Method by which plugins and themes extend core WordPress functionality.

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1answer
39 views

Is there any way to allow a plugin to write over a previous version?

When installing a plugin, it will not install if the directory to which it is attempting to install already exists. This means that users of our plugin must first manually deactivate and delete the ...
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2answers
2k views

Adding custom text in items titles from wp_nav_menu()

I need to add something after each title of a specific menu called by wp_nav_menu() I tried add_filter('wp_nav_title', 'testing_stuff'); with function testing_stuff() { $item->title = ...
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2answers
158 views

how to determine how many and what kind of arguments are passed to hooks

I am not able to understand a very logic behind add_action / add_filter Consider following example: function SearchFilter($query) { if ($query->is_search) { $query->set('post_type', ...
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2answers
405 views

add action for displaying posts using a shortcode

I'm developing a simple plugin for letting a user insert a post from the frontend. I have a shortcode [add-post] which a user can put on any page, say, for eg. My Wall Page Now on My Wall Page a ...
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1answer
776 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 ...
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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 ...
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2answers
93 views

add_action for unknown custom post types

If the custom post type is known (e.g., 'reference') then the add_action is add_action( 'publish_reference' , 'run_new_post_code' ); Great. But what is the proper code for an unknown custom post ...
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1answer
42 views

Namespaced action and filter tags

I'm upgrading several of my plugins to use PHP namespaces, so that functions, classes, constants etc are all namespaced correctly. <?php namespace my\plugin; function init() { ... } // ...
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1answer
176 views

Searching hook to set cookies before <head> and avoid “headers already sent”

I have written a plugin that sets cookies, and need to avoid the "Headers already sent" PHP error by placing the code at the very top before the head section. Themes usually place wp_head just before ...
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2answers
834 views

Fatal error: Class not found in

I am working on a plugin for 'hooking' an extra payment provider into a checkout system. I have a class gtpCheckoutData in my function.php which calculates the prices. In my plugin I want to use ...
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1answer
49 views

Add parameter (time) to oembed

I need to add a time parameter to the YouTube oEmbed callback. This time parameter should be set via URL. I found various answers which describe how to hook into the oEmbed callback, but none of them ...
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2answers
71 views

apply_filters/do_action tag characters limit

Does apply_filters/do_action $tag name have a characters limit? Can be any problems if the tag name is way too long? I ask this because I know that WP transients have a limit of 45 characters. FYI, ...
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1answer
100 views

How to hook in after user's registration email has been sent?

I want to redirect to a page after the user's registration email has been sent. What is the correct hook? user_register is too early, that is the user is entered into the database but the email ...
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1answer
346 views

Setcookie works on admin but not front end

I have a simple function to set a cookie to the value of whatever parameter is attached. For example, if I visit http://example.com/?devsource=http://dev.example.com/ it should set the value of the ...
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1answer
58 views

How to find a callback attached to a bbpress hook?

bbpress has a large number of callbacks attached to various hooks. I am familiar with this feature at the wordpress level but I am unable to locate where bbpress registers a large number of these ...
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2answers
72 views

How to place HTML below the title of the (custom) post overview

Edit: Yes, I know, I provided an answer to this question myself. However, I'm still interested in other solutions and/or comments on the one I found. Is this how you would do this? Are there any other ...
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1answer
225 views

Filter or action hook to insert content on admin pages before </body> tag

I am developing an administrator plugin and want to be able to write some HTML content just before the last body tag . This content will initially be hidden then displayed with javascript when a user ...
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1answer
87 views

Redirect logged in users if they are on a specific page

I'm trying to prevent a user access besides the admin to the registeration page and reset password page if they are already logged in. I have the following: function redirect_loggedin_users() { // ...
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1answer
2k 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: ** ...
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2answers
224 views

remove_action conditionally for Custom Post Type

By default, my theme is showing an author box below my posts. I am using a custom post type, and would like to remove this author box only on this post type. Here is how the theme is calling the ...
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1answer
174 views

Get current page_id before loop, in functions.php

In the Shoestrap theme, you often change content by using hooks. I want to add the following to functions.php but it doesn't work... // in functions.php if ( is_home() ) { add_action( ...
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1answer
161 views

Should I use function_exists() and/or add_action() in theme development?

I'm trying to get my theme ready for publication on WordPress.org I got this feedback: function_exist() it is not preferable 3.0 design Now I wonder what I'm doing wrong. In the current ...
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2answers
250 views

How to trigger the core WPLANG to make automatically set a language when the theme is activated? [duplicate]

I'm developing a theme especially for Bānglā blog posting, and it'd be under GNU license. I questioned about a Calendar Widget translation with some problems today, and got a comment saying: I'm ...
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1answer
324 views

Set template based on query in URL

I want to be able to force WordPress to load an page/post based on a query in the URL. www.mywordpresssite.com/posts/myarticle?template=custom This URL should load the myarticle post using template ...
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1answer
366 views

How do I successfully create a hook for an email override?

