Custom post type yearly/ monthly archive
I have a custom post type "news" in my Wordpress site. I am using Advanced Custom Fields plugin to add meta data to each post.
I want to create an array of news items as an archive:
[2013]
[January] => 5
[2012]
[January] => 20
[February] => 10
[2011]
[April] => 30
I managed to get this working using:
global $wpdb;
$news = $wpdb->get_results(
"SELECT wp_posts.post_date, COUNT(wp_posts.ID) as count
FROM $wpdb->posts
WHERE
wp_posts.post_type = 'news' AND
wp_posts.post_status = 'publish' AND
wp_posts.post_date <= CURDATE() AND
wp_posts.post_date >= DATE_SUB(CURDATE(), INTERVAL 3 YEAR)
GROUP BY YEAR(wp_posts.post_date), MONTH(wp_posts.post_date)
ORDER BY wp_posts.post_date DESC",
ARRAY_A);
$archive = array();
foreach ($news as $post):
$year = date('Y', strtotime($post['post_date']));
$month = date('m', strtotime($post['post_date']));
$month_name = date('F', strtotime($post['post_date']));
$post['url'] = 'NOT SURE ABOUT URL';
$archive[$year][$month_name] = $post;
endforeach;
I need to be able to link to specific years and months using http://example.com/2012/ and http://example.com/2012/10/.
As this involves a custom post type "news" I'm unsure how to make this happen?
Answer
In order to do what you require, you need to modify Wordpress rewrites to be able to capture the year/month/etc post data for a custom post type.
You may do this with the following code:
/**
* Custom post type date archives
*/
/**
* Custom post type specific rewrite rules
* @return wp_rewrite Rewrite rules handled by Wordpress
*/
function cpt_rewrite_rules($wp_rewrite) {
$rules = cpt_generate_date_archives('news', $wp_rewrite);
$wp_rewrite->rules = $rules + $wp_rewrite->rules;
return $wp_rewrite;
}
add_action('generate_rewrite_rules', 'cpt_rewrite_rules');
/**
* Generate date archive rewrite rules for a given custom post type
* @param string $cpt slug of the custom post type
* @return rules returns a set of rewrite rules for Wordpress to handle
*/
function cpt_generate_date_archives($cpt, $wp_rewrite) {
$rules = array();
$post_type = get_post_type_object($cpt);
$slug_archive = $post_type->has_archive;
if ($slug_archive === false) return $rules;
if ($slug_archive === true) {
$slug_archive = $post_type->name;
}
$dates = array(
array(
'rule' => "([0-9]{4})/([0-9]{1,2})/([0-9]{1,2})",
'vars' => array('year', 'monthnum', 'day')),
array(
'rule' => "([0-9]{4})/([0-9]{1,2})",
'vars' => array('year', 'monthnum')),
array(
'rule' => "([0-9]{4})",
'vars' => array('year'))
);
foreach ($dates as $data) {
$query = 'index.php?post_type='.$cpt;
$rule = $slug_archive.'/'.$data['rule'];
$i = 1;
foreach ($data['vars'] as $var) {
$query.= '&'.$var.'='.$wp_rewrite->preg_index($i);
$i++;
}
$rules[$rule."/?$"] = $query;
$rules[$rule."/feed/(feed|rdf|rss|rss2|atom)/?$"] = $query."&feed=".$wp_rewrite->preg_index($i);
$rules[$rule."/(feed|rdf|rss|rss2|atom)/?$"] = $query."&feed=".$wp_rewrite->preg_index($i);
$rules[$rule."/page/([0-9]{1,})/?$"] = $query."&paged=".$wp_rewrite->preg_index($i);
}
return $rules;
}
You will notice that I have hard-coded news in to the $rules = cpt_generate_date_archives('news', $wp_rewrite); portion of the code. You can change this as needed.
With this code, you should be able to navigate to http://yoursite.com/news/2013/02/ and receive an archive listing for that specific post type for that specific time.
For completeness, I will include how to generate a monthly archive widget in order to utilize this.
/**
* Get a montlhy archive list for a custom post type
* @param string $cpt Slug of the custom post type
* @param boolean $echo Whether to echo the output
* @return array Return the output as an array to be parsed on the template level
*/
function get_cpt_archives( $cpt, $echo = false )
{
global $wpdb;
$sql = $wpdb->prepare("SELECT * FROM $wpdb->posts WHERE post_type = %s AND post_status = 'publish' GROUP BY YEAR($wpdb->posts.post_date), MONTH($wpdb->posts.post_date) ORDER BY $wpdb->posts.post_date DESC", $cpt);
$results = $wpdb->get_results($sql);
if ( $results )
{
$archive = array();
foreach ($results as $r)
{
$year = date('Y', strtotime( $r->post_date ) );
$month = date('F', strtotime( $r->post_date ) );
$month_num = date('m', strtotime( $r->post_date ) );
$link = get_bloginfo('siteurl') . '/' . $cpt . '/' . $year . '/' . $month_num;
$this_archive = array( 'month' => $month, 'year' => $year, 'link' => $link );
array_push( $archive, $this_archive );
}
if( !$echo )
return $archive;
foreach( $archive as $a )
{
echo '<li><a href="' . $a['link'] . '">' . $a['month'] . ' ' . $a['year'] . '</a></li>';
}
}
return false;
}
To use this function just supply the slug of the custom post type, ie: get_cpt_archives( 'news' ). This will return an array of unique Year/Dates/Links, ie:
Array
(
[0] => Array
(
[month] => February
[year] => 2013
[link] => http://yoursite.com/news/2013/02
)
[1] => Array
(
[month] => January
[year] => 2013
[link] => http://yoursite.com/news/2013/01
)
)
You can loop through these with a foreach and output them however you want.
Alternatively, you can use get_cpt_archives( 'news', true ) which will automatically echo each item wrapped in an <li> linking to its specific archive.
The formatting of the output is not exactly what you wanted, so you will have to tweak it a bit to get it to display in the
Year
Month
Month
Year
Month
format that you require.
I hope this helps.