Method by which plugins and themes extend core WordPress functionality.

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-1
votes
2answers
170 views

Hooks are not executing

Based on my understanding of hooks, you create a hook, by doing do_action('hook_name'); then add something to said hook and call the method where you want it to do the hook, so: public function ...
12
votes
3answers
2k views

get_template_part vs action hooks in themes

It seems to me both of these afford the opportunity for the end user to modify a theme without actually editing the themes files (via child themes). My question is, is one method preferred over the ...
11
votes
4answers
11k views

How to know what functions are hooked to an action/filter?

Is there a way to know what functions are hooked to a particular hook? For example if I'd like to know what functions are hooked to the wp_head hook.
7
votes
2answers
9k views

Trouble understanding apply_filters()

In apply_filters() apply_filters( $tag, $value, $var ... ); I'm having trouble wrapping my head around the $value and $var. I read the codex and it sounds like the $value can be modified, $var not, ...
6
votes
4answers
6k views

Import Wordpress XML File from Within Functions.php

I am developing a theme which has a different method of adding in content and so, the default install of Wordpress won't show any content because of this. I was wondering if it is possible to ...
13
votes
2answers
23k views

WordPress hooks/filters insert before content or after title

trying to insert content before the post content in my functions.php - I know how to use the regular wp hooks, but unsure how to insert into other areas. Tried this, but it kills content on any other ...
9
votes
3answers
143 views

Generate dormant hook references

It seems a lot of plugin developers take the time to add filter/action hooks to let users tweak their products’ functionality. Which is great, but what they often don’t do is provide a list of hooks ...
6
votes
4answers
7k views

Auto-retrieve YouTube Image for Thumbnail?

I have a custom post type that accepts a YouTube embed HTML snippet, title, and a featured image. Currently, I'm going and finding an image for the featured image, but ideally I would be able to ...
5
votes
1answer
7k views

Trigger custom action when setting button pressed

This is my first wordpress plugin and I'm running a lot of trouble making it work, it almost work fine but I don't find a way to accomplish this specific thing. Basically I've my custom setting page ...
5
votes
3answers
3k views

Changing Plugin Load Order

I'm writing a plugin, bar, which is dependent on another plugin, foo, being activated, and I need the functions from foo to be available when bar loads. Normally plugins are loaded in alphabetical ...
2
votes
1answer
3k views

Best Practices for Creating and Handling Forms with Plugins?

I'm writing a plugin that creates and handles a simple form. This has been my approach sofar, but it's turned out to have some major flaws: 1) On plugin activation, create a blank page for the form ...
14
votes
3answers
2k views

How many times will this code run? (or, how rich is grandma?)

Hypothetical example but real world applicability (for someone learning, like me). Given this code: <?php function send_money_to_grandma() { internetofThings("send grandma","$1"); } ...
5
votes
1answer
5k views

Difference between after_setup_theme and init action hooks?

What is the difference between the after_setup_theme and init action hooks? It seems they are both called right before any page in WordPress is loaded (even admin pages).
5
votes
3answers
8k views

add_action hook for completely new post?

publish_post Runs when a post is published, or if it is edited and its status is "published". Action function arguments: post ID. -Plugin API Documentation I've added the publish_post ...
5
votes
3answers
15k views

Is there a way to send HTML formatted emails with Wordpress' wp_mail function?

Is there an action_hook or something similar that could help me achieve this? I tried adding markup in a PHP string variable and just fired off an email with the wp_mail function like so: $email_to ...
4
votes
1answer
395 views

How do I flush the rules after saving settings using the Settings API?

I'm using the Settings API to allow the user to toggle the has_archive option on some custom post types. When the user turns archives on or off, I want to flush the rewrite rules. If I had written ...
4
votes
1answer
6k views

How can I see all the actions attached to an “add_action” hook?

I'm working with the admin bar and trying to debug some of the menus and their priorities. I know several callbacks get bound to actions, such as this one: add_action( 'admin_bar_menu', ...
3
votes
1answer
5k views

How to use the_excerpt in a filter hook?

I was hoping to process the_excerpt just like one would with the_content, but no such luck. How can I pass the excerpts of a Posts Page, through my plugin? I've tried variations on this: ...
3
votes
3answers
5k views

Hooking a function onto the sidebar?

I'm looking for a way to add some content to the top of the sidebar when it get's loaded. I've tried hooking onto the get_sidebar action as referenced here, but it seems to override the sidebar call ...
2
votes
1answer
251 views

How to debug removal of rewrite rule flushing?

I use Custom Post Types. I try this: functions.php add_action( 'admin_init', 'flush_rewrite_rules' ); Now I’d like to remove this again. I try this: remove_action( 'admin_init', ...
8
votes
2answers
31k views

How to customize woocommerce related products? [closed]

I have the following lines of code in my website that will display the related products at the bottom of my single product page in WooCommerce... functions.php: // display upsells and related ...
6
votes
3answers
5k views

Which hook should be used to add an action containing a redirect?

I want to build a plugin that grabs certain url params from the query string to build a new query string for the same page. I'm following the excellent the Professional WordPress Plugin Development ...
5
votes
1answer
2k views

Hook that fires when admin setting is saved

Is there any specific hook that fires when admin setting is saved. I have cached some data from admin back-end setting menu. Now i want to the delete the caching when setting saved in admin menu. ...
4
votes
2answers
226 views

Adding function directly vs using hook in function.php

We can use functions like register_nav_menu() directly in function.php and it works and we can also use a function to put register_nav_menu() inside of it and attach that function using a hook like ...
3
votes
3answers
3k views

Wordpress hook before inserting post into database

I need to do check the inserted post for certain keywords and perform some functions depending on the keywords found. is there a wordpress hook that executes "just before the post is inserted into ...
2
votes
2answers
4k views

what is correct way to hook when update post

i try to hook when post is updated but all hook i try never executed except updated_post_meta add_action('updated_post_meta', 'my_function'); function my_function($post_id) { echo 'This is ...
2
votes
3answers
3k views

Hook on trash post

I want to perform an action when I delete one of my custom post types, which hook should I use: wp_trash_mycpt or trash_mycpt My action should run solely when mycpt is in the 'publish', 'draft' ...
2
votes
1answer
455 views

In what sequence are the hooks fired when a post is “published”?