I'm creating an online apartment rental application using Visual Form Builder Pro. I need to have completed forms go to certain managers based on the property selection. Once a user selects a ...
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1answer
1k views

Wordpress: Apply filter/hook to a particular sidebar widgets?

I'm developing a theme that has more than 5 different sidebars and I want to apply a function to a particular one of them for styling purposes. Basically, the function will modify it's params using a ...
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1answer
357 views

Remove rewrite rules generated by plugin during deactivation‎

I have a simple plugin like the following add_action('generate_rewrite_rules', function ($wp_rewrite) { $wp_rewrite->rules = xxx + $wp_rewrite->rules; }); if (is_admin()) { ...
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1answer
495 views

How to remove a metabox from menu editor page?

I am not sure if it is much different for any page but I am wondering how to remove a metabox from the appearance>menu page without having to go into the wordpress core files and remove it. Is there ...
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1answer
279 views

Better post meta efficiency?

I work with websites which require using Post Meta for Post Objects within a particular Post Type. I often add a Meta Box to a particular Post Type, to provide additional settings for the new Post ...
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1answer
274 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 ...
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1answer
1k views

How to add hook to the_title() and get_the_title()

I've having trouble with accented characters now if i do utf8_decode() before echoing the title the problem is solved but instead of changing this all over my theme, can't I do this in one place that ...
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1answer
343 views

Count singular post views automatically

I'm trying to add some function to each loop called in the themes. What I'm doing is I add a function to count post view from here post views without plugin, to use the function I need to add this ...
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1answer
172 views

Checking post format during xmlrpc_publish_post

WordPress apparently stores post format information outside of the $post object. During publish_post this isn't (usually) a problem because you can check on formats via get_post_format( $post->ID ) ...
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2answers
194 views

Strict tag list - user should choose only existing tags for posts

While selecting tags for the posts the user is able to create new tags on fly. For example we have the tag 'animal' but the user misstpye it as 'aminal' - and Wordpress creates it. In our blog the ...
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1answer
820 views

Filter all html output

I would like to make sure no email address is published in plain. So i developed a plugin that replace all email addresses by a spambot-safe alternative. But some users put their email address in ...
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1answer
526 views

Add custom column in custom post type edit page

I am using the Content Scheduler plugin to control the post expire. The plugin will add a expiry date column on the wp-admin/edit.php in page and post. However it doesn't show in custom post type page ...
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1answer
3k views

Changing “Lost Password Email Link” to custom password reset page

On the Wordpress site I am working on, subscribers will not be allowed to see anything in the backend at all. Because of that I am creating a custom pages for the Wordpress login page that subscribers ...
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3answers
576 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 ...
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1answer
421 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 ...
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1answer
445 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 ...
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1answer
483 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 ...
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3answers
10k 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 ...
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1answer
34 views

Hook (or other way) to find out when another plugin is activated / installed

Is there some way to run a function when another plugin is being installed and/or activated? Basically I need something like register_activation_hook only for other plugins. The use case: I want to ...
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1answer
40 views

Any hook for pre-plugin-update -either bulk or single plugin update

Any hook is available on before the plugin update action ? i searched in hooks library . What is the exact hook? . Doing some stuff before updating plugin/theme .
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1answer
57 views

Is there an earlier hook than login_head or login_enqueue_scripts?

What I have: A basic plugin that enqueues a style-sheet and JavaScript file to modify the log-in forms. The logo, colour scheming and other styles are affected. My problem: As the /wp-login.php ...
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2answers
265 views

How to override WordPress registration and insert an auto-generated username?

I need to auto-generate usernames upon WordPress registration. I have a custom registration form set up and would like to create the username in functions.php. Can someone tell me why this isn't ...
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1answer
104 views

How to initialize something in unit test before the init hook being called?

I've a simple PHP Unit written for WordPress and want the initialize code before the main 'init' action being called from the plugin I want to test, e.g. class MyPlugin_Test_Example extends ...
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1answer
109 views

How to increase password requirements for registration [closed]

Ok I have buddypress installed which lets users choose a password at registration but it has zero requirements for it only asking that it be entered twice. So you can have a single character password ...
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1answer
77 views

Wordpress capabilities and restricted categories access

I've a Wordpress blog to share content with some people only. Users has to login to access this website. I created new roles and new capabilities on this blog. I've got some articles which belongs ...
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1answer
125 views

Plugin activation hook in an abstract class

I would like to create a common abstract class to use for every WordPress plugin that I develop. As a part of the class' initiation process, I would like to fire the activation hook which calls an ...