So I figured I’d share the spotlight with 9 other people that make up the top 10, and help introduce you to them. Here they are!

1. Joost de Valk (@yoast)

Joost (pronounced “Yoast”) is a prolific WordPress blogger, author of some sweet WordPress plugins, SEO Expert, and host of the very popular new podcast called Press This.

I highly recommend you follow him. He definitely deserves the top spot.

2. WPlimits (@wplimits)

This account is managed by Nathan Barry. I’m not very familiar with this account, it seems to be a good source of WordPress related articles, themes, and plugins from around the net.

3. Brian Gardner (@bgardner)

Of course, my good friend Brian is someone you should definitely be following. Brian is the founder of the Premium Theme movement in the WordPress community via his Revolution Theme (now StudioPress), and he’s definitely an influential twitter-er among WordPress users.

4. Adii (@adii)

Adii, who’s first claim to fame was the popular “Premium News Theme”, has gone on to become the co-founder of WooThemes where he and the guys produce some of the most visually stunning themes in the market. He is also a sharp entrepreneur who is kind enough to share his insights on his blog throughout the week.

5. Ian Stewart (@iandstewart)

The man who started the craze around theme framworks with his Thematic theme, Ian is also a savvy WordPress blogger and Twitter-er. He usually shares links and resources via his twitter account, as well as his newest project, WPazo.com (@WPazo).

6. Nathan Rice (@nathanrice)

That’s me!

7. Theme Forest (@themeforest)

As many of you know, Theme Forest has made a splash in the WordPress community by taking a new direction in the world of Premium Themes. They allow users to submit themes to their site and sell them, splitting the profits. This unique model has created one of the largest Premium Theme outlets on the net.

Like other Twitter-ers on this list, they routinely share helpful WordPress resources via their twitter account.

8. Mark Jaquith (@markjaquith)

Mark is lead developer on the WordPress project, so if anyone knows what he is talking about, it’s him. Follow him for the raw WordPress nerdery, as well as the awesome libertarian eloquence!

9. Jean-Baptiste Jung (@catswhocode)

The guy behind the very popular WPRecipes.com and CatsWhoCode.com. If you’re looking for some seriously helpful WordPress and Web Development resources around the net, look no further. The stuff he publishes and links to is killer.

10. Roger Byrne (@imrogb)

Another name I’m not familiar with. Roger is a social media expert who works at Envato (the guys behind ThemeForest), so he’s probably worth following. 20,000 people already are!

Honorable Mentions

A couple of notable characters are missing from the list, most likely because they haven’t added themselves at the WeFollow.com directory. It’s only right that I mention them here:

1. Jeff Chandler (@wptavern & @jeffr0)

Jeff is the host of the popular WordPress Weekly podcast. He also runs WPTavern.com (blog and forum) where discussions of all things WordPress happen on a daily basis. If you want to pow-wow with the WordPress big-wigs, go get yourself an account and start posting.

2. Chris Pearson (@pearsonified)

Chris is the author of one of the best premium themes in the market, Thesis. He’s also a HUGE personality and is worth following, if for no other reason than his sharp wit and “linguistic porn” (as he calls it).

3. Justin Tadlock (@justintadlock)

Justin is one of the most knowledgeable WordPress developers in the community. His claim to fame is is deep commitment to his Theme Hybrid community where he does some killer work on the free WordPress theme, Hybrid. He also writes some killer articles at his blog that will teach you how to make WordPress bend to your will! You will learn something by following Justin.

4. Matt Mullenweg (@photomatt)

Of course, no list of WordPress Twitter-ers would be complete with out the founder of WordPress, Matt Mullenweg. It’s mostly an aggregation account, but it’s still worth following if you are a fan of WordPress.

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2. Make Money, Get Busy, and Forget to Innovate
3. 10 Sites That Produce Quality WordPress Content
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5. Premium WordPress Themes?

Of course, there are a couple of options already available to you: you can make IE6 crash when users visit, you can move on to bigger and better things and ignore IE6 altogether, or you can do like I do and display a little message to IE6 visitors encouraging them to upgrade (this plugin makes that pretty easy).

But, if you’re not in the business of pandering to inferior browsers, but you don’t necessarily want to be seen as a jerk, I have a solution that might work out perfectly for you.

Let’s Do Some Browser Detection

True, it’s not perfect. But as we’ve pointed out before, browser detection can go a long way towards delivering a smooth experience for users of all browsers.

What we want to do is detect the visitor’s “User Agent”, then tell WordPress to use the default theme (that is, the Kubrick theme) whenever an IE6 user visits our site. So, we do a little PHP magic to detect the User Agent.

if (strpos($_SERVER['HTTP_USER_AGENT'], 'MSIE 6') !== false) {
	// do something
}

This IF statement will evaluate whether or not the user’s browser is reporting IE6 as the User Agent. It should be noted that some browsers allow users to spoof their User Agent. So it is theoretically possible that someone is spoofing an IE6 User Agent and forgot to switch back. Possible, but very unlikely.

