WordPress Plugins allow easy modification, customization, and enhancement to a WordPress blog. Instead of changing the core programming of WordPress, you can add functionality with WordPress Plugins.

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2answers
2k views

How-to implement admin Ajax inside an admin WP_List_Table?

I am new to WordPress if someone will help me I will be very appreciate. There is parameter ajax "true" but in docs. wasn't said how to implement Ajax using WP_List_Table Class? parent::__construct( ...
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votes
2answers
2k views

Inserting Taxonomy Terms During a Plugin Activation?

I've been trying various ways of doing this. Basically, I've been trying to make it so that a plugin of mine populates the terms of a taxonomy only once during the plugin's activation. The term ...
5
votes
1answer
675 views

Modifying the way WP sets cookies

I'm trying to create a custom plugin that will change the way that wordpress names its cookings. Specifically, I want to write my own version of wp_user_settings(). I know I probably shouldn't hack ...
5
votes
2answers
303 views

Best practice for including plugins as part of a theme?

I'm working on a theme that includes some functionality I've developed as separate plugins (as I'm hoping to release them independently). I'd like to include these plugins as part of the theme core ...
5
votes
1answer
303 views

Using a database view = evil incarnate?

I'm at a point in doing some WordPress plugin development where from what I can tell I either have to create an entirely new plugin or I can create a database view. The client wants some simple logs ...
5
votes
2answers
603 views

Strategies to implement selective loading of plugins

I'm trying to figure out some kind of mechanism to load plugins on demand, depending on the page url, to improve performance. My primary concern is that I have some admin-ajax.php calls that are ...
5
votes
1answer
748 views

How do you create an archive for a custom post type from a plugin?

So I'm creating a plugin to create buildings that list condos for sale. The simplest way to do this was to just create a custom post type for the buildings and then the listings but I'm now stuck on ...
5
votes
1answer
2k views

Register custom query args parameter for WP_Query()

I have written a plugin which can store a table of technical specifications for each post (product) in an own database table. For the search function of the site I want to add a custom parameter to ...
5
votes
2answers
1k views

Add custom user capabilities before or after the custom user role has been added?

Should custom user capabilities be added before the custom user role has been added, or the other way around? add_role() asks for and array of $capabilities in the third parameter of the function. ...
5
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1answer
893 views

Show Similar Post Titles ( Similar to Stack Exchange )

I really like how Stack Exchange sites handle posts, where after you finish typing the title it will list out similar titles. How can I implement something similar on my WordPress installation? The ...
5
votes
3answers
555 views

WordPress Plugin Development from Scratch. How?

I would like to learn how to create a plugin from scratch, there are tons of tutorials out there on the internet, but they are either premium or not a reliable resource. would like to know which are ...
5
votes
1answer
61 views

WordPress updates defined vs add_filter?

I'm trying to create a WordPress update automation plugin. here I got two option to make enable and disable the updates. Via define ex :defined( 'AUTOMATIC_UPDATER_DISABLED',true ) 2.via ...
5
votes
1answer
669 views

How to Change the Entire WordPress Admin panel Look and Feel?

I am trying to change the WordPress Admin panel look and feel for depending upon the different role types that are in WordPress. How can create/assign different themes for each role i.e. Editor > ...
5
votes
1answer
3k views

“Error: Options Page Not Found” on Settings Page Submission for an OOP Plugin

I am developing a plugin using Tom McFarlin's Boilerplate repository as a template, which utilizes OOP practices. I've been trying to figure out exactly why I'm unable to correctly submit my settings. ...
5
votes
2answers
417 views

What is the difference between using global $current_screen and get_current_screen()?

I have been looking at get_current_screen();. I have seen there is also a global $current_screen; that I could use. Here are two examples: // Using function function wpse_post_notice() { $...
5
votes
3answers
1k views

Trouble with Transient API when W3TC is activated [closed]

I'm using W3 Total Cache 0.9.2.11 on Wordpress 3.5.2. I've got a problem with transient API and w3tc's object cache setting. When I activate 'object cache' with memcached (other settings are default),...
5
votes
1answer
189 views

Listen to Post action

I am writing a plugin that adds a custom metabox to the post page. I would like to trigger an event when the user navigates away from the edit post page or when a user stops editing a specific post. ...
5
votes
1answer
1k views

Prevent notice and warnings in error_reporting?

