Method by which plugins and themes extend core WordPress functionality.

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5
votes
3answers
2k 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 ...
6
votes
4answers
5k 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 ...
4
votes
1answer
5k 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 ...
1
vote
3answers
11k 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 ...
4
votes
3answers
7k 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 ...
2
votes
1answer
222 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', ...
2
votes
1answer
4k 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', ...
7
votes
2answers
22k 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
1k 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. ...
5
votes
3answers
10k 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 ...
3
votes
2answers
204 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
4k 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 ...
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
1answer
439 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
1k 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
3answers
2k 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' ...
1
vote
1answer
330 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
590 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
447 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 ...
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
123 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
158 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
2answers
253 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
5k 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
2answers
355 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
4k 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
87 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
209 views

filter the_title problem in nav

Hi I have a problem with the_title filter: I have this code at my constructor: add_filter( 'the_title', array($this, 'change_title') ); and this as callback (for testing purposes) public ...
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 ...
1
vote
1answer
1k views

How to check if certain plugin exists and in expected version

I've created plugin that goes to wordpress plugin repositories. Now, I need to create another plugin (sub plugin or child plugin you may call) that require this certain plugin to be already installed ...
0
votes
1answer
114 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?
0
votes
1answer
41 views

Is it possible to be more page/post specific with admin_enqueue_script?

I am using this code to load a stylesheet in the admin, but only on post.php related pages: function my_enqueue_for_post_pages_only($hook) { if( 'post.php' != $hook ) return; ...
0
votes
2answers
632 views

How to hook into the quick edit action?

I found this solution to automatically assign parent terms when a child term is selected, which is working fine for the save_post hook: add_action('save_post', 'assign_parent_terms'); function ...
0
votes
2answers
4k views

Hook 'wp_enqueue_scripts' priority has no effect

In a theme I am working there are up to 3 Stylesheets. I am using the hook 'wp_enqueue_scripts'. The order of the stylesheets is important for overwriting styles. I have a code like this: ...
0
votes
1answer
330 views

Does the 'nav_menu_css_class' filter accept 2 or 3 arguments?

I've been using the nav_menu_css_class filter in one of my plugins, implemented as: add_filter( 'nav_menu_css_class', 'wbwcrf_nav_menu_css_class', 10, 3 ); function wbwcrf_nav_menu_css_class( ...
0
votes
3answers
1k views

How to get post ID with hooks publish_post, new_to_publish, etc

I have two plugins, one uses the function wp_insert_post(), the other has a code like this: add_action('future_to_publish', 'myFunc', 10, 1); add_action('new_to_publish', 'myFunc', 10, 1); ...
0
votes
1answer
458 views

run script on publish

I am trying to run a script when a user publishes / updates a post. I am using the filter: wp_insert_post_data The problem I am having is the script is a php file outside of WordPress but on the ...
8
votes
1answer
1k 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 ...
6
votes
2answers
572 views

Wordpress and event-driven programming - what is it about?

I want to state very clearly that this does not intend to revive the discussion about functional/procedural programming versus object-oriented programming. There is plenty said about that, on WPSE and ...
6
votes
2answers
3k views

Earliest hook to reliably get $post/$posts

What's the earliest possible action I can hook into where I'll be able to access the global $post/$posts variables on both the front and back ends? I've tried looking through the Codex reference, Adam ...
4
votes
1answer
359 views

Perform action on WPMU blog deletion

Hi guys :) I know there is the wpmu_new_blog action hook which enables us to perform an action when a new WPMU blog is created. Is there something similar to this which enables us to perform an action ...
3
votes
3answers
1k views

How to Debug the 'save_post' Action?

Is it possible to validate PHP code? I have a Custom Post Type (Film) with Custom Meta Boxes. Everything is working fine, I can add new Films and details to the Custom Meta Boxes. My problem is ...
3
votes
2answers
3k views

Check if action hook exists before adding actions to it

I am trying to add a rel=next and rel=prev link tags to the head element of image.php template file. I have Wordpress SEO installed and I like to hook to this plugin wpseo_head action hook to achieve ...
3
votes
2answers
1k views

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

So I have a plugin that appends or prepends an enhanced author biography to the content of a page/post/custom post type. It does this by hooking to either the_content or the_excerpt and ...