Method by which plugins and themes extend core WordPress functionality.

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5
votes
3answers
3k 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.
1
vote
1answer
320 views

Hook any php file into the wordpress api

Say I just have a dumb .php file sitting on my WP server and I wanted it to access WP info through the API, how would I go about doing that? For example if I wanted to call bloginfo('url'); As I ...
5
votes
3answers
1k 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 ...
7
votes
2answers
5k 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 ...
1
vote
1answer
641 views

functions.php conditional tag - only show in single.php?

//Geo Map add_action( 'woo_post_inside_after', 'my_geo_mashup' ); function my_geo_mashup() { global $post; if ( in_category('listings') ) { echo GeoMashup::map(); } } Works to ...
0
votes
2answers
559 views

How to recover the post ID earlier in the WP admin hook action “firing” sequence?

I am creating a WP plugin based around Custom Post Types (CPT), where you can dynamically specify a CPT, complete with any number of associated dynamic Meta Boxes and form elements such as radio ...
0
votes
3answers
458 views

add_action hook for links.php page

What is the definite hook which identifies links.php page (add, edit, delete, etc. Blogroll Links), and only this page? Any help would be appreciated. Thanks, cadeyrn EDIT Sorry, I forgot to ...
0
votes
1answer
246 views

BuddyPress - A hook available to hide custom born date on public profile view?

I'm trying to hide some fields on public BuddyPress profiles, it is possible? Thanks in advance.
0
votes
1answer
178 views

Preset Widgets ONLY after site is initially created

I want to preset some widgets using functions included in my theme ONLY after a site is initially created (my theme is the default for all new sites in my instance of WordPress). I DO NOT want my ...
2
votes
2answers
543 views

specify meta_key / meta_value condition for prev_post_link and next_post_link

I've got a custom post type (CPT) called event. Every event has got an associated meta_key called event_date. I want to make sure that events with empty event_date won't appear in my list of all ...
0
votes
3answers
535 views

What action hook can I use to add a JavaScript to a page post using a theme template that is not including get_header() nor get_footer()?

So the reason why I am don't want to include get_header() or get_footer() tags is because this page will be loaded as an iframe using the thickbox modal plugin and its content will be a form and I ...
3
votes
1answer
3k 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).
1
vote
2answers
351 views

Hooking in to replace the Sidebar/Widget areas

The Goal: To replace the sidebar on all sites across my network with content loaded from a plugin, across all themes. I need a way of over-riding the sidebar/main widget area on all sites across my ...
1
vote
1answer
1k views

Why is save_post hook not running?

I am trying to save my meta box, I have something like function xxx_meta_box_callback() { add_meta_box('xxx-meta', 'xxx Details', 'xxx_meta_box', 'xxx-post-type', 'side', 'default'); ...
1
vote
1answer
2k views

WordPress Hook for user register

how can I tell WordPress, that if a user registers, it shall execute my function?
0
votes
3answers
654 views

What hooks to hook onto for automatic cache clearing

I have a WP-site with not that many writes, but quite a few reads and a few specific hotspots in the templates that I'd like to cache pretty aggressively with my own PHP-caching mechanism. I could ...
0
votes
1answer
818 views

Adding custom Field To The Posts Listing

Are there plugins or hooks to editing custom fields just from the posts listing in admin panel?
0
votes
1answer
369 views

Hook for plugin to insert into entry-meta

pretty simple. I'm creating a plugin and I want to dynamically insert some text that will change every hour into the line that is directly below the title of a post (So filters are no good). It's the ...
0
votes
4answers
2k 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 ...
3
votes
2answers
454 views

Seeking clarification on page request life-cycle

I'm just trying to get my head around the "life-cycle" of a typical page request in WordPress. The Action Reference page lists 38 actions that occur during a typical page load, but two things aren't ...
4
votes
3answers
3k 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 ...
3
votes
3answers
2k 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 ...
1
vote
1answer
1k views

hooks & filters and variables

I was updating the codex page example for action hooks, while playing around to get some reuseable functions done (originally for some Q over here @WA). But then i ran into a problem i wasn't aware of ...
2
votes
3answers
2k 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 ...
9
votes
1answer
4k 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!
1
vote
2answers
1k views

post meta data clearing on autosave

For starters I am using this GREAT answer to achieve custom post types as well as a custom way to insert those post types into other pages, you can view that answer here: Custom field/meta populated ...
2
votes
2answers
3k views

Filter the URL of next_posts_link & previous_posts_link

I am working with the qTranslate plugin to create a multi-lingual website. The plugin does a great job of translation except for on the next_posts_link & previous_posts_link template tags. When ...
4
votes
5answers
583 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 ...
1
vote
3answers
282 views

How to find hooks as per Just-In-Time approach?

