Old articles on web development

My (still) surprisingly popular article explaining an SQL data structure:

• Storing Hierarchical Data in a Database for SitePoint.com

I wrote several articles for evolt.org, a web development community:

• Automated creation of thumbnails with PHP for evolt.org
• Incoming Mail and PHP for evolt.org
• PHP frontend for ImageMagick for evolt.org
• Storage and re-use of images using PHP/GD - Part 1 for evolt.org
• Storage and re-use of images using PHP/GD - Part 2 for evolt.org
• Using PEAR’s mimeDecode module for evolt.org

I published one Dutch article on PHPen.nl (now offline):

• Cache-vriendelijke pagina’s in PHP for PHPen.nl (Dutch)

And a few notes I have only shown on my own site:

• Array to XML function for PHP
• Een reactiesysteem met PHP en MySQL
• A simple XML publishing system