For a plugin I was creating I needed Yearly and Monthly archives with my own slug. Even after setting the rewrite rules it was not working. After much debugging and several hours later I finally figured it out. I’ll explain how you could do the same bellow.<\/p>\n
Spoiler Alert:<\/strong>\u00a0For the impatient, it was as simple as removing the old rules that are not setting the post type before adding the new rules \ud83d\ude42<\/p>\n I’m going to assume that you have already familiar with Custom Post types. If you are not read http:\/\/codex.wordpress.org\/Post_Types and then come back. Most important are Step 5 and Step 6. Other steps are typical for any plugin or theme using custom post types.<\/p>\n Step 1: Register the post type $rewritecode = array( if ($post->post_type == ‘my_class’ && ” != $permalink) {<\/p>\n $ptype = get_post_type_object($post->post_type);<\/p>\n $start = time(); $meta = get_post_custom($post->ID); $year = date(‘Y’, $start); $rewritereplace = array( return $permalink; \/\/ This is the important bit, unsetting the rules $new_rules[‘classes\/([0-9]{4})\/?$’] = ‘index.php?year=$matches[1]&post_type=incsub_event’; return array_merge($new_rules, $rules); \/\/prevent an infinite loop if (!is_array($value)) $array_key = ‘events\/([0-9]{4})\/?$’;
\nRead more about registering custom post types at
\n[code lang=’php’]register_post_type( ‘my_class’,
\narray(
\n‘public’ => true,
\n…
\n‘has_archive’ => true,
\n)
\n);[\/code]
\nStep 2: Add rewrite tags and permalink structure
\n[code lang=’php’]$event_structure = ‘\/events\/%year%\/%monthnum%\/%my_class%’;
\n$wp_rewrite->add_rewrite_tag(“%my_class%”, ‘(.+?)’, “my_class=”);
\n$wp_rewrite->add_permastruct(‘my_class’, $event_structure, false);[\/code]
\nStep 3: Add post_type_link<\/code> and rewrite_rules_array<\/code> filters
\n[code lang=’php’]add_filter(‘rewrite_rules_array’, ‘my_class_add_rewrite_rules’);
\nadd_filter(‘post_type_link’, ‘my_class_post_type_link’, 10, 3);[\/code]
\nStep 4: Return a proper permalink
\n[code lang=’php’]function my_class_post_type_link($permalink, $post_id, $leavename) {
\n$post = get_post($post_id);<\/p>\n
\n‘%my_class%’,
\n‘%year%’,
\n‘%monthnum%’
\n);<\/p>\n
\n$end = time();<\/p>\n
\n\/\/ This is where I store when the class starts
\nif (isset($meta[“my_class_start”]) && isset($meta[“my_class_start”][0])) {
\n$start = strtotime($meta[“my_class_start”][0]);
\n}<\/p>\n
\n$month = date(‘m’, $end);<\/p>\n
\n($post->post_name == “”)?$post->id:$post->post_name,
\n$year,
\n$month,
\n);
\n$permalink = str_replace($rewritecode, $rewritereplace, $permalink);
\n} else {
\n\/\/ if they’re not using the fancy permalink option
\n}<\/p>\n
\n}[\/code]
\nStep 5: Add rewrite rules
\n[code lang=’php’]function my_class_add_rewrite_rules($rules){
\n$new_rules = array();<\/p>\n
\nunset($rules[‘classes\/([0-9]{4})\/([0-9]{1,2})\/?$’]);
\nunset($rules[‘classes\/([0-9]{4})\/?$’]);<\/p>\n
\n$new_rules[‘classes\/([0-9]{4})\/([0-9]{1,2})\/?$’] = ‘index.php?year=$matches[1]&monthnum=$matches[2]&post_type=incsub_event’;
\n$new_rules[‘classes\/([0-9]{4})\/([0-9]{2})\/(.+?)\/?$’] = ‘index.php?year=$matches[1]&monthnum=$matches[2]&incsub_event=$matches[3]’;<\/p>\n
\n}[\/code]
\nStep 6: Don’t forget to flush
\n[code lang=’php’]add_action(‘option_rewrite_rules’, ‘my_class_check_rewrite_rules’);[\/code]
\n[code lang=’php’]function my_class_check_rewrite_rules($value) {
\nglobal $wp_rewrite;<\/p>\n
\nif ( ! post_type_exists( ‘incsub_event’ ) )
\nreturn;<\/p>\n
\n$value = array();<\/p>\n
\nif ( !array_key_exists($array_key, $value) ) {
\n$wp_rewrite->flush_rules();
\n}
\n$array_key = ‘events\/([0-9]{4})\/([0-9]{1,2})\/?$’;
\nif ( !array_key_exists($array_key, $value) ) {
\n$wp_rewrite->flush_rules();
\n}
\n$array_key = ‘events\/([0-9]{4})\/([0-9]{1,2})\/(.+?)\/?$’;
\nif ( !array_key_exists($array_key, $value) ) {
\n$wp_rewrite->flush_rules();
\n}
\n}[\/code]
\nThat’s it. Most important steps are Step 5 and Step 6<\/p>\n