Book Image

WordPress 3 Plugin Development Essentials

By : Everett Griffiths, Brian Bondari, Matt Mullenweg
Book Image

WordPress 3 Plugin Development Essentials

By: Everett Griffiths, Brian Bondari, Matt Mullenweg

Overview of this book

WordPress is one of the most popular platforms for building blogs and general websites. By learning how to develop and integrate your own plugins, you can add functionality and extend WordPress in any way imaginable. By tapping into the additional power and functionality that plugins provide, you can make your site easier to administer, add new features, or even alter the very nature of how WordPress works. Covering WordPress version 3, this book makes it super easy for you to build a variety of plugins.WordPress 3 Plugin Development Essentials is a practical hands-on tutorial for learning how to create your own plugins for WordPress. Using best coding practices, this book will walk you through the design and creation of a variety of original plugins.WordPress 3 Plugin Development Essentials focuses on teaching you all aspects of modern WordPress development. The book uses real and published WordPress plugins and follows their creation from the idea to the finishing touches in a series of easy-to-follow and informative steps. You will discover how to deconstruct an existing plugin, use the WordPress API in typical scenarios, hook into the database, version your code with SVN, and deploy your new plugin to the world.Each new chapter introduces different features of WordPress and how to put them to good use, allowing you to gradually advance your knowledge. WordPress 3 Plugin Development Essentials is packed with information, tips, and examples that will help you gain comfort and confidence in your ability to harness and extend the power of WordPress via plugins.
Table of Contents (19 chapters)
WordPress 3 Plugin Development Essentials
Credits
About the Authors
About the Reviewers
www.PacktPub.com
Preface
Index

Testing WordPress version


We demonstrated this in our chapter about Social Networking, but here it is again, this time adapted for use in a testing class. You can add this to your plugin's dedicated testing class and reference it by name in your loader.php file:

/**
* Tests that the current version of WP is greater than $ver.
*
* @param string $ver   the version of WordPress your plugin requires in order to work, e.g. '3.0.1'
* @return none      Registers an error in the self::$errors array.
*/
public static function wp_version_gt($ver)
{
   global $wp_version;
   
   $exit_msg = __("MyPlugin requires WordPress $ver or newer. 
      <a href='http://codex.wordpress.org/Upgrading_WordPress'>Please update!</a>");
      
   if (version_compare($wp_version,$ver,'<'))
   {
      self::$errors[] = $exit_msg;
   }
}

Back in your loader.php, you would reference this test by name and pass it a minimum required version of WordPress:

// Run Tests.
MyPlugin_tests::wp_version_gt('3.0.1');

You...