Book Image

WordPress Plugin Development: Beginner's Guide

Book Image

WordPress Plugin Development: Beginner's Guide

Overview of this book

If you can write WordPress plug-ins, you can make WordPress do just about anything. From making the site easier to administer, to adding the odd tweak or new feature, to completely changing the way your blog works, plug-ins are the method WordPress offers to customize and extend its functionality. This book will show you how to build all sorts of WordPress plug-ins: admin plug-ins, Widgets, plug-ins that alter your post output, present custom "views" of your blog, and more. WordPress Plug-in Development (Beginner's Guide) focuses on teaching you all aspects of modern WordPress development. The book uses real and published WordPress plug-ins and follows their creation from the idea to the finishing touches, in a series of carefully picked, easy-to-follow tutorials. You will discover how to use the WordPress API in all typical situations, from displaying output on the site in the beginning to turning WordPress into a CMS in the last chapter. In Chapters 2 to 7 you will develop six concrete plug-ins and conquer all aspects of WordPress development. Each new chapter and each new plug-in introduces different features of WordPress and how to put them to good use, allowing you to gradually advance your knowledge. This book is written as a guide to take your WordPress skills from the very beginning to the level where you are able to completely understand how WordPress works and how you can use it to your advantage.
Table of Contents (14 chapters)
WordPress Plugin Development
Credits
About the Author
About the Reviewer
Preface
Index

Adding a Digg button using JavaScript code


Our Digg link works fine for submitting the content, but isn't very pretty, and does not show the number of Diggs we received. That is why we need to use a standard Digg button.

This is accomplished by using a simple piece of JavaScript code provided by Digg, and passing it the necessary information.

Time for action — Implement a Digg button

Let us implement a Digg button, using information from the Digg API. We will use the newly created button on single posts, and keep the simple Digg link for all the other pages.

  1. Create a new function for displaying a nice Digg button using JavaScript code.

    /* Return a Digg button */
    function WPDiggThis_Button()
    {
    
    global $post;
    
    // get the URL to the post
    $link=js_escape(get_permalink($post->ID));
    
    // get the post title
    $title=js_escape($post->post_title);
    
    // get the content
    $text=js_escape(substr(strip_tags($post->post_content), 0, 350));
    
    // create a Digg button and return it
    $button="
    <script type...