properties_add_rewrite_rules should be hooked to init so it runs on every request. Rules can be flushed at any time- loading the permalinks settings page calls flush_rewrite_rules, and your rules weren’t added on that request, so they disappear.
Properly maintaining an old rewrite structure
There isn’t much “dynamic” about actually creating folder tree and index files in it. What you have right now is completely tangential to your WordPress installation. In a nutshell, if you need to integrate this with WordPress, you have two approaches: Load WordPress core in your code. This can be done with including wp-load.php and … Read more
Custom post type with parent page? Possible?
cat is a reserved query variable used for the ID of a post category. To avoid conflicts with WordPress and/or other plugins and themes I’d recommend you ‘namespace’ your query variables eg eddh_cat instead of cat
Remove trailing slash
You could use 2 of WordPress’ built in functions to get the result you’re after. add_rewrite_tag() and add_rewrite_rule() There is an example of how to use these tags to get the result you want about halfway down this page https://codex.wordpress.org/Rewrite_API/add_rewrite_rule. Note: remember to flush your rewrite rules.
First of all, you have to make sure to register your public query vars with WordPress so it recognizes your rewrite rule vars. Add this code on your functions.php file: add_rewrite_rule(‘^(tips)/([^/]*)/([^/]*)/?’, ‘index.php?name=$matches[1]&id=$matches[2]&filter_id=$matches[3]’,’top’); add_filter(‘query_vars’, ‘foo_my_query_vars’); function foo_my_query_vars($vars){ $vars[] = ‘id’; $vars[] = ‘filter_id’; return $vars; } After that, enter on your Permalinks Settings page to flush … Read more
pagename is for the page post type, if you are trying to pass the slug for the presskit post type, remove post_type and pagename and just set presskit=$matches[1] instead.
How to list posts of a given format