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.

learn more… | top users | synonyms (1)

12
votes
1answer
3k views

WP 3.3 How to Add Menu Items to the Admin Bar?

I've just installed the Yoast SEO plugin and noticed that a new flyout menu was added to the admin bar once the plugin was activated. Anyone know is there is a tutorial or example on how this is done?...
12
votes
3answers
1k views

Conditionally enqueue a widget's script/stylesheet in HEAD (only when present on page!)

I've been trying to load scripts and styles for a WordPress widget with the following conditions... The scripts MUST load in the HEAD (else they break). The scripts must ONLY load when the widget ...
12
votes
3answers
683 views

What are the advantages to the Settings API?

Let me preface this by saying that I hardly ever work with WordPress - in fact, the last time I did a site in WordPress was back during 2.2. Yesterday I made quite a mess of everything and asked ...
12
votes
4answers
3k views

Update widget form after drag-and-drop (WP save bug)

I've posted a bug-report about this a few months ago (on WordPress trac (Widget Instance Form Update Bug)) and I thought I'd try writing about it here too. Maybe someone has a better solution to this ...
12
votes
2answers
2k views

Single functions.php or split into many small files?

I am creating a simple framework with theme options. I have divided chunks of code within functions.php and placed it within a specific folder structure. Now in my main functions.php file, I only ...
12
votes
4answers
319 views

Is it necessary to bump a plug-in's version if you're just updating the “Tested up to” attribute?

I've got a number of plug-in's hosted on the wordpress.org svn server ... with the immenent release of 3.1, I would like to update the "Tested up to" meta data. There will be no functional changes to ...
12
votes
1answer
7k views

Plugin Form Submission Best Practice

I have done a lot of researching and haven't found quite what I am looking for, so I am hoping that I can be pointed in the right direction. I am developing an Events plugin that will book a ticket ...
12
votes
2answers
3k views

How to store username and password to API in wordpress option DB?

I'm currently developing a plugin and the chances are that I will more than likely release it on the public plugin repository so others can use it. The plugin will be using an API and to use this API ...
12
votes
2answers
765 views

Is There a Plugin Life Cycle Documentation?

Is there some documentation somewhere that explains what is the life cycle of the plugins? I'm starting a new plugin with OOP style, and I just found out that my main class is being instanciated a ...
12
votes
2answers
6k views

How to add sub-menu to a menu generated by wp_nav_menu by using plugin

I have a menu generated by wp_nav_menu which look like <ul class="nav-menu" id="menu-top-nav"> <li class="menu-item menu-item-type-custom menu-item-object-custom menu-item-43" id="menu-...
11
votes
4answers
193 views

What do you think about custom designed plugin/theme options UIs?

You probably noticed the trend of making custom designed plugin/theme options UIs, especially in the commercial ones (on CodeCanyon for example - custom boxes, tabs, accordions etc). I personally ...
11
votes
5answers
9k views

Including jQuery and JavaScript files the correct way

I'm having some trouble with this. I'm not sure how to do it the correct way, and I read so many different techniques and ways to do it that I don't know what to make of it. Some questions and ...
11
votes
1answer
826 views

Plugin API for easy admin list table generation, handling & exporting of MySQL tables?

I'm aware of the WP_List_Table class (which has helped tremendously as it stands). However, I'm hunting for something even more capable - some form of API whereby you could simply 'register' a MySQL ...
10
votes
3answers
4k views

Should Plugin Folders Include a Blank index.php File?

WordPress itself, in the wp-content folder, includes an empty PHP file which looks like this. <?php // Silence is golden. ?> Should plugins include an empty file like this as well to stop ...
10
votes
4answers
22k views

What is the wordpress wp-includes folder for?

What is the wordpress wp-includes folder for? That is, whats the fundamental architectural purpose of it, for example why isn't it all in themes or an admin folder? Can a plugin developer rely in it'...
10
votes
2answers
2k views

How come `wp_options` table does not have an index on `autoload`?

