WordPress Plugin Boilerplate

A standardized, organized, object-oriented foundation for building high-quality WordPress Plugins.

Contents

The WordPress Plugin Boilerplate includes the following files:

• .gitignore. Used to exclude certain files from the repository.
• CHANGELOG.md. The list of changes to the core project.
• README.md. The file that you’re currently reading.
• A plugin-name subdirectory that contains the source code - a fully executable WordPress plugin.

Features

• The Boilerplate is based on the Plugin API, Coding Standards, and Documentation Standards.
• All classes, functions, and variables are documented so that you know what you need to be changed.
• The Boilerplate uses a strict file organization scheme that correspond both to the WordPress Plugin Repository structure, and that make it easy to organize the files that compose the plugin.
• The project includes a .pot file as a starting point for internationalization.

Installation

The Boilerplate can be installed in one of two ways both of which are documented below. Note that because of its directory structure, the Boilerplate cannot be installed “as-is.”

Instead, the options are:

Copying a Directory

1. Copy the trunk directory into your wp-content/plugins directory. You may wish to rename this to something else.
2. In the WordPress admin area, navigation to the Plugins page Locate the menu item that reads “The WordPress Plugin Boilerplate.”
3. Click on Activate.

Creating a Symbolic Link

On Linux or OS X

1. Copy the WordPress-Plugin-Boilerplate directory into your wp-content/plugins directory.
2. Create a symbolic link between the trunk directory and the plugin. For example: ln -s plugin-name/trunk /path/to/wordpress/wp-content/plugins/plugin-name
3. In the WordPress admin area, navigation to the Plugins page Locate the menu item that reads “The WordPress Plugin Boilerplate.”
4. Click on Activate.

On Windows

1. Copy the WordPress-Plugin-Boilerplate directory into your wp-content/plugins directory.
2. Create a symbolic link between the trunk directory and the plugin. For example: mklink /J path\to\wp-content\plugins \path\to\WordPress-Plugin-Boilerplate\trunk\plugin-name
3. In the WordPress admin area, navigation to the Plugins page Locate the menu item that reads “The WordPress Plugin Boilerplate.”
4. Click on Activate.

Note that this will activate the source code of the Boilerplate, but because the Boilerplate has no real functionality so no menu items, meta boxes, or custom post types will be added.

Examples are slated to be added to the Boilerplate’s website as the site continues to grow.

Install dependencies with Composer

Go into the plugin-name/trunk directory and run composer install.

Autoloaded Namespaces (PSR-4)

• The Lib/ directory is loaded into the PluginName\Lib namespace
• The Admin/ directory is loaded into the PluginName\Admin namespace
• The Public/ directory is loaded into the PluginName\Pub namespace
• Other directories will autoloaded if directory-name matches the namespace

Recommended Tools

i18n Tools

The WordPress Plugin Boilerplate uses a variable to store the text domain used when internationalizing strings throughout the Boilerplate. To take advantage of this method, there are tools that are recommended for providing correct, translatable files:

• Poedit
• makepot
• i18n

Any of the above tools should provide you with the proper tooling to internationalize the plugin.

License

The WordPress Plugin Boilerplate is licensed under the GPL v2 or later.

This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License, version 2, as published by the Free Software Foundation.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA

A copy of the license is included in the root of the plugin’s directory. The file is named LICENSE.

Important Notes

Licensing

The WordPress Plugin Boilerplate is licensed under the GPL v2 or later; however, if you opt to use third-party code that is not compatible with v2, then you may need to switch to using code that is GPL v3 compatible.

For reference, here's a discussion that covers the Apache 2.0 License used by Bootstrap.

Includes

Note that if you include your own classes, or third-party libraries, there are three locations in which said files may go:

• plugin-name/Lib is where functionality shared between the admin area and the public-facing parts of the site reside
• plugin-name/Admin is for all admin-specific functionality
• plugin-name/Public is for all public-facing functionality

Note that previous versions of the Boilerplate did not include Loader but this class is used to register all filters and actions with WordPress.

The example code provided shows how to register your hooks with the Loader class. More information will be provided in the upcoming documentation on the website.

Assets

The assets directory contains three files.

1. banner-772x250.png is used to represent the plugin’s header image.
2. icon-256x256.png is a used to represent the plugin’s icon image (which is new as of WordPress 4.0).
3. screenshot-1.png is used to represent a single screenshot of the plugin that corresponds to the “Screenshots” heading in your plugin README.txt.

The WordPress Plugin Repository directory structure contains three directories:

1. assets
2. branches
3. trunk

The Boilerplate offers support for assets and trunk as branches is something that isn’t often used and, when it is, is done so under advanced circumstances.

When committing code to the WordPress Plugin Repository, all of the banner, icon, and screenshot should be placed in the assets directory of the Repository, and the core code should be placed in the trunk directory.

What About Other Features?

The previous version of the WordPress Plugin Boilerplate included support for a number of different projects such as the GitHub Updater.

These tools are not part of the core of this Boilerplate, as I see them as being additions, forks, or other contributions to the Boilerplate.

The same is true of using tools like Grunt, Composer, etc. These are all fantastic tools, but not everyone uses them. In order to keep the core Boilerplate as light as possible, this feature have been removed and will be introduced in other editions, and will be listed and maintained on the project homepage

Credits

The WordPress Plugin Boilerplate was started in 2011 by Tom McFarlin and has since included a number of great contributions. In March of 2015 the project was handed over by Tom to Devin Vinson.

The current version of the Boilerplate was developed in conjunction with Josh Eaton, Ulrich Pogson, and Brad Vincent.

The homepage is based on a design as provided by HTML5Up, the Boilerplate logo was designed by Rob McCaskill of BungaWeb, and the site favicon was created by Mickey Kay.

Documentation, FAQs, and More

Because this version is a major rewrite of the core plugin, we’re working to create an entire site around the Boilerplate. If you’re interested, please let me know and we’ll see what we can do.