Tell WordPress to Use the Default Theme

So, now that we know whether or not the visitor is using IE6, we need to tell WordPress do something with that information. Fortunately, WordPress offers some filters for us to use. The code looks something like this (including the browser check from above):

add_filter('template', 'serve_default_to_iesix');
add_filter('option_template', 'serve_default_to_iesix');
add_filter('option_stylesheet', 'serve_default_to_iesix');
function serve_default_to_iesix($theme) {
	if(strpos($_SERVER['HTTP_USER_AGENT'], 'MSIE 6') !== false)
		$theme = 'default';

	return $theme;
}

Making the Plugin

Because this bit of functionality is used to determine which theme gets loaded, this is one of the few things that you can’t do using your theme’s functions.php file … you have to actually use a plugin. But no worries … here’s exactly what the plugin code should look like:

<?php
/*
Plugin Name: Serve Default to IE6
Plugin URI: http://www.nathanrice.net/blog/serve-ie6-visitors-the-default-wordpress-theme
Description: This plugin will serve the default theme to any visitors using IE6.
Author: Nathan Rice
Author URI: http://www.nathanrice.net/
Version: 1.0
*/

add_filter('template', 'serve_default_to_iesix');
add_filter('option_template', 'serve_default_to_iesix');
add_filter('option_stylesheet', 'serve_default_to_iesix');
function serve_default_to_iesix($theme) {
	if(strpos($_SERVER['HTTP_USER_AGENT'], 'MSIE 6') !== false)
		$theme = 'default';

	return $theme;
}
?>

And if you aren’t the best “copy and paste”-er, here’s a download link. Just upload the plugin and activate, and you’re good to go.

Please note that, because this functionality relies on dynamic template serving, it will be incompatible with plugins like WP-Super-Cache.

There you go! Now, whenever someone visits with IE6, they’ll be seeing your site courtesy of the Default theme. But you don’t have to stop there … if there is another theme in your wp-content/themes directory that you’d like to use instead of the default theme, just find its directory/folder name and replace ‘default’ with the directory/folder name of the other theme you’d like to use (case sensitive). For instance, if you’d like to use the “classic” theme, you’d modify the code above like so:

...
	if(strpos($_SERVER['HTTP_USER_AGENT'], 'MSIE 6') !== false)
		$theme = 'classic';
...

Pretty cool, eh?

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1. Browser Detection and the body_class() Function
2. Know Your Audience: The Browser War
3. WordPress Theme Viewer — Still Crippled
4. The Problem With “Theme Options”
5. Premium WordPress Theme – Proximity News Theme

What’s That? A New Premium Theme Shop?

As you know, I live and breathe WordPress code (pretty much). I’ve written countless tutorials, built themes, written plugins, even submitted a patch or two to the WordPress core. Let’s just say that when it comes to WordPress, I know my stuff, some of which has recently been added as new functionality to the themes at StudioPress.

So it should go without saying that if I’m going to be helping run my own WordPress business, it’s going to be top-notch quality with some solid code. You can count on it.

I was, however, late to the party, so I haven’t had a real chance to get my hands dirty with any of the code there at ModThemes.com, but I’m currently busy on several projects that will have my signature solid code foundation that I’ve worked so hard to develop.

What is ModThemes All About?

The three things that I think make a Premium WordPress theme are the following:

1. Killer Design
2. Solid Code / Awesome Features
3. Superior Support

Seriously, I think that about covers it. And that’s our commitment to our users. We want to provide beautiful, functional themes, and if you need help after the sale, we want to be there for you.

So if you’re ever in the market for a new theme for you site, or for one of you clients, do yourself a favor and check ModThemes.com out first.

We’ll Sweeten the Deal

If you’re interested in purchasing our Breaking News Theme this week, we’re offing a 15% off “launch special”. All you need to do is enter discount/coupon code “LAUNCH” at checkout and you’ll get an instant 15% discount. Not bad, eh?

But act fast. That discount code is only good for the first 50 people that use it. For other deals and discounts, as well as news about new themes, prerelease teasers, and other cool stuff, be sure to follow @modthemes on Twitter, or of course, follow me @nathanrice on Twitter.

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2. Digest
3. Premium WordPress Themes?
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5. NewsPixel – A Newspaper WordPress Theme that Rocks!

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5. Free Installation for NewsPixel — This Week Only!

For the last several months, I’ve been quietly developing a theme framework for iThemes — a framework we could use to offer solid code, killer designs, and futureproofing (one of our most common requests at iThemes).

A couple of weeks ago, I invited a few people to join a private beta of the theme (called Prodigy, in case you hadn’t gathered), and it has been silky smooth. Hardly any complaints or bugs, and TONS of compliments. So, I think the theme is ready for a public beta, and you’re all invited!!!

Just to be clear, this theme is definitely for developers (right now). After a little more work getting the framework settled, we’ll start pumping out some killer designs based on the Prodigy framework and everybody will be able to enjoy the benefits of Prodigy. Until then, I’d recommend waiting unless you are somewhat comfortable with PHP and CSS.

The Default Child Theme

Prodigy, by itself, is pretty ugly. It’s completely unstyled. But I’ve created a default theme for Prodigy called “Legacy” that will serve as a sample theme for you to use as your guide to creating child themes with Prodigy. To see it in action, head over to Prodigy Central and take a look around. Yes, it’s simple, minimalistic, and bare-bones. But it does offer a solid typographic foundation to build on, and with a splash of color via CSS, it could look pretty darn sweet.

Oh yeah, both Prodigy and Legacy are both COMPLETELY FREE, and always will be. We’ll probably develop some commercial child themes in the future, but the framework itself will always be 100% free and GPL.

What Makes Prodigy So Special?

Well, that’s a hard thing to explain. What I tried to accomplish with Prodigy is offer an HTML framework that could be utilized out of the box, but could be easily extended or replaced with your own creation by taking extensive advantage of Hooks. These hooks are scattered throughout various locations in the HTML output, offering you endless options for inserting custom code exactly where you want it without editing core files.