In the beginning of each page served by WordPress, there is a MySQL call to fetch options: SELECT option_name, option_value FROM wp_options WHERE autoload = 'yes'; Because there's no index on ...
10
votes
4answers
7k views

What's the difference between term_id and term_taxonomy_id

The title says it all. At the moment in my custom taxonomies I'm getting the terms using the term id and taxonomy name. Thought this question would've been asked before but can't find it anywhere! So ...
10
votes
2answers
935 views

Strategy On Building Plugin Using Eclipse

Anyone who has experience in building wordpress plugin using eclipse PDT? My situation is: I need to build plugin that extend another plugin (look at it as premium version from another plugin) I ...
10
votes
2answers
3k views

dbDelta not creating tables

I went through a lot of threads, codex page and tried messing with a lot of things but my code doesn't seem to be creating the tables. And I am not able to figure out where I am going wrong. I checked ...
10
votes
2answers
1k views

Symbolic Links on dev box with plugins and stylesheets

I'm using mac os x 10.6 with xampp. http://wp3.1/ is the url to where I have WordPress installed. The physical path is /Users/myUserName/Sites/wp3.1/ I do not install plugins or themes in the "...
10
votes
1answer
220 views

Does the number of downloads displayed for a plug-in in the WordPress.org plug-in directory include automatic updates?

I'm wondering how the number of downloads displayed in the plugin-directory correlates to the number of actual websites using the plug-in. I realise some people will download and never install and ...
10
votes
6answers
3k views

How can I add an option to the Page Template list from a Plugin?

I've been looking around for the past couple hours for a way to create a custom page template from within a plugin but haven't had any luck yet. What I am specifically trying to do is add an option ...
9
votes
1answer
7k views

How to make a WordPress plugin translation ready?

What is the best way create a plugin that is translation ready? It doesn't have to be translated from the beginning but it has to be easily translatable so fellow developers from different cultures ...
9
votes
3answers
2k views

Best way to abort plugin in case of insufficient PHP version?

You write a plugin which requires PHP 5.1. Someone tries to install it on a server with PHP 4. How do you deal with that in a safe and user-friendly manner?
9
votes
2answers
8k views

List all sidebar names?

I'm listing all sidebars like that: global $wp_registered_sidebars; echo '<pre>'; print_r($wp_registered_sidebars); echo '</pre>' So I'm getting something like: Array ( [sidebar-...
9
votes
4answers
3k views

dealing with large HTML output via plugin code

I recently wrote my first WP plugin that adds a shortcode for embedding a custom jquery image gallery into posts. It's primarily just dumps a good chunk of HTML into the post, along with javascript ...
9
votes
4answers
10k views

What is difference between get_bloginfo('url') and get_site_url()?

I am developing a plugin. I want to know difference between get_bloginfo('url'); and get_site_url(); I got same output, then what's the difference?
9
votes
2answers
2k views

WP_Query leaking absurd amounts of memory

Every time I call WP_Query() in the function below, Wordpress leaks 8 megs of memory. And since I call this function a lot, things get hairy pretty quickly... :( I've tried unsetting the resulting $...
9
votes
2answers
3k views

Looking for WordPress System Diagrams

I am looking for WordPress chart/diagram system design. I found only the template hierarchy diagram, but it's only part of the system. source: http://upload.wikimedia.org/wikipedia/commons/3/3d/...
9
votes
2answers
5k views

How to Remove Certain Screen Options and Meta Boxes from add/edit post type?

Now, when you add or edit a particular post within your desired post type, there are more screen options as well. Although, these Screen Options are showing/hiding meta boxes. I would like to be able ...
9
votes
2answers
3k views

Custom Post Type Plugin: Where Do I Put The Template?

I'm writing a custom post type plugin. Part of it I'm outputting to the template via shortcodes. But other parts need a custom post template, and I figured out how to use the template hierarchy for ...
9
votes
1answer
3k views

How can I configure Docker for developing and deploying a custom theme?

