actions - Read For Learn

Can the wp_filter object hold multiple values with the same key

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

Should action callbacks start with a verb?

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

Which are the hooks run before/after when a category’s deletion?

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.

Create cron job without a plugin?

Just look at the examples in the WordPress Codex for: wp_schedule_event wp_schedule_single_event

register_taxonomy and register_post_type does not work [closed]

I copy pasted your code into my functions.php and it worked for me, make sure you are using a recent version of WordPress that supports Custom Post Types

Add title, post content, and category like add_post_meta and update_post_meta

By using wp_update_post(), found in wp-includes/post.php: // Update post 42 $post = array(); $post[‘ID’] = 42; $post[‘post_category’] = array( … ); $post[‘post_content’ ] = ‘This is the updated content.’; $post[‘post_title’ ] = ‘This is the updated title.’; // Update the post into the database wp_update_post( $post );

add action for displaying posts using a shortcode

You don’t need to hook into an action for a shortcode – adding the shortcode using add_shortcode() will make it run when you call the_content(). That said, your function for your shortcode needs to return your output, not just echo it outright. Otherwise you will find that your form will appear much earlier than you … Read more

How do I add a TinyMCE row that all users can see, instead of just admins?

Your if statement wants the user to be able to posts AND pages, which only applies to admins and editors by default. Are you sure editors cannot see the buttons? If you want anybody who can edit posts to see the buttons (e.g. authors and contributors) take out the check for edit_pages or make it … Read more

WP_cron won’t trigger my action

You need to call add_action from outside the class, with a reference to the object. Example: $cj = new Cronjobs; add_action(‘update_properties_daily’, array(&$cj, ‘do_updates’));

how to determine how many and what kind of arguments are passed to hooks

When calling an action hook using add_action(‘some_action_tag’,’callback_function’,$priority,$number_of_arguments); The callback function is called when a do_action() call is fired with the corresponding tag for example: do_action(‘some_action_tag’,$argument1,$argument2,$argument3….); And when calling a filter hook using: add_filter(‘some_filter_tag’,’callback_function’,$priority,$number_of_arguments); The callback function is called when a apply_filters() call is fired with the corresponding tag for example: $value = apply_filters(‘some_filter_tag’,$argument1,$argument2,$argument3…); Now as … Read more

+ More