If that sounds like gibberish to you, fear not. There will be a variety of awesome tutorials to come shortly that will explain all these concepts in greater depth, with some real-world examples.

Along with offering a solid HTML framework, I’ve added some killer SEO options that make fine-tuning your SEO a breeze. The theme takes care of most of the work, but there are a few options that you can tweak from within the post/page edit screen. Take a look:

As you can see, Prodigy makes it super-easy to control the SEO of each individual post/page.

I could go on forever. There are functions to easily create new widget areas, feedburner redirection (say bye-bye to the Feedsmith plugin), hooks all over the place, included reset.css and WordPress recommended styles, and other stuff that just can’t be explained.

So How Do I Become a Beta Tester?

Easy … just follow the instructions at Prodigy Central. You can either download the ZIP or you can pull the code directly using SVN (which I highly recommend).

All I ask is that you help provide constructive feedback for me so I can make the theme better. I want this entire project to be one of the best themes available, and I can’t do that without you.

Providing Feedback

I’ve set up a P2 site that lets us talk about Prodigy features, bugs, requests, etc. If you would like access to post to that blog (the equivalent of starting a forum thread) just email me and I’ll set you up an account. Be brutal, but be courteous. I want to make the theme everything you want it to be, so I’m very interested in hearing your thoughts.

Also, I’m a VERY active Twitter user (follow me @nathanrice) and I’ve chosen #prodigywp as the official hashtag for Prodigy discussion on Twitter. Just hashtag your tweet with #prodigywp and I will absolutely see it, along with the rest of the Prodigy community. And if you want to track the conversation around Prodigy on Twitter, just follow the #prodigywp hashtag in your favorite Twitter client, or on search.twitter.com.

Oh, and By the Way

The site you’re looking at right now (NathanRice.net) was build completely on the Prodigy Framework as a child theme. It just goes to show you how flexible frameworks are, and how much the Prodigy offers you in the way of extensibility and flexibility. Yes, you CAN create a site like this one, and much more complex sites too, all on top of the Prodigy Framework, without ever editing core code.

Related posts:

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2. Premium WordPress Theme – Proximity News Theme
3. An Introduction to WordPress Action Hooks
4. 10 Sites That Produce Quality WordPress Content
5. NewsPixel – A Newspaper WordPress Theme that Rocks!

The conclusion? The PHP files in WordPress themes must inherit the GPL, but CSS and Images do not. From the email:

The PHP elements, taken together, are clearly derivative of WordPress code.

Obviously, since many premium theme developers, including iThemes, have adopted the GPL completely for their themes, including CSS and Images, this news doesn’t make a big difference for us.

But because neither side can claim they were 100% correct, the declaration is bittersweet to those on both sides of the issue.

Those claiming that themes must be completely covered by the GPL can no longer claim that:

… the images and CSS are not [subject to the requirements of the GPL]. Third-party developers of such themes may apply restrictive copyrights to these elements if they wish.

But those claiming that they can license their themes — in their entirety — under a restrictive license seem to have been in the wrong as well. Or were they?

In the last paragraph of the email, it seems there is, at the very least, a potential loophole.

Finally, we note that it might be possible to design a valid WordPress theme that avoids the factors that subject it to WordPress’s copyright, but such a theme would have to forgo almost all the WordPress functionality that makes the software useful.

If it’s possible, though not ideal, for a WordPress theme to run independent of WordPress itself, then one must assume (at least from the wording of that paragraph) that the PHP code isn’t necessarily required to be subject to the requirements of the GPL.

Obviously, this is the first time anyone has been able to speak about the issue with authority, so this is helpful. But I’m afraid this story isn’t over yet.

I, obviously, support licensing themes (free or paid) under the GPL. But despite this latest news, I’m still very reluctant to say that the legality of the issue has been completely cleared up. There are still too many questions, and not nearly enough answers. One thing is for sure, theme authors have been adopting the GPL all over the place lately. And WordPress just launched their commercial GPL theme directory today. Perhaps the legality of all this GPL talk doesn’t even matter any more.

What do you think?

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If I pick your question, I’ll answer it (in as much detail as necessary) here on the blog, and link to you as the source of the question.

Hopefully this will be a BIG help to everyone out there, and make for some really good conversation! Leave your questions in the comments.

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Even though we both believed that we would have been within our rights to copyright the entire work, we decided that we would license all WordPress code in our themes (function calls, loops, etc.) as GPL, and protect our images, stylesheets, etc., under a copyright. We felt it was a good compromise.

Ever since then, we’ve been internally debating the subject, going back and forth over the benefits vs. risks involved with licensing our themes completely under the GPL, and have finally decided, in the interest of our users, and the WordPress community at large, that we should cover all our themes, in their entirety, with the GPL license.

What This Means for Us

Not much is going to change here. We’ll still continue to bring premium WordPress themes to our customers on a regular basis. For us, this was about respecting the license of the platform upon which we build our themes, WordPress.

What This Means for Future Customers

Again, not much is going to change there either. The themes will still be the product, and they will continue to be “for sale”. However, because we are adopting a less restrictive license, there are a couple of changes that will have to happen:

• All our themes will be “multiple use”
• Prices will likely drop
• Our support model will likely change

But for previous customers, don’t worry, nothing much is going to change for you. The only difference is that if you purchase a “single use” package sometime in the past, you are now free to use the theme on as many sites as you would like.

