Developing Plugins For WordPress

I spoke about Developing Plugins For WordPress on Wednesday, 18th June 2008 at the Singapore PHP User Group, June 2008 meetup.

This is the second time I am speaking at the user group. The first time was in December 2007 meetup where I spoke about the same topic WorPress Plugin Development With PHP.

I think this time my pace was slightly better.

By embedding this video, it breaks my site XHTML validation!

Powerpoint Slides and Source Code can be downloaded here.

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Error: Cannot redeclare

I got 3 reports regarding and error that says “Cannot redeclare function …”. 2 from here and 1 from here.

This is likely that you did not follow the upgrading instructions as stated in the readme.html (but I maybe wrong though).

When updating a plugin, please make sure you DEACTIVATE the plugin first before launching your FTP software to overwrite the files. BUT the best way is to delete that particular plugin folder altogether instead of overwriting it.

When updating WordPress, always DELETE everything EXCEPT your .htaccess, wp-config.php and wp-content folder. After that, then you upload the files in the zip that you have downloaded and run upgrade.php.

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14+ Awesome WordPress-Powered sites

Dougal has put up a list of 14+ awesome WordPress-powered sites on his site.

So being curious, I went to check those 14+ sites and see which sites are using my plugins.

After checking them out, 4 sites out of 14+ sites are using my plugins and they are:

» welovewp.com – WP-PostRatings
» delicious:days – WP-Polls
» PlayStation.Blog – WP-Email, WP-Polls
» Ford Motor Company’s Global Auto Shows – WP-PostRatings

Here are some sites posted in Dougal’s comments:

» WordPress Garden – WP-PostRatings
» Harry Potter Beyond – WP-Polls

Here are some sites posted in my comments:

» My Biggest Complaint – WP-PostRatings

To the webmasters of those sites, THANK YOU for your support.

PS: Maybe when I have the time I will have a links page that has links to all WordPress powered sites that are using my plugins. Just a thought =)

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