =  0;
}
?>
<li style="margin-top:<?=$dates_diff?>px"><span class="date"><?php the_time('F j'); ?><sup><?php the_time('S') ?></sup></span> <a href="<?php the_permalink() ?>"><?php the_title(); ?></a></li>
<?php
/* For subsequent iterations */
$prev_post_ts    =  $post_ts;
$prev_post_year  =  $post_year;
endwhile;

/* If we've processed at least *one* post, close the ordered list */
if ( ! is_null( $prev_post_ts ) ) {
?>
</ol>
<?php } ?>