Yes, iThemes Is Now 100% GPL Compliant

So there you go. Though it wasn’t a huge change from our previous license, we do want to celebrate. Ultimately, this is good for everyone. We understand that there will likely be some questions and concerns, so please don’t hesitate to let us know in the comments below, or sending an email to us. We’ll do our best to answer everyone who emails us.

You can also go and read the official announcement from iThemes.

What do you think? Do you consider this a good move? A bad move? Let me know in the comments below. I’m very interested in what everyone thinks.

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5. Creating a “Blog Page” — With Paging

In fact, one of the biggest barriers to using what is referred to as a Theme Framework or creating their own plugins is the fact that they rely heavily on Action Hooks to function properly.

Understanding this concept accelerated my level of development skills immediately after I figured out what hooks were, and how they worked. And today, I want to help you find that path too.

So, What Are WordPress Action Hooks?

This can be a very easy, and a somewhat difficult thing to explain. Action hooks are essentially placeholders. Wherever an action hook is placed, it will execute any code that has been “hooked” to it.

So, let’s try to visualize this with some default WordPress action hooks that are in most themes. You can find wp_head and wp_footer in just about every single theme available, and most people don’t realize these are action hooks. They’re simply placeholders that plugins can use to insert code into the <head> and footer of the theme. Often times, they use these action hooks to insert things like CSS or Analytics code. They create a function that generates the code, and then “hook” that function to either wp_head or wp_footer.

If I could wrap up the concept in one sentence, it would be this: WordPress action hooks are a means of providing a way for other developers to insert their own code in specific locations within your code, in order to change or expand the functionality of your code.

Why Action Hooks Are Necessary

Like any other major piece of software, WordPress evolves. Every few months a new version is released.

Let’s assume that action hooks didn’t exist, but you wanted to change or extend some function of WordPress. In order to do this, you have to modify core WordPress files. And when it comes time to upgrade, you’re left with a choice: do the upgrade and lose all my modifications, or stay with the old version.

But if you use action hooks to modify how WordPress works, you can upgrade knowing that your mods are in a separate file which makes the changes the correct way, and you won’t be in danger of having those mods overwritten during the upgrade.

How Do Action Hooks Work?

Going back to the example of the wp_head and wp_footer actions, let’s assume that you wanted to insert some CSS in your <head> section of your theme so that you can override the link colors.

(don’t worry about the “what” so much. the “how” is much more important here).

The first thing you need to do is create a function that inserts the code. Because action hooks only allow functions to be “hooked” to them, we’ll need to create a function that generates the code:

function insert_some_css() {
	echo <<<CSS
<style type="text/css">
	a {
		color: #08FF00; /* green */
		text-decoration: none;
	}
	a:hover {
		color: #FF0000; /* red */
		text-decoration: underline;
	}
</style>
	CSS;
}

So, once you have your function constructed, it’s time to “hook” the function to the wp_head action hook. It’s pretty easy:

add_action('wp_head', 'insert_some_css');

In layman’s terms, that line of code is saying, “Whenever the wp_head action shows up in the theme code, execute the insert_some_css function.”

My final code usually looks something like this:

add_action('wp_head', 'insert_some_css');
function insert_some_css() {
	echo <<<CSS
<style type="text/css">
	a {
		color: #08FF00; /* green */
		text-decoration: none;
	}
	a:hover {
		color: #FF0000; /* red */
		text-decoration: underline;
	}
</style>
	CSS;
}

It’s really not a difficult concept, if you think about it. All you need to do is find an action hook that you want to use to output some code, create a function, and hook the function to that action using the add_action code I gave you above.

As always, be sure any PHP code is placed between opening and closing PHP tags, or it will not execute.

Creating Your Own Action Hooks

While WordPress does provide you with a LOT of action hooks that you can take advantage of, you can create your own too, giving your theme or plugin the same benefit of letting other people make changes to your code, without having to edit your code.

So, if you want to provide an action hook that will execute any functions that are “hooked” to it, just use this code:

<?php do_action('my_action_hook_name'); ?>

Of course, change the my_action_hook_name to something unique that describes the location and/or purpose of the action hook.

And now, anyone can come along and hook their own function to your newly created action hook.

Other Sources on Action Hooks

• Ian Stewart explains action hooks for Child Themes
• Raymond Selda explains the concept, with examples
• The Codex page for Plugin API has some good info
• The Codex lists all the default actions hooks you can use

So, now you know what the fuss is all about. Take it for a spin, and let me know what you think of it in the comments. And if you have any questions, I’d be happy to try to answer them.

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2. Stripped Theme Released
3. How To Redirect a Page Using Custom Fields in WordPress
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Why would you need to do this? Well, if you want to add a link to your navigation menu, instead of editing code, you could just create a new page, and have that page redirect your users to the URL you specified. I’ve had clients in that situation before, and this code has come in pretty handy for them.

Adding the URL to the Custom Field

The first thing you need to do is create a new page, or edit an old one. Scroll down past the page content to a section labeled Custom Fields.

You should see something like this:

If instead of seeing a text box on the left, you see a dropdown menu, just click the link that says Enter new and it will bring up the text box.

In that first text box (labeled Name), type in the word redirect, and in the second box (labeled Value, type the URL you want to redirect this page to. Then, click the Add Custom Field button.

Finally, either save or publish the page.

Editing Your Theme

After you’ve done this, you’ll need to add some code that will actually detect that you’ve created a custom field, and do the redirect. This will require a very minor edit to your theme, but don’t worry, it’s only 3 lines of code, and all you have to do is paste it in and save.

