Episode One of Plugin Thoughts discusses the method of using action hooks and filters in your WordPress plugins to make them more extensible and easier to modify / extend for other developers and users. This entry is part 1 of 9 in the Plugin Thoughts Series
View PostAdmin Notices in the Network Admin
Admin Notices provide a an easy to use tool for plugin and theme developers to show messages and warnings in the WordPress Dashboard. The admin_notices hook is what we use to display our messages, however, this hook will only display messages in the regular Dashboard and not the Network Admin dashboard for multi site installs. [...]
View Post admin_notices, multisite, network_admin_noticesQuick Introduction to Action Hooks

Action hooks are used in WordPress to perform functions, or “actions”. They are used throughout many plugins and themes to provide an easy way for users of the theme or plugin to modify the output or the way it functions. This quick tutorial will give you a good introduction into how action hooks work.
View Post add_action, do_action, hookRegistering Custom Meta Field Types for Easy Content Types
Easy Content Types is a very powerful plugin that makes it really easy to setup custom post types, taxonomies, and meta boxes. One of great but lesser known features of the plugin is that it has an API built in to allow users to register their own custom meta field types that can be used [...]
View Post easy content types, meta fieldsAdd a Agree to Our Terms of Use Field to Restrict Content Pro
Restrict Content Pro, my plugin that allows you to easily run a premium subscription site with WordPress, has a very flexible registration form that is easy to add extra fields to. Want to add a field that stores extra information about the registering user? That’s easy! Want to add a new checkbox that users must [...]
View Post add_action, restrict content proUsing Filters to Alter HTML Output
Filter hooks in WordPress provide a very powerful way to “alter” the output of functions. Using filters we can easily add extra HTML to some functions, and strip HTML from other functions. Some filters, such as the “body_class” filter, allow us to modify the class names of an HTML element, and some filters have nothing [...]
View Post add_filter, apply_filters, filter, hookA Quick Introduction to Using Filters

Filter hooks are one of the the more powerful WordPress features that help to provide a huge amount of flexibility when it comes to modifying WordPress, including custom themes and plugins. There could easily be hundreds of different unique tutorials on how to use filters in themes and plugins, simply because of the huge array of [...]
View Post add_filter, apply_filters, filter, hook