WordPress Plugins archives


On the GPL, Themes, Plugins & Free.

2 July 2009 by Joost de Valk » - 44 Comments

So, we’ve finally got an official word on this, the one sentence summary by Matt reads: PHP in WordPress themes must be GPL, artwork and CSS may be but are not required. Ok, so that’s the final truth, because the Software Freedom Law Center (who are of course absolutely NOT partial in this, even though »

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New Plugin: RSS Shortcode

1 July 2009 by Joost de Valk » - 31 Comments

Yesterday, while working on a project for Springer Uitgeverij, I was amazed to find out there is no simple RSS Shortcode plugin, that simply allows you to do this: And then that would show the feed you’d specified. Well, now there is: the RSS Shortcode plugin. It looks like this, when functioning (with excerpts set »

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Hosting your JS at Google

16 June 2009 by Joost de Valk » - 21 Comments

While in a previous post I talked about WordPress database optimization, with this post I intend to show you how to improve your sites performance a bit more by hosting your javascripts with Google. This only works if you’re using jQuery, prototype or another library that is supported by Google’s AJAX Librararies API. While those »

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What are “custom taxonomies”?

8 June 2009 by Joost de Valk » - 32 Comments

WordPress, with version 2.3, introduced the concept of Tags. As described by Wikipedia, a tag is “a non-hierarchical keyword or term assigned to a piece of information”. This meant WordPress had a hierarchical way of classifying information (categories), and a non hierarchical way of classifying information. As far back as in 2006, people were discussing »

Category: Technical SEO
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40 WordPress Optimisation tips

29 April 2009 by Joost de Valk » - 147 Comments

I presented on A4UExpo Europe yesterday on WordPress Optimisation, doing 40 tips in 40 minutes. Here are the slides:

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Optimizing WordPress database performance

30 March 2009 by Joost de Valk » - 71 Comments

I’ve been working with a plugin that was mentioned on the wp-hackers list last week, called debug queries, to optimize the performance on some of my sites, including this one. The plugin was pretty easy to use, and I’ve improved a bit on it. I’ve sent the patch to Frank, who authored the original plugin, »

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WP-cron not working?

19 February 2009 by Joost de Valk » - 23 Comments

So when I moved to the (DV) server at MediaTemple, it turns out that my WP-Cron stopped working. I didn’t notice for a while, until I found out that the new version of Tweetbacks didn’t work for me anymore, and this was using wp-cron. The fix turned out to be very simple, after some debugging »

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Fix Automatic Plugin Update

7 February 2009 by Joost de Valk » - 44 Comments

I recently moved from a MediaTemple Grid Server to a MediaTemple DV extreme, and in that move, I lost the ability to do automatic plugin updates, and it instead required me to enter my FTP info. As I use a gigantic amount of plugins, that becomes annoying very soon. So I decided to find out »

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WordPress SEO Video

27 January 2009 by Joost de Valk » - 83 Comments

Note: this video is rather old. While a lot of what I cover is still true, I have since released a WordPress SEO plugin and a Video SEO plugin that you might want to check out. I spoke at A4UExpo London last year and will be speaking at the upcoming A4UExpo Amsterdam. One of the »

Categories: Technical SEO, WordPress
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WordPress PHPXref – PHP Cross Reference

24 January 2009 by Joost de Valk » - 14 Comments

If you’re coding in PHP a lot, PHPXref is one of the coolest tools available. It allows you to browse large portions of source code, and find where functions, variables and constants are defined and referenced. As the PHPXref of WordPress I used to use isn’t available anymore, I decided a couple of weeks ago »

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