Open up your theme folder and look for a file called page.php. Open it up in your favorite text editor (not word processor) and look at the very top and locate this code (or something very similar):

<?php get_header(); ?>

All you need to do is change that, to this:

<?php
global $post; // < -- globalize, just in case
$field = get_post_meta($post->ID, 'redirect', true);
if($field) wp_redirect(clean_url($field), 301);
get_header();
?>

As you might have noticed, we’re using one of the 5 WordPress Functions You Didn’t Know Existed in this little code snippet, clean_url(). This just does some basic sanitation of the URL, just in case you pasted it in incorrectly. We’re also using the wp_redirect() function (source & Codex), which we didn’t cover in the 5 WordPress Functions You Didn’t Know Existed post, but it is definitely a good one. It takes a URL input, along with the type of redirect (in our case, a 301 permanent redirect), and does the redirect for us.

And that’s it. You’re done. Now, when a user visits your site and clicks on that page, they will be taken to the URL you specified in the custom field.

Isn’t There a Plugin for This?

Yes, and I wrote it. If you don’t want to mess around with editing code, you can completely skip that step, and instead, download and install my Custom Field Redirect WordPress plugin. Also, WordPress developer extraordinaire Mark Jaquith has a similar plugin called Page Links To. Either one will work fine for redirecting a page to a different URL.

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2. Creating a “Blog Page” — With Paging
3. Ultimate Guide to WordPress SEO – Optimized Titles
4. Definitive Sticky Posts Guide for WordPress 2.7
5. WordPress Single Post Templates

I track a lot of WordPress content daily, so I’m happy to sort through the noise for you. My list is lean and mean, and I don’t mind sharing. Be sure to subscribe to the RSS feeds and/or follow them on twitter too.

Here are 10 sites I highly recommend if you are looking to expand your understanding of WordPress, or keep up with what’s going on in the community.

1. wpazo.com

Visit Site — @wpazo on twitter
Started by Ian Stewart (@iandstweart), this site doesn’t produce content, but rather scours the internet and finds the good stuff for you. The blog is fairly young, but I’ve been incredibly impressed with the caliber and frequency of content it promotes. Your humble blog author has been featured several times in the last few days, so you know Ian’s got good taste. :-)

2. WPEngineer.com

Visit Site — @wpengineer on twitter
WPEngineer is definitely one of my favorites. They feature new posts on a fairly regular basis, and the content is solid and understandable. They cover both simple and more technical content, but it’s done in a very understandable way.

3. WPRecipes.com

Visit Site — @catswhocode on twitter
I love this concept. Take an idea (a recipe) and write a short, concise, extremely useful article explaining how to do it. I wouldn’t even call it an article. It’s basically one sentence describing what they’re trying to accomplish, and a code blog that demonstrates how to accomplish it. No fluff.

4. WPTavern.com

Visit Site — @wptavern on twitter
Jeff Chandler (@jeffr0) has done an amazing job of forming a vibrant and growing community around this concept. His site features both a blog and a forum where WordPress news, ideas, themes, plugins, and everything else WordPress gets discussed. This is definitely a resource you want to keep up with.

5. JustinTadlock.com

Visit Site — @justintadlock on twitter
Though he doesn’t produce content too often, when he does, it’s almost always useful. Definitely not for the faint of heart, Justin’s articles are going to dig deep into WordPress coding, but you’ll definitely learn something new. Justin is also the author of the Hybrid theme, a WordPress theme framework which, no doubt, powers thousands of WordPress blogs.

6. WeblogToolsCollection.com

Visit Site — @laughinglizard on twitter
The big daddy. WLTC is no doubt the most popular blog about WordPress out there. Mark Gosh and his team produce DAILY content on WordPress news, events, themes, plugins, and tutorials. It’s pretty much got everything you might want. If you’re not already subscribed, then you’ve probably been living in a bomb shelter since 1999. Come on out, and give WLTC a look-see.

7. PlanetOzh.com

Visit Site — @ozh on twitter
Ozh is probably best known for his plugin development, but he also writes tutorials on his process and methodology, which is invaluable for someone looking to get into plugin development. I personally owe a good portion of what I know about plugin development to Ozh. I used his source code to teach myself. Great guy. Great content. Great site.

8. ProBlogDesign.com

Visit Site — @problogdesign on twitter
While not technically a blog about WordPress, Michael does write WordPress tips and tutorials quite often, making this a resource worth having in your feed reader. Every tutorial I’ve ever read from them is clear and easy to follow. I’m a subscriber, and you should be too.

9. ThemeShaper.com

Visit Site — @iandstewart on twitter
The home of the Thematic theme framework for WordPress, Ian has built a large community of users and fans there. Many of the tutorials are Thematic specific, but they often apply to WordPress in general too. At the very least, you’ll meet a cool guy and download a slick theme.

10. WP-Fun.co.uk

Visit Site — @andrew_rickmann on twitter
WordPress coding guru Andrew Rickman runs this blog. More technical in nature, WP-Fun does cover deeper topics, but in an understandable way, and also does plugin reviews, talks about open source philosophy, and other things that I think you’ll enjoy. Plus, Andrew is another very cool person you’ll be glad you met.

Related posts:

1. Centralization of WordPress Content
2. WordPress 2.7 Admin Sneek-Peek
3. Premium or Freemium?
4. Where I’ve been, and What’s Next
5. Community, Self-Respect, and Free WordPress Themes

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5. Talking WordPress: Not Bad At All!

