Questions tagged [hooks]

Method by which plugins and themes extend core WordPress functionality.

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47
votes
1answer
12k views

Where is the right place to register/enqueue scripts & styles

I am using WordPress 3.1.4 by now. I am confused with where (which hook) do I use: to register and/or enqueue scripts and styles on front- and back-ends? Questions: Which are right hooks to use? ...
7
votes
2answers
2k views

Clarification on filters and hooks

I am about to start my first WordPress project and I have the task of moving customized core code that override the core into separate functions/files (this way it'll be easier to maintain when we ...
59
votes
4answers
34k views

Difference Between Filter and Action Hooks?

I have been looking at the plugin API a bit more in depth recently and I was wondering what real differences there were between action and filter hooks. They both are events that receive data as a ...
60
votes
12answers
51k views

Passing a parameter to filter and action functions

Is a way to pass my own parameters to the function in add_filter or add_action. For example take a look in the following code: function my_content($content, $my_param) { do something... using $...
5
votes
2answers
20k views

Execute function when post is published

I try to use this function i have created when a post is published for the first time. function a_new_post($post){ $post_id = $post->ID; if ( !get_post_meta( $post_id, 'firstpublish', $single ...
61
votes
6answers
48k views

How to get WordPress' hooks/actions run sequence?

In what order add_action hooks execute? i.e. init wp_head wp_footer after_theme_setup etc... ??? ??? ??? EDIT: I've also posted my solution.
51
votes
7answers
15k views

Where can I find a list of WordPress hooks?

Where can I find a list of all the WordPress hooks and over-ridable functions (pluggable, scriptable, etc)? Edit: Plugin is listed here.
33
votes
2answers
35k views

How to hook update_post_meta and delete_post_meta?

I'm still struggling to get my head around this whole hooking into things, so I'm really stuck on trying to do the following task: If update_post_meta is fired then check to see if the meta_key is ...
29
votes
1answer
24k views

how to limit search to post titles?

Is there a way to limit search to post titles? I know I can modify query.php core file but there must be a way to do it with hooks right? Thanks in advance!
15
votes
5answers
14k views

Theme Activate Hook

I would like to write a function to email me the URL of the website when my theme is activated. What is the hook initiated when the theme is activated?
1
vote
1answer
916 views

What's the difference between hooks, filters and actions? [duplicate]

It seems like the terms hooks, filters and actions are used interchangeably. What's the difference between them? What do they do? How do I use them?
22
votes
2answers
3k views

How do filters and hooks really work in PHP

How does filters and hooks actually work in WordPress? I'm asking about something advanced. How is it implemented in PHP? E.g how does it collect all the hooks from the different plugins and "attach" ...
22
votes
5answers
8k views

How do you use a CPT as the default home page?

I have a client who's site will be making heavy use of custom post types to configure their site. But I'm between a rock and a hard place for their requested home page. In reality, the home page ...
26
votes
5answers
52k views

How can I edit post data before it is saved?

I have a plugin and I would like to be able to run the post content through some filters before it is saved to the database. From looking at the plugin api, I see that two hooks that look like they ...
37
votes
6answers
39k 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.
25
votes
4answers
51k views

Difference between do_action and add_action

This question might be wrong, I am not sure about it. Because I am not clear on this. I know add_action it is used to to hook our function to the specified function. For example add_action('wp_head'.'...
32
votes
3answers
10k views

Are there any hooks that alter the 404 logic?

Provided you have a 404 page defined in your theme, Wordpress will display a 404 page if "tag" is defined in $wp_query->query_vars, and there are no posts matching that tag. I'm writing a plugin that ...
32
votes
2answers
73k 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 ...
35
votes
2answers
43k views

Get a list of all registered actions

I'm trying to debug a plugin which I didn't develop and I want to list all the registered actions. I've read this SO thread: WordPress: How do I get all the registered functions for 'the_content' ...
18
votes
3answers
6k views

How to add Custom Blog Options to new blog setup form?

Seems like a simple enough requirement, but I'm struggling: I want to add an option field to the "Add New Site". A simple text option is fine. How do I do this? I need to save this custom ...
13
votes
5answers
17k views

Is there a way to set default custom fields when creating a post?

When I'm creating a new post, just after clicking "Add New", when the post editor shows, instead of having to use the dropdown and choose a custom field to use, I'd like to have some default custom ...
11
votes
3answers
9k views

How do I implement the WordPress Iris picker into my plugin on the front-end?

This question here is asking the same question as I am, but there were no adequate answers nor a selected correct answer so I am asking again hoping if I ask in a more coherent manner I might get a ...
10
votes
2answers
4k views

Action hook for custom tax edit

So, i have a function in my template file functions.php which cache a search form that contain a custom taxonomie terms. I want to flush cache (or delete one cache group) when I add/delete/edit terms ...
19
votes
6answers
18k views

WP Cron Doesn't Execute When Time Elapses

The goal I want to use wp_schedule_single_event( ) to execute a single event that sends me an e-mail 8 minutes after the user submits a form. The issue The following code is in my functions.php: ...
31
votes
2answers
56k views

Is there a hook that runs after a user logs in?

