When you see a hook callback described as UM_User_posts–>add_tab, you know there must be an UM_User_posts object somewhere. If add_tab() had been called statically, the callback description would be UM_User_posts::add_tab. Now you need access to the same instance of the UM_User_posts class that the plugin is using. How to get to that instance? That’s often … Read more
Where are you calling the class? A class by itself will do nothing unless it’s used. So, add at the very end $activate = new Test_Plugin();
The best way of passing PHP variables to JavaScript is using wp_localize_script, which helps to localizes a registered script with data for a JavaScript variable. Here is a solution in StackOverflow, from where you can get idea to fix your problem.
Updating an existing comment in the database is done by the function wp_update_comment. As you can see, there is one hook, edit_comment, which you can use to trigger an action when a comment is updated. However, this hook fires after the comment has been updated. If you want to store the older version of the … Read more
wpas_after_ticket_submit is the hook name, not the function name. Functions are hooked to it with add_action() by setting the first argument of add_action() to wpas_after_ticket_submit, and the function name as the second argument: add_action( ‘wpas_after_ticket_submit’, ‘function_to_hook’ ); So you need to find a use of add_action() where the first argument is wpas_after_ticket_submit. The 2nd argument … Read more
In case it helps anyone, the do_action(‘woocommerce_review_order_after_order_total’) is called in the middle of a table in the template and expects a table row to be echoed by the add_action hook. If you just echo text or, as in the question, an input, it falls outside the table, appears before not after the table and presumably … Read more
Updated answer for WordPress 5.5.0+ As of 5.5.0, a new filter has been added to wp_delete_attachment: /** * Filters whether an attachment deletion should take place. * * @since 5.5.0 * * @param bool|null $delete Whether to go forward with deletion. * @param WP_Post $post Post object. * @param bool $force_delete Whether to bypass the … Read more
Ignoring our off-topic request for a plugin, the good news is: yes, this is possible. On the other hand, it is quite some work, so I will give just an outline here. WordPress does have built-in image manipulation. The default one is Image Magick. WordPress’ image editor class, however, only offers a subset of what … Read more
The parent theme’s functions.php runs after the child theme’s, so in order to remove an action defined by the parent theme the remove_action call must be delayed using a hook after the parent theme registers the action. So putting the remove_action call purely inside the child’s functions.php won’t work. It must be attached to a … Read more
The action you are looking for is wp_body_open(). I do not know if you are writing your own theme or not but if you are using a pre-built theme, the author of your theme may not have included this support. If properly supported in your theme, any function hooked to this action will be called … Read more