So, I compiled a list of some of my favorites. Some are simple and can be used by pretty much everyone; others have less common uses; but, all of them are incredibly useful.

1. wp_mail()

The wp_mail() function is essentially a super-easy function that allows you to easily send an email to anyone you want by just passing a few simple arguments. For example:

<?php
$to = 'user@example.com';
$subject = 'Hello from my blog!';
$message = 'Check it out -- my blog is emailing you!'

$mail = wp_mail($to, $subject, $message);

if($mail) echo 'Your message has been sent!';
else echo 'There was a problem sending your message. Please try again.';
?>

You can also specify third and fourth parameter, $headers and $attachments. Seriously, this function takes all of the heavy lifting out of sending pretty much any kind of email you can think of.

You can check out the function reference on the Codex here, or you can check out the source code for the function here (which I highly recommend).

2. wp_loginout()

This function gives us the ability to display a “Login” link on our theme, so we can easily log in without having to manually type in the /wp-admin/ or /wp-login.php URL. But it goes beyond just that. If we’re already logged in, instead of displaying a “Login” link, it displays a “Logout” link that allows us to log out of our account without having to visit the dashboard.

This function is incredibly useful for theme authors, since it does all the logic for you. If you’re still manually adding the link to login our logout, you’re wasting your time. Do yourself a favor and use wp_loginout().

You can check out the template tag reference on the Codex here, or you can check out the source code for the function here.

3. clean_url()

This function takes a URL input and tests it to make sure it is structured correctly. It can add the http:// to the front of a URL if it’s missing, it converts ampersands to their correct HTML character, and a few other things that fix poorly structured URLs.

There are use-cases a-plenty, but the one that comes to my mind is the ability to let a user enter a URL in a theme options or plugin settings page, and NOT require them to “include http://“. If the function did nothing else, that alone would make it useful to me.

You can check out the function reference on the Codex here, or you can check out the source code for the function here.

4. wpautop()

This function is converts line breaks in strings of text to <br /> tags, and makes a double line break into a new paragraph by ending the first paragraph, </p>, and starting a new one, <p>. It also opens and closes the entire string with paragraph tags, so the whole thing is formatted correctly.

If you are ever storing strings of text in a database that you need to display on the front end, but wondered how to turn those line breaks into valid HTML during output, this is the function for you. In fact, this is the function WordPress uses to format posts when outputting the_content().

You can check out the function reference on the Codex here, or you can check out the source code for the function here.

5. wp_rss() / get_rss()

These functions can pull in data from an RSS feed, parse it, and (depending on how you handle it) can display the data in a useful format like a list with links.

I’ve used these functions on several client sites where they wanted me to pull in stories from other news sources to be displayed in a section of their website. All you need to do is provide an RSS feed address, and the function(s) do(es) the hard work.

One caveat is that you do need to do a PHP include before you can use these functions. It’s only one extra line of code though:

<?php
include_once(ABSPATH . WPINC . '/rss.php'); // < -- this is the include call
wp_rss('http://example.com/rss/feed/goes/here', 5); // <-- this is the function
?>

You can check out the function reference for wp_rss() here, or get_rss() here, or you can view the source code for each of the functions here.

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2. ElegantBlue 1.1: Bug Fixes
3. WordPress 2.3 Theme Backward Compatibility
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5. An Introduction to WordPress Action Hooks

One of the more frustrating things about coding for the web is the fact that different browsers often render the same code differently than one another. Wouldn’t it be nice if we could apply certain CSS styles to just the browsers that need it? With the new body_class() function, and a little code magic on our part, and you’ll be able to do just that.

It should be noted that this article will be a bit more involved than some of the others on this site. There will be a lot of assumptions made about your level of coding experience.

Leveraging the Tools WordPress Provides

Many people don’t know this, but WordPress provides several global variables that we can use to do browser detection. Once again, browsing around the WordPress source code pays off.

The variables WordPress provides are as follows:

• $is_lynx
• $is_gecko
• $is_IE
• $is_winIE
• $is_macIE
• $is_opera
• $is_NS4
• $is_safari
• $is_chrome
• $is_iphone

Each variable has a value of FALSE by default, and is switched to TRUE if the condition is true. For example, if the user loads a page using Firefox, the $is_gecko gets a value of TRUE.

This list may not be as extensive as we might like (browser versions, platforms, etc.), but it is a really good start.

Building the Browser Detection Function

Now that we know that WordPress is doing simple browser detection for us, we can use this data to add classes to the output of the body_class() function. And in order to add those classes, we’re going to use a method that I outlined yesterday — we’re going to filter the classes using the body_class filter. Here’s the final code — I’ll explain what’s going on afterwards.

<?php
add_filter('body_class','browser_body_class');
function browser_body_class($classes) {
	global $is_lynx, $is_gecko, $is_IE, $is_opera, $is_NS4, $is_safari, $is_chrome, $is_iphone;

	if($is_lynx) $classes[] = 'lynx';
	elseif($is_gecko) $classes[] = 'gecko';
	elseif($is_opera) $classes[] = 'opera';
	elseif($is_NS4) $classes[] = 'ns4';
	elseif($is_safari) $classes[] = 'safari';
	elseif($is_chrome) $classes[] = 'chrome';
	elseif($is_IE) $classes[] = 'ie';
	else $classes[] = 'unknown';

	if($is_iphone) $classes[] = 'iphone';
	return $classes;
}
?>

The first thing you’ll notice is that we had to globalize all the conditional variables. This is something PHP requires in order to use variables that are defined outside the function.

