Static what?
Lorna Jane explains about Static Method in PHP…
http://www.lornajane.net/posts/2010/Declaring-Static-Methods-in-PHP
Looks like above link isn’t up anymore or having issues.
Additional links:
http://www.brainbell.com/tutorials/php/Static_Methods.html
http://phpduck.com/php-static-methods-and-properties/