I am writing a plugin that fetches some extended user info from a remote service and I need it to execute its function each time a user logs in. Is there a hook that gets fired after login that I can ...
14
votes
6answers
5k views

How to include code only on specific pages?

I'm learning about plugins and shortcodes. I noticed that when I activate my plugin its code gets loaded on all of my pages-- even pages that don't have my shortcode. (I don't mean content vs. admin ...
12
votes
2answers
18k views

Use wp init hook to call other hooks?

I want to know if it is a good practice according to WordPress theme or plugin development. add_action('init','all_my_hooks'); function all_my_hooks(){ // some initialization stuff here and then ...
3
votes
1answer
5k views

Admin Post Update Redirection to Posts Screen

Is there a hook I can use that when a post is created or updated it goes back to the list/table page of all the posts. If it is also possible to target a post type as well that would be cracking. It'...
17
votes
2answers
8k 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 ...
2
votes
2answers
3k views

RSS Feed Custom Title?

For some reason my RSS feed is repeating the site title twice without a space, obviously quite annoying. BlognameBlogname for example. Is there any hook i can use to have a custom title for the RSS ...
2
votes
5answers
7k views

Remove Page Title from Static Frontpage

I'd like to remove the post title from my static frontpage. Just that page. I've created a child theme from a free Press75 theme. So I'd like to make this change in my child theme's function.php. I ...
0
votes
3answers
505 views

Increment Page Order As Pages Are Created

In the Admin Panel, is there a way to hook into the page creation and increment Page Order number of each page or to be equal to the number of pages. Right now the default is 0 and when I make a new ...
0
votes
1answer
355 views

How can I do customizations on login, registration and password recovery forms?

There are a couple of answers here basically just linking to a plugin - to be fair there are some more specific ones too. I know there are many possibilities to use different hooks for the ...
26
votes
3answers
29k views

How to enqueue scripts on custom post add/edit pages?

I'm trying to enqueue a JS script only when someone is adding or editing a custom post type I created called "recipes". Currently the script works ok when I do this: if (is_admin()){ ...
18
votes
5answers
32k 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 hook to ...
12
votes
4answers
3k views

Hooking in to plugins

I'm working on a plugin that would ideally be able to do things when a user does something through a different plugin. I can add custom hooks in those plugins but obviously this wouldn't work well ...
9
votes
1answer
34k 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 ...
8
votes
4answers
27k views

Add custom classes to anchor in wp_nav_menu

I want to add a custom class to anchors in wp_nav_menu outputs. Default for example is: <li id="menu-item" class="menu-item menu-item-type-custom"> <a href="http://example.com">...
5
votes
5answers
1k views

Implementing advanced add_* function wrappers

add_action() and add_filter() are major functions. However in some scenarios add one more function and hook it somewhere approach gets bulky and inconvenient. I had determined for myself several use ...
4
votes
3answers
30k views

Remove title attribute from images

I'm looking for a way to remove the title attribute from images, preferably through using a hook or a filter. Most clients don't bother giving images a proper title, thus eliminating the purpose of ...
7
votes
5answers
10k views

WordPress auto login after registration not working

I looked up a bunch of threads trying to figure out how to automatically log a user in after registration, and came up with this. function automatically_log_me_in( $user_id ) { $user = ...
6
votes
3answers
18k views

Remove action from plugin on other plugin

I'm trying to remove two of the actions that adds a plugin (sportspress specifically). The actions of this plugins are: add_action('sportspress_before_single_player','...
5
votes
1answer
3k views

WP Multisite: Adding pages on blog creation by default

I’d like to have a page added by default when a new site is created with WP Multisite. So I have my function that creates two pages: function my_default_pages() { $default_pages = array('Impress'...
4
votes
1answer
12k views

How to create thumbnails for PDF uploads?

I'm developing a website that needs to allow users, within Gravity Forms, to submit a PDF file and have a JPG thumbnail created of the first page of the PDF that is then displayed in the created post. ...
7
votes
1answer
20k views

How to add a new product type on woocommerce product types? [closed]

I want to add a new custom "product type" to woocommerce plugin: Tried to duplicate one of currently exist product type files (woocommerce template structure) as a new file (file name and inside ...
2
votes
2answers
4k views

How to use filter hook 'post_updated_messages' in coherence with action hook 'save_post'

I am trying to send out e-mail, SMS and IM notifications to group members of this WordPress website, whenever a WordPress page in their user group has been published/updated. I figured using the ...
7
votes
1answer
5k 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. ...
7
votes
3answers
9k 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 ...
3
votes
1answer
9k views

Using the 'draft_to_publish' hook (post status transition)

I am trying to use the draft_to_publish hook (http://codex.wordpress.org/Post_Status_Transitions) to run a function when a post that is a draft becomes published. This hook does not appear to be ...
2
votes
1answer
3k views

Check before publishing, if already exist post with current custom field value

I have a custom post type with only 3 custom fields in it. $post_types = get_post_meta($post->ID,'post_types',true); $post_taxonomies = get_post_meta($post->ID,'post_taxonomies',true); $...

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