Once we’re able to use the variables, we use a simple IF ... ELSEIF ... ELSE statement to check if the different conditions are true. If they are true, then we add the corresponding class. If they are not true, then we move along.

You’ll also notice that I checked the value of the $is_iphone variable in a different IF statement. That is because when browsing with an iPhone, you are also using Safari. Therefore, if I had checked the $is_iphone variable in the first IF statement, either the “safari” or “iphone” class wouldn’t have gotten added to the $classes[] array.

If, for whatever reason, the server can’t detect what type of browser the user is using, it will add an “unknown” class to the $classes[] array.

Finally, we return the $classes array with the new browser classes added to it.

The Result

The final result will look something like this, if you view the source code of your page:

<body class="home blog logged-in safari">

How to Use the Browser Body Class

Now that we have the <body> tag outputting a class for the browser we’re using, we can use CSS to target particular styles to elements being viewed in certain browsers. For instance, let’s say this was my default link style:

a {
	color: blue;
	text-decoration: underline;
}

Now, let’s make the links a different color when a user views the site in FireFox:

.gecko a {
	color: red;
	text-decoration: underline;
}

Notice, all I had to do was prepend the browser class-selector to the style, and now, any time someone using FireFox visits my site, all their links will be red, instead of blue.

One of the most useful applications I’ve discovered is the ability to target Internet Explorer with certain styles. It’s great to be able to just apply slightly different styles to certain elements in order to account for the many bugs in Internet Explorer.

So there you go! You can now use the new WordPress body class function, and the built-in browser detection in WordPress to add new CSS classes to your <body>.

Further Reading

Here are some other resources that you might find useful when trying to do browser detection, if you want to make your function even more thorough:

• The PHP get_browser() function
• Using the $SERVER['HTTP_USER_AGENT'] variable

Related posts:

1. WordPress 2.8 and the body_class() Function
2. Serve IE6 Visitors the Default WordPress Theme
3. Know Your Audience: The Browser War
4. An Easy Way To Get the Contents of a Custom Field
5. Definitive Sticky Posts Guide for WordPress 2.7

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Beginning in WordPress 2.8, themes will be able to take advantage of the body_class() function to place location-specific classes on the opening <body> tag, usually located in the header.php file of most themes.

Why is this significant? Easy … this opens up the ability to change the look of nearly everything with CSS only.

Before we get into the application of the body_class() function, let’s cover some technical details first.

What body_class() Generates

The body_class() function operates in nearly the exact same manner as the post_class() function that was introduced in WordPress 2.7. The only differences are the classes it generates. The body_class() function will generate the classes mostly based on where your viewer is on your site.  For instance, if a viewer is on your homepage and you haven’t set a static page for your homepage, then the classes the function might generate might look like this:

<body class="home blog">

Notice, those are two separate classes, either of which you can use as a selector.

However, if you are on a particular post, the body tag might look like this:

<body class="single postid-64">

And if you are currently looking at a page, then body_class() will generate something like this:

<body class="page page-id-3 parent-page-id-0 page-template-default">

Essentially, body_class() will generate dynamic CSS classes based on the type of content, and under what circumstances, you are currently browsing. For instance, if you are a registered user, and are currently logged in, body_class() will generate a logged-in class on the body tag.

The following is a full list of possible body classes (HT: WPEngineer.com):

• rtl
• home
• blog
• archive
• date
• search
• paged
• attachment
• error404
• single postid-(id)
• attachmentid-(id)
• attachment-(mime-type)
• author
• author-(user_nicename)
• category
• category-(slug)
• tag
• tag-(slug)
• page
• page-parent
• page-child parent-pageid-(id)
• page-template page-template-(template file name)
• search-results
• search-no-results
• logged-in
• paged-(page number)
• single-paged-(page number)
• page-paged-(page number)
• category-paged-(page number)
• tag-paged-(page number)
• date-paged-(page number)
• author-paged-(page number)
• search-paged-(page number)

How To Add body_class() to My Theme

This is actually the easy part. Assuming you are running WordPress 2.8 (currently in beta, soon to be released), all you have to do is add a new template tag. You’ll need to locate which template file generates the opening <body> tag. This is usually the header.php file.

After you’ve located the <body> tag, just change it to this:

<body <?php body_class(); ?>>

Save the file (and upload to your server, if necessary), and you’re done!

Using Dynamic Body Classes

So, we now have body classes. What’s the big deal? I’ll explain:

With the exception of the HTML element, the <body> tag wraps around all other HTML code. Therefore, by having classes on <body> allows us to target any other element on the page, specific to the current <body> class.

It may just be easier to explain by example.

Let’s say that I have a <div id="content"> that renders on the left, and a <div id="sidebar"> that renders on the right, both within a 960px wide <div id="container">. The content div is 600px wide, and the sidebar is 360px wide. But, when viewing a single post (as opposed to the homepage), I have told my theme to not display the sidebar. Now, we’re left with just a content column. Unfortunately, our container is 960px wide, and our content div is only 600px wide.

We’re stuck with a large blank space where the sidebar used to be. How do we fix that? With a <body> class, it’s easy. We just target the <div id="content"> when it is being displayed on a single post. It would looks something like this in CSS:

.single #content {
	width: 960px;
}

By doing this, we’re saying “if we’re viewing a single post, make the #content div 960px wide”.

We’re basically adding a simple conditional system to CSS.