When turning opn WP_DEBUG and WP_DEBUG_DISPLAY, I get tons of warnings and notices. I have tried to remove the warnings by doing a @ini_set('error_reporting', 1) to only show E_ERROR, but I still get ...
5
votes
1answer
394 views

Writing a plugin that notify my friends of new post that mentions(@) them

For example, I write a new post with content "Today I'm happy, because I finally met the girl that @David told me about bla blah..." Once the post is published, there should be an email notification ...
5
votes
4answers
947 views

How to control output of custom post type without modifying theme?

I have a custom post type 'properties' that I'd like to control the HTML output for. For simplicity, let's focus on the archive view. As a basic example, here is what a loop looks like in an archive....
5
votes
2answers
790 views

Passing current cookies in wp_remote_get to get Draft Post Preview

I want pass current user cookies in wp_remote_get function to get a Draft Post Preview page content. I check already the questions: What URL do you pass to wp_remote_get to load the body of the ...
5
votes
1answer
622 views

Wordpress URL Rewrite not working

I'm trying to create a custom url rewrite for my wordpress plugin. function insert_plugin_rewrite_rule($rules) { global $wp, $wp_rewrite; $wp->add_query_var('update_slug'); $ret = $...
5
votes
1answer
36 views

Customizing subject in comment notification e-mails

How do you customize the following code in functions.php in order to have "New comment" as subject in comment notification e-mails instead of the default WordPress subject? function ...
5
votes
2answers
62 views

Overide get_template_part( 'partials/post', 'sidebar' ); with a plugin

I am working on a site for a client who has a theme built for them by a different developer. They have asked me to make some changes to the site, and I'd like to put all of my changes into a plugin as ...
5
votes
1answer
12k views

How can a plugin create a page/form in the front end?

How can a plugin create a page/form in the front end thats not listed in pages (if possible). it should only be accessed through a direct link.
5
votes
1answer
238 views

WordPress and multithreading

I'm working on a plugin. I've created an API that reads and writes to a custom table in the DB. This API can be called potentially from N clients simultaneously (and it really happens). I noticed that ...
5
votes
1answer
113 views

Get specific color from admin color scheme

I know how to print the current color scheme by using: echo get_user_option( 'admin_color', get_current_user_id() ); or echo get_user_meta(get_current_user_id(), 'admin_color', true); but I need ...
5
votes
2answers
2k views

custom XMLRPC method plus authentication of user & WooCommerce order

I'm working with a custom XML-RPC method to capture some information for a plugin I am building. When activated the user has to authenticate themselves by entering there user/password given to them ...
4
votes
2answers
7k views

how to create child WordPress plugin

I like to create child plugin.. Explanation :- I have one parent plugin named X. This will work independently (like other existing plugins). Now I decided to add some extra features to that plugin ...
4
votes
1answer
6k views

Update Option Stored in Multi-Dimensional Array

I have data in the wp_options table currently stored as a multi-dimensional array (profile_element_order): a:12:{s:17:"img_base64_enable";s:1:"1";s:25:"moulding_combination_page";s:0:"";s:24:"...
4
votes
3answers
2k views

body_class hook for admin pages

The body_class hook seem only to work with non-admin pages. When I do add_filter('body_class', 'add_body_classes'); function add_body_classes($classes) { $classes[] = 'myclass'; ...
4
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2answers
203 views

Where do I start from

I'm student web developer and I'd like to know the things I should know before venturing into WordPress. Where do I start?
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2answers
5k views

How to pass a parameter to this add_filter example [duplicate]

I have a class with this function to provide a user language based on $user_id function provide_user_language($user_id) { return apply_filters('get_user_language',$user_id); } So in my script, I ...
4
votes
2answers
1k views

WP 3.3 Tooltips API?

