I have a namespaced application in PHP and Yii. I now have a need to implement "orderable.php" and would like to keep these interfaces all in one folder. I'm unsure what to call this folder. Any suggestions? In Java this seems much simpler ^_^
If you have namespaced application, sooner or later you will notice that interfaces also should have have their own namespace, so better follow PSR-0 and put it alongside classes in namespaced directory tree.