I would be grateful if someone could point out a link. I understand this may have a very lengthy answer but I searched and couldn't find any resource. Alternatively, it would also be nice if someone ...
2
votes
2answers
3k views

How do I “unhook” / de-register jQuery so that it's not called as part of wp_footer();?

I need to "unhook" jQuery from my wp_footer() ... it's being called automatically and I'm looking for something I can add to functions.php which prevents it from being called a second time in the ...
2
votes
2answers
3k views

When calling wp_title(), do you have to create some kind of “title.php” file?

... or does wp_title() already handle the various contexts in your blog? This could clarify for me how I can achieve a reusable index.php file without having all the conditional statements inside it ...
2
votes
1answer
2k views

How can I tell if I'm on a login page?

There are functions for is_home(), is_blog() is_single() etc... What's the best way to tell if I'm on a page that is requesting that I login? I guess that would just be the wp-login.php page.
1
vote
1answer
4k views

Customize user account activation message

During the process of a user creating a new account, once they click on the link in the activation email, they receive the message on the login page: Your account is now active! Username: ** ...
1
vote
1answer
467 views

Alter image output in content

I'm trying to implement the JAIL javascript into my WordPress install. The javascript requires me to add a data-attribute and change the output html of images. I have been looking through the codex ...
1
vote
3answers
613 views

Two-step login process - Is it possible?

Is it possible to do the following with Wordpress (without hacking too much code - I would like to make this a general plugin using simple hooks)? Log in with the username/password. If ...
0
votes
1answer
608 views

How to get the password and username of the add new user form (admin back end) in wordpress

I am trying to get the username and password that entered by the wordpress admin in the add new user screen to use those into creating a webmail account using cpanel api. How to do that? is there is ...
9
votes
2answers
2k views

Registering Class methods as hook callbacks

I'm not sure if I have done this correctly. As I understand it: if I have a class foo and a static method bar I can register that as the callback by passing the array array("foo","bar") as the ...
7
votes
3answers
16k views

Hook for post and page load

I need to run a function when a particular post or page is loaded. Is there any hook that lets me check whether a post is being displayed during page load ?
6
votes
3answers
6k views

Calling a Function After New Post Creation for a WordPress Custom Post Type?

Assume I created a new post type 'product'. Is there a way to perform a function (user created) when this new 'product' post has been created?
5
votes
2answers
168 views

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

Basically I want to be able to see the names of files on the front-end - not just templates e.g. category/page templates, but the actual theme files like header.php/sidebar.php/footer.php and so on. ...
5
votes
4answers
2k views

Is there a limit to hook priority?

When I wish my filter or action hook to override all others, I will assign it a priority of 999. However, lately I have been seeing some people use extreme values for the priority, such as 20000, and ...
3
votes
2answers
231 views

How to hook into the CPT's title placeholder?

I want to change the default placeholder text in my Custom Post Type title field. This isn't possible while registering a new post type. The following screenshot describes it.
3
votes
3answers
459 views

Define custom Page Template without its own .php file

Is there any way of defining a Page Template from some function/filter/hook, without having any .php file containing the comment at the top of the page to declare the Template Name? For example, ...
3
votes
2answers
8k views

Add subtitle to Woocommerce product title

I'm using WooCommerce on a site built with Pagelines Framework. I need to have a subtitle/customisable field appear under the product name anywhere it appears in the site. As it is, WooCommerce ...
3
votes
5answers
8k views

Adding onload to body

I'm currently trying to develop a plugin that will embed a Google Earth Tour into a WP post / page via a shortcode. The issue I am running into is that for the tour to load, I have to add an ...
2
votes
1answer
285 views

How to properly test a method that is called by an action hook

The constructor in my class adds an action to the 'init' action hook: class My_Custom_Post_Type { function __construct( $type ) { $this->type = $type; add_action( 'init', ...
2
votes
2answers
389 views

Load different template file when condition met?

If I visit a page on my WordPress site, WP goes and determines what template file it should use based on the template hierarchy. If I'm doing some logic checking in the hook init and say my ...
2
votes
1answer
6k views

add_action('wp_ajax_[action name]', myfunction) problem

I'm trying to integrate ajax in wordpress using the wp codex guidelines. In the PHP I added: wp_enqueue_script ( 'my_ajax', ADMIN_URL . 'js/ajax.js','jquery','1.0.0' ); wp_localize_script( 'my_ajax', ...
1
vote
1answer
113 views

Plugin development, hooks, generate content

I'm building my first plugin. This plugin will activate a theme, set up a default front page, register tax. / cpt, and create some content. (cpt = custom post types) I made it work all this in ...
1
vote
1answer
198 views

How to enable visual editor when editing comments on the dashboard?

For editing a comment in admin pages the editor is only html, can we modify the edit comment page with a filter to include visual editor too?
1
vote
3answers
2k views

Hook Widget to Woo Theme in functions.php

Right now I am adding a sidebar above my woocommerce products. How can I hook the sidebar to my theme. Have registered sidebar and it works. register_sidebar( array( 'name' ...