50 Extremely Useful PHP Tools

PHP is one of the most widely used open-source server-side scripting languages that exist today.

With over 20 million indexed domains using PHP, including major websites like Facebook, Digg and WordPress, there are good reasons why many Web developers prefer it to other server-side scripting languages, such as Python and Ruby.

Link:
http://www.smashingmagazine.com/2009/01/20/50-extremely-useful-php-tools/