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As a developer, one of my favorite things about WordPress is its built-in functions, which allow you to easily manipulate and extend WordPress with just a few lines of code. WordPress functions are an essential component of WordPress theme development; once you understand how they work, it's easy to create your own custom WordPress themes.

Two of my favorite web designers with super helpful blogs, Chris Coyier of CSS Tricks and Jeff Starr of Perishable Press, have just released their new collaboration! The book, "Digging Into WordPress," is now available as a PDF download, and if you buy the PDF book now, you will be eligible for a "sweet discount" on the hard copy of the book when it comes out, plus receive updates free. They've done a great job on this book, which covers setting up WordPress, anatomy of a WordPress theme, theme design and development, extending functionality including using WordPress as a CMS, working with RSS feeds, SEO, dealing with comments, and keeping your site "healthy." I already followed both of these designers before they began their collaboration, and have found countless useful tutorials, code snippets, design ideas, and much more on both of their sites - I've relied on Perishable Press as a source for great unobtrusive javascript code, and on CSS-Tricks for all kinds of other useful tools for making valid, functional, and beautiful sites. This book is bound to be a valuable reference to anyone who works with WordPress.

Every web developer should keep useful code snippets in a personal library for future reference. Today, I'm showing you the 10 most useful snippets and functions I have added to my snippet library from the past 3 months.

"The edit_theme_options capability should allow the user to edit the sidebar as described on this page : http://codex.wordpress.org/Appearance_Widgets_SubPanel Code to add to functions.php $role = get_role('editor'); $role->add_cap('edit_theme_options'); Edit: This should work to prevent editor accessing themes or menus function custom_admin_menu() { $user = new WP_User(get_current_user_id()); if (!empty( $user->roles) && is_array($user->roles)) { foreach ($user->roles as $role) $role = $role; } if($role == "editor") { remove_submenu_page( 'themes.php', 'themes.php' ); remove_submenu_page( 'themes.php', 'nav-menus.php' ); } } add_action('admin_menu', 'custom_admin_menu'); I haven't had chance to test this, but it only removes them from the menu they may still be able to access them by typing in the URL directly."

Plug-in is small snippets of code allowing you to add extra functionality to your site! Like, if you want to get idea of the statistics of your site, WordPress.com stats plug-in can help, which helps you measure your number of page view matrix and it can also help you know where your traffic is coming from.

An alternate, fast, accurate search engine for looking up WordPress functions. Highlighted on the WordPress Weekly podcast.

Plugins are great tools, used to improve the functioning of WordPress blogs by incorporating a wide range of useful features. These are usually pieces of code, created specifically to achieve some purpose.