Adding Classes to body_class()

In some cases, you will want to add your own class(es) to the list of classes that body_class() generates. If you find yourself in this situation, here are a couple of ways to do it.

The first, and easiest, way to add a class to the list of classes the function generates is to simply pass your custom class as a function argument to body_class(). Here’s how you would do that:

<body <?php body_class('my-class'); ?>>

By doing this, we’ve now told the body_class() function to add ‘my-class’ to the list of classes to output.

The second, and harder (but more flexible) way is to use take advantage of a WordPress Filter to add new body class(es). In this case, we’ll be using the body_class filter provided in the get_body_class() function. If you don’t understand how filters work, I’ll do a post on that in the future. Until then, see if you can just follow along. You may pick it up pretty easily.

Here’s an example of how to add a class by using a filter:

<?php
add_filter('body_class','my_body_classes');
function my_body_classes($classes, $class) {
	// add 'my-class' to the $classes array
	$classes[] = 'my-class';
	// return the $classes array
	return $classes;
}
?>

By using this method, we allow ourselves to use conditionals, and other cool things, that we would not be able to use with the first method.

Further Reading

If you want to know more about the body_class() function, here are a few resources I’d recommend:

• Study the source code for the get_body_class() function.
• Check out Demetris’s thoughts on the new WordPress 2.8 features.
• Browse the WordPress 2.8 Overview at the Codex.
• Take a look at the trac ticket that got the ball rolling.
• WPEngineer.com has a good summary of the body_class() function.
• PerishablePress has some good stuff on body_class() usage.

Related posts:

1. Browser Detection and the body_class() Function
2. Creating a “Blog Page” — With Paging
3. WordPress Single Post Templates
4. Definitive Sticky Posts Guide for WordPress 2.7
5. Ultimate Guide to WordPress SEO – META Descriptions

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5. Where I’ve been, and What’s Next

Over the last several weeks, I’ve been a busy working on a few little gems that you might find useful.  I certainly do.

I’ve created a new WordPress Plugins page here as a placeholder. Eventually, each plugin will have its own page.  Check them out and let me know what you think.

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In the mean time, I wanted to let everyone know what’s going on, and what’s coming up.

A Redesign

A brand new, typographically delicious elegant eye-candy is on the way. I’ve commissioned the services of the very talented Blankenship to give me a design I can be proud of, and he won’t disappoint.

The new design will be content-focused. Tutorials will be easier to read, and therefore, I’ll be writing more of them. It’s pretty much what I do best. And when I have a design that can handle all the neat-o tutorials I have waiting in the hopper, expect to see a flood. You WILL understand WordPress better by being subscribed to this blog, I can assure you.

A Cool Plugin

Currently in its beta-testing stage, this new plugin will give WordPress theme authors more flexibility than you can imagine. Here’s what Ptah Dunbar says about it:

WTF Nathan, this plugin is AWESOME! …
That’s a brilliant idea … Do you know how much flexibility you’ve just given to theme authors/bloggers?! I would of never thought of this.

I can’t reveal what the plugin is just yet. But believe me, if you’re a WordPress theme author, you will LOVE it, because it will make your themes SO much more flexible. And on top of it all, it’s modular, so you can include it in your theme, so users don’t have to install the plugin. SWEET!

A Plugin/e-Book Combo

A couple of months ago, this blog landed on the map because of one of the most useful, readable, understandable lesson in WordPress SEO you’ve EVER seen. Most of you are probably subscribed to this blog BECAUSE of that series of posts.

Well, I’m about to make your life even easier.

I’m putting together an e-Book that has all the information in the WordPress SEO series … AND MORE!!! Some of the content of that series needs to be updated and clarified, and now you’ll be able to get the content in the very handy e-Book format.

PLUS … I’ll throw in (at no extra charge) a ROCKIN’ plugin that will handle a good portion of the SEO heavy lifting that you either don’t want to do, or don’t know how to do. This plugin will take your theme to the next level, and will definitely get your websites higher rankings from our Google Overlords.

And, an entire chapter of the e-Book will be dedicated to showing you how to use the plugin. With this combo, you will literally have the SEO 1-2 punch that will get you where you want to go. Go ahead … say hello to the increased traffic.

And Yes, Some Theme Love

Yeah, Elevate is still crunching. But the good news is that Skyye News Theme is done, and available for download for free. Plus, I’ve gone ahead and opened up the support forums, AT NO CHARGE. Yep, click the signup button to get your account. IT’S FREE.

The Instructional Package will be available for Skyye News soon, as will the new themes. Oh yeah, I know you like that.

So, you picked a good time to be a subscriber. This is definitely the place you want to be over the next couple of months. Good to have you aboard.

Oh, by the way, if you haven’t done so already, you owe it to yourself to jump in the conversation with me over on Twitter (@nathanrice).  I love connecting with people there, and that’s where you’ll find me all day.  Believe me, I’m worth following.

Related posts:

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2. 10 Sites That Produce Quality WordPress Content
3. Welcome to NathanRice.net
4. Ultimate Guide to WordPress SEO – Google Sitemaps
5. Proximity Gets Some New Features

So if you’re in the mood for a high quality Premium WordPress Theme for 25% off, head over to iThemes and go nuts.  That’s 25% off your entire order, no limits … and yes, that even includes the Theme Club … a full $100 off!!!

Just use the coupon code CYBERMONDAY at checkout to receive the discount.

Act fast … the deal ends at 12am (midnight) tonight.

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