How can I follow Just-In-Time approach in hooking up my function to an action? I mean everybody just attach the functions to a very early stage like init which leaves the scope of optimisation. I saw ...
0
votes
2answers
575 views

Categories widget show empty?

Is there a way I can display all categories in the categories widget that comes with wordpress. I do not want to have to edit the core files and I want to stay away from rewriting the widget, but if ...
2
votes
1answer
1k views

What is the 'admin_action_' . $_REQUEST['action'] hook used for?

There's an action hook triggered in admin.php called 'admin_action_'.$_REQUEST['action']. Unfortunately, it's a bit useless for plugins as it's triggered at the very end of admin.php, after ...
0
votes
2answers
2k views

Is there an “Add Page” hook?

I'm looking for the action hook corresponding to the click on the "Add page" link. Any idea? Thanks !
2
votes
1answer
754 views

How to change title attribute returned by comments_popup_link()?

I can change label of comments by altering Comment(s) from parameter of following function: comments_popup_link('No Comments;', '1 Comment;', '% Comments;'); But, seems that title attribute is ...
0
votes
1answer
562 views

Does admin_print_scripts-$hook_suffix work for nested paths to individual files?

Can the hook admin_print_scripts-$hook_suffix be used for a hook which has been created like $hookname = get_plugin_page_hookname("my-quiz/lib/admin/$code_page", '' );? .. where $code_page is ...
0
votes
1answer
235 views

How to add or delete default value theme options while activate and deactivate theme

I want to add & reset default value for my theme options while activate and deactivate a theme More clearly something like this if(theme active) add_option(); // add new option to the theme ...
1
vote
3answers
435 views

Good tools for locating hooks in a wordpress page/admin interface/blog post?

I've recently started using the Hikari Hooks plugin for Wordpress as it seems to allow you to get a good idea of what do_actions are being called on the page, so that you can easily find out where ...
1
vote
2answers
299 views

How to get all of the activate_plugin action parameters?

I am trying to hook into activate_plugin. I know that activate_plugin has 1 required param and 2 optional ones. I am trying to acquire all 3. Here's my setup: // create plugin settings menu ...
4
votes
3answers
5k 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 ...
1
vote
2answers
786 views

From what hook on is it possible to conditionally add actions?

I tried to have a siderbar registered at the "init" hook based on a variable from the theme options array indicating whether the sidebar should be used in the design. Now it appears that that the ...
0
votes
2answers
204 views

It's okay if I do not write add_action()

I downloaded various themes on net and I found on functions.php they write something like this Example to remove inline comment style. function demo_remove_recent_comments_style() { add_filter( ...
1
vote
3answers
563 views

How many times can I hook into the same action?

I have a theme which includes some setup, using after_setup_theme but I'd like to write my own functions which also need to run after_setup_theme. I'd prefer to keep my stuff in a separate file. Can I ...
0
votes
1answer
396 views

Proper indentation of code generated inside hooks

I really like having my code all properly indented and all, but all the code generated by wordpress, like the one that appears on the header when we use wp_head(), loses all the indentation. I think ...
1
vote
1answer
458 views

Event Calendar using insert_post_data after save_post and insert_post after post_transition draft_to_schedule

OK, I'm taking on the dreaded task of developing an event calendar for my site and have gotten a bit stuck. I'm open to any and all ideas but here's what I'm doing and what I'd like to do. I'm ...
1
vote
1answer
470 views

A good way to add a different background image for each page?

I'm working an a Thematic child theme wherein I need to have a unique image decorating each of the site's main pages, from a pre-defined set of permanent images. It would also be ideal to have one of ...
6
votes
4answers
5k 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?
0
votes
1answer
247 views

Which are the hooks run before/after when a category's deletion?

What are the actions that a plugin can hook on to for processing when the user deletes a category?
2
votes
1answer
1k views

Explanation of the “posts_join” and “posts_fields” filter hooks?

I'm new to the "posts_" filter hooks and wanted to know a few things from those in the know: In this question, someone posted an answer using posts_join that took a second parameter of $query: ...
1
vote
3answers
8k 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 ...
0
votes
2answers
1k views

Are there action hooks for comments?

This is for a personal-use plugin I'm trying to make. I want to submit a comment from site A to my blog (sort of like sending trackbacks/pingbacks but a full comment). For instance, on site A I have ...
1
vote
3answers
420 views

Insert all post IDs in new database table

I have a plugin which creates a new database table. Upon activating the plugin is there a way to insert all my posts ids into that table? Right now I'm using an action hook to immediately insert the ...