There is no special hook to author change. But you can achieve it by using post_updated hook. Example: add_action(‘post_updated’, ‘prefix_on_update_author’, 10, 3); function prefix_on_update_author($post_ID, $post_after, $post_before) { if ($post_after->post_author != $post_before->post_author) { // author has been changed // you can add your own hook here or write your code } } Here is the codex … Read more
Thumbnails in WordPress can be generated by using wp_generate_attachment_metadata(), this function fires a filter after generating all the thumbnails wp_generate_attachment_metadata and the filter provides $metadata and $attachment_id to the hooked functions. You can hook your custom function to this filter. $metadata : Attachment metadata. What you need is $metadata[‘sizes’][‘<size-name>’], the <size-name> is the name of … Read more
Hi @Jonathan Sampson: There are several plugins to make Custom Post Types easier and some allow you to define Custom Fields too, in no particular order: WP Easy Post Types GD Custom Posts And Taxonomies Tools Custom Post Type UI Simple Fields As I mentioned above I’ve been working on one that does not provide … Read more
Available actions: pre_post_update – Runs just before a post or page is updated. publish_post – Runs when a post is published, or if it is edited and its status is “published”. save_post – Runs whenever a post or page is created or updated, which could be from an import, post/page edit form, xmlrpc, or post … Read more
There is the filter ‘pre_update_option_’ . $option. You have to know the option name. Options can be updated from front-end too, so WordPress doesn’t make a difference here. Then there is an action: ‘update_option’, you get the arguments $option, $oldvalue and $_newvalue. Finally, if the update went successful, you get two further actions: do_action( “update_option_{$option}”, … Read more
With the lastest version of WordPress (4.3) you can now natively remove the customizer’s theme switch setting without resorting to CSS hacks. /** * Remove customizer options. * * @since 1.0.0 * @param object $wp_customize */ function ja_remove_customizer_options( $wp_customize ) { //$wp_customize->remove_section( ‘static_front_page’ ); //$wp_customize->remove_section( ‘title_tagline’ ); //$wp_customize->remove_section( ‘nav’ ); $wp_customize->remove_section( ‘themes’ ); } add_action( … Read more
Have a look at the codex page for add_filter. The 10 is the $priority parameter (10 is default) which defines when your function will run in regards to the other functions which are attached to the nav_menu_css_class filter. 2 is the $accepted_args parameter which tells wordpress how many parameters the function you want to add … Read more
You may want to try: do_action(‘set_object_terms’, $object_id, $terms, $tt_ids, $taxonomy, $append, $old_tt_ids); You can find it under this Docs and the action is located at wp-includes/taxonomy.php add_action(‘set_object_terms’,’wpse5123_set_object_terms’,10,4); function wpse5123_set_object_terms($object_id, $terms, $tt_ids, $taxonomy){ if($taxonomy == ‘category’){ echo ‘<pre>’; print_r($terms); echo ‘</pre>’; exit; } } The code above isn’t tested but I think you get the point.
If you look at the code for wp-login.php both the login case and the default case run wp_signon(). The reason, so it seems to me, is to manage cases where a user already has a valid cookie for the site. So I don’t think there is a hook that fires only upon login, but it … Read more
You can use the_content with an high prioriety (lower number). add_filter( ‘the_content’, function( $content ) { return ‘Hello World ‘.$content; }, 0); You can even use negative priority: add_filter( ‘the_content’, function( $content ) { return ‘Hello World ‘.$content; }, -10); Note that this will apply everytime ‘the_content’ is used, no matter the post type, or … Read more