Yearly or Monthly Paginating Custom Post Type Archives + Permalinks

WordPress does not produce pretty permalinks for a custom post type’s year archives, month archives or daily archives.

You can find a custom post type archive by using a query string ie: http://yourdomain.com/?post_type=reviews&year=2013&monthnum=09.

You may want to rewrite your URL to http://yourdomain.com/reviews/2013/09.

The following code snippet can be added to your WordPress theme’s functions.php file to create custom post type date archives that have pretty permalink structure.

/**
 * 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('[YOUR-CUSTOM-POST-TYPE]', $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;
}

/**

* 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('[YOUR-CUSTOM-POST-TYPE]', $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;

}

Remember to modify [YOUR-CUSTOM-POST-TYPE] to reflect the post type you would like to create a date archive for.

Reference: Stackoverflow

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