Does anyone have a tutorial on how to implement the new Tooltips API into a theme or plugin? I'm eager to tap into this to help first time users of my theme and plugins. From mashable'e excellent ...
4
votes
4answers
378 views

Where is it better to start learning how to develop for Wordpress?

I have already read this question and answer to it ( Where do I start from ). So I have slightly different question. If I basicaly have no knowledge of how the WordPress code is structured and I have ...
4
votes
2answers
6k views

Making a plugin file accessible via url rewrite?

In my WordPress plugin I have a php file that generates some stats about the blog and outputs it as a simple text file. To access WordPress functions I've included this at the top of the file: define(...
4
votes
3answers
2k views

Creating two database tables via plugin

I'm working on a voting plugin for my site and I want to create 2 tables: one that stores votes and another that stores voter ips. In Codex it suggests to use an if statement to see if the table has ...
4
votes
3answers
258 views

Custom Post Type Link from Plugin

I'm currently working on a plugin that creates a custom post type. The issue I'm strugging with at the moment is that the custom post type is created fine, but when I go to add a new post I receive ...
4
votes
4answers
246 views

Can i do plugin commits directly from a plugin folder inside an installation using the Trunk SVN

I have several virtual hosts setup, three of them pull files via SVN when needed(though only the trunk folder actually needs this), using SVN for other versions make for easy patch creation, or easy ...
4
votes
3answers
3k views

Creating a default Custom Post Template that a Theme can override

I'm in the midst of building a Wordpress Plugin that adds a custom post type, for which I'd like to include a default template to display. Essentially, this is an event management plugin, and the ...
4
votes
2answers
5k views

Get post ID from the Create post/page admin interface?

I am adding a meta box in the create post/page interface and I want to get the ID of the post being edited/created so I can dynamically display the value of the input field. From the wordpress codex ...
4
votes
4answers
2k views

How to Get a List of Sub Blogs without Using get_blog_list()?

The get_blog_list() function has been deprecated from v3.0. How does one get a list of blogs in a multisite blog?
4
votes
2answers
3k views

Is There A Hook To Process The Content Of The Text Widget?

Is there any filter which can be used in a plugin to process the content of the text widget before it is rendered?
4
votes
2answers
4k views

Wordpress Update Plugin Hook/Action? Since 3.9

I've researched this a few times, yet my searching does not reveal much except custom code which may or may not be good WordPress practice. As of the latest releases (WordPress 3.9 "Smith"), has a ...
4
votes
1answer
3k views

Export data as CSV in back end with proper HTTP headers

I wrote a plugin that displays all products in a woocommerce store in admin settings option, now I want to add a link to download the products as CSV file. The problem is, when I click the link I get ...
4
votes
2answers
7k views

How to validate custom fields in custom post type?

I wrote a plugin that creates a custom post type with custom fields. To prevent users from entering incorrect information, how can I validate the data? I assumed that the save_post hook function ...
4
votes
2answers
1k views

Edit or Remove Plugin .htaccess Using The Admin Panel

I am looking for a way to edit or reset the .htaccess file for a wordpress site without access to the filesystem, working only with the wp-admin web interface and/or plugins* (see below for the back ...
4
votes
2answers
6k views

What is the difference between the “wp_footer” and “get_footer” actions?

I am working on developing a plugin, and I am trying to add a line of text to the bottom of the page, I see there are two actions that seems reasonable, wp_footer() and get_footer(). wp_footer sounds ...
4
votes
1answer
5k views

wp_mail is undefined

I am writing a plugin that opens up a form to invite people to a website by email and want to use wp_mail(). Whenever I use the wp_mail() function in any file in my plugin folder I always end up with:...
4
votes
1answer
2k views

function deactivate_plugins does not exist

I am getting function deactivate_plugins does not exist error when calling this function function deactivateSelf(){ deactivate_plugins(RSD_PLUGIN, true); //gives error: function ...