I am getting started with Docker and I'm still new to professional WordPress development practices. I would like to set up a Docker development environment (on my Mac) so that I can do custom ...
9
votes
2answers
3k views

Add screen options to custom admin pages

I want to add screen options to my plugin settings page, like the ones that are available in the Dashboard. I tried using the add_option method of the WP_Screen object and found that it supports ...
9
votes
1answer
3k views

Adding Widget form fields dynamically

I am trying to add form field to a WordPress widget dynamically. So if the user want to add another date to an event they can click a button to get more fields. The question is: How do save newly ...
8
votes
4answers
19k views

How can you check if you are in a particular page in the WP Admin section? For example how can I check if I am in the Users > Your Profile page?

I'm building a plugin and I want to add bits of javascript in the admin head but only for certain admin pages. I don't mean pages as in a WordPress page that you create yourself but rather existing ...
8
votes
2answers
2k views

Settings API updated messages won't show if custom admin page not hooked into add_options_page()

Been playing around with the Settings API and found that messages (for success or errors) are only displayed when a settings page is hooked into WordPress menu via add_options_page(). Anything else ...
8
votes
6answers
3k views

Where to store PHP files created by plugin / themes

There are cases in which a plugin or theme needs to create a php file somewhere that can later include it. For example a captcha plugin, or some kind of a templating system like twig/smarty (In my ...
8
votes
1answer
7k views

How to override existing plugin action with new action

I'm using a plugin. It has an action like this. add_action('publish_post', 'old_action'); function old_action($pid) { "code goes here" } } I'm writing a module for this plugin. So i need to ...
8
votes
3answers
289 views

Best Practice for Referencing the Plugin Directory

My plugin uses the following code to reference a file, but I've read WP_PLUGIN_DIR won't work if a user renames the default plugin folder. I would also like to replace /location-specific-menu-items/...
8
votes
2answers
1k views

Is it mandatory to use $wpdb->prefix in custom tables

Sorry if this question is trivial. I'm just beginning to develop plugins in WordPress. In all the tutorials I found this: while creating the custom tables, $wpdb->prefix is used. Example: $...
8
votes
3answers
4k views

How to make a plugin require another plugin?

I'm building a plugin that adds extra functionality to a main plugin. Ideally in the plugins administration screen, the "activate" link should be disabled and an inline note should be added that tells ...
8
votes
2answers
5k views

Pass PHP variable to javascript

Is there any possibility to pass some PHP variables in javascript so I can use them later? Only in single.php. I heard about wp_enqueue_scripts but with that it is neccesary to declare a path to a JS ...
8
votes
1answer
132 views

Add self-closing shortcode button to TinyMCE in WP 4.6

I'm familiar with creating self-closing shortcodes like: // shortcode function wpse_shortcode_example( $wpse_atts ) { // Attributes $wpse_atts = shortcode_atts( array( '...
8
votes
2answers
816 views

How do I improve this admin query snippet to avoid generating duplicate results on non-meta searches?

I've been playing around with code snippets which add meta data to admin searches. The best snippet I've found was written by Stefano on this question. However, it appears to have 1, annoying bug ...
8
votes
1answer
3k views

Plugin - create a page without it appearing in the side menu

I am currently using add_submenu_page to add pages for my plugin. However, I wish to create a page that don't appear in the admin menu, is that possible?
8
votes
4answers
4k views

Update plugin from personal API

I'm developing a wordpress plugin at the moment which I do not want in the Wordpress plugin repository. However I still want to be able to push updates to my costumers from my own API repository. I'...
8
votes
2answers
2k views

Is wp-content/install.php a Drop-in?

I cannot find documentation or discussions on what is and how to use Drop-in plugins. The question was raised in this Q&A, Populate content on install. Is a wp-content/install.php file that ...
8
votes
2answers
3k views

Why activate_plugin is not working in register_activation_hook

I am trying to activate second plugin automatically while activating first plugin. register_activation_hook(__FILE__, 'example_activation' ); function example_activation() { include_once(...
8
votes
1answer
4k views

Making my plugin multi-site compatible

I want my plugin to be installed on each blog and create database tables per blog. I have this code: register_activation_hook( __FILE__, 'install1' ); function install1() { global $wpdb; if (...
8
votes
1answer
6k views

How are bulk actions handled in custom list table classes?

I'm working on a custom data table to display in the WordPress dashboard. The table populates from a database table I built in a plugin. I've been using the provided WordPress Custom List Table ...