hooks - Read For Learn

Passing Additional Parameters to add_filter Callable

The second parameter in add_filter is a function with accepted arguments, not returned values. This is an example how I pass my custom array $args to change an existing array $filter_args: add_filter( ‘woocommerce_dropdown_variation_attribute_options_args’, function( $filter_args ) use ( $args ) { return eswc_var_dropdown_args( $filter_args, $args ); } ); function eswc_var_dropdown_args( $filter_args, $args ) { $filter_args[‘show_option_none’] … Read more

How To Determine If A Filter Is Called In A Sidebar/Widget Context?

On a parallel thread over on the WordPress hacks forum, someone suggested using in_the_loop() and that works some of the time, with some plugins that use either the_content and/or the_excerpt, but not all of the time with all the plugins I’ve been testing against. Likewise, I’ve now done further testing using is_main_query() and that works … Read more

Is there a hook or function I can use to display all theme files being used on a current page?

PHP has a function, get_included_files(), that returns all the files that have been included during a request. However, if you use that function you obtain all the files required: WordPress core files, plugin files… You need a way to: Filter out files that do not belong to the theme and child theme (if any) Include … Read more

WP Multisite: Adding pages on blog creation by default

The hook is not the problem – your code runs in the context of the current site, not the one just created! The following code isn’t tested, but it should at least highlight the problem: function wpse_71863_default_pages( $new_site ) { $default_pages = array( ‘Impress’, ‘Contact’, ); switch_to_blog( $new_site->id ); if ( $current_pages = get_pages() ) … Read more

how to limit edit_form_after_title hook to page and post edit only?

Personally I’d use a different approach, because @Shazzad‘s solution seems too much global dependent, and @s_ha_dum‘s needs 2 hooks instead of one. I’d use get_current_screen function to get a WP_Screen object, then I’d look at its property to run (or not) something after the title: function do_something_after_title() { $scr = get_current_screen(); if ( ( $scr->base … Read more

Using filters and actions for plugin API?

Surely this approach has some benefits, but has also some issues. It’s not really easy to use If the target of your plugin are WordPress developers, they will be very familiar with plugin API, but end users are not. For a non-developer, something like: $data = give_me_the_data(); It’s easier to understand, remember and type than: … Read more

My add_action (wp_footer, ‘method’) is not calling?

In a WordPress footer hooks are different for back-end(dashboard) and front-end. In Dashboard use “admin_footer” hook. In Front-end use “wp_footer” hook.

Adding onload to body

And here’s a jQuery solution (as Mike suggested in his first comment). function add_my_scripts() { wp_enqueue_script( ‘jquery’ ); wp_enqueue_script( ‘my_init_script’, SCRIPTSRC, ‘jquery’, ‘1.0’ ); } add_action( ‘init’, ‘add_my_scripts’ ); Then add a script to your plug-in that does this: jQuery.noConflict(); jQuery(document).ready(function($) { init(); }); This will start jQuery in no conflict mode (if it isn’t … Read more

Are there any action like ‘init_frontend’

You can combine add_action() and an is_admin() check: ! is_admin() and add_action( ‘init’, ‘my_custom_callback’ ); Now the callback function will run on front-end only.

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