How can I pass ‘right’ parameter into add_action? In short: You don’t pass ‘left’ or ‘right’ itself to add_action(), but you can make the parameter be available in your callback by using the fourth parameter for add_action(). See examples below. So despite you may already know this, a hook is a specific place in a … Read more
You can’t, and it doesn’t make sense to do so. Different pages/URLs enqueue different things, e.g. a WP Admin page won’t enqueue the same styles and scripts, widgets might enqueue things conditionally, etc. But in WP CLI those hooks don’t run, and there is no page or frontend. So the question doesn’t make sense at … Read more
Firstly, keep in mind that the structure of $wp_filter was changed in WordPress 4.7: https://make.wordpress.org/core/2016/09/08/wp_hook-next-generation-actions-and-filters/ As for your questions: Is this possible? Yes. Under what circumstances would this occur? If multiple functions have been hooked to the same action/filter, eg: add_action( ‘save_post’, ‘do_a_thing’ ); add_action( ‘save_post’, ‘do_another_thing’ ); In that case $wp_filter[‘save_post’] will have multiple … Read more
save_post becomes unwieldy under Gutenberg, in my experience. It fires at least twice, and none of the checks you have in place will distinguish between instances. I would consider replacing it with wp_after_insert_post, which was introduced into core for this very reason.
Are there any conventions or should I strive for consistency? No, as long as your actions are readable, unique, and it’s clear what they do, there is no rule to follow. Ideally the names you choose are consistent within the code you write. E.g. WooCommerce has chosen to use the woocommerce_ prefix, or when ACF … Read more
Updated Answer — @Quasimodo confirmed that they’re only interested in posts of the page type and that the numeric slugs are four-digit years, e.g. 2019. What can I do to allow numeric slugs for child pages? I would use the pre_wp_unique_post_slug hook that runs prior to wp_unique_post_slug, which means we’ll be filtering the slug before … Read more
wp_delete_category() is a small wrapper around wp_delete_term() ( source ). It has number of hooks, the one that comes right before delete is: do_action( ‘delete_term_taxonomy’, $tt_id ); Hooks after delete: do_action( ‘deleted_term_taxonomy’, $tt_id ); do_action(‘delete_term’, $term, $tt_id, $taxonomy); do_action(“delete_$taxonomy”, $term, $tt_id); There are also few earlier hooks that deal with remapping children terms.
I don’t think correct global indentation is possible without massive (and inefficient) output buffering to change it. Since you are primarily interested in this for debug purposes I suggest using some tool that will format and color-code output (of any page btw, not just those that you control). Firebug and View Source Chart work nicely … Read more
if ( is_single() && in_category(‘listings’) ) {
You mean something like this? <?php require ‘path/to/wordpress/wp-blog-header.php’; bloginfo(‘url’); ?>