php - where to find "template" interfaces?

Question

i wonder where one can find template interfaces.

eg. i am creating these classes that implements iLog:

 DatabaseLog
 ScreenLog
 FileLog

i wonder what methods should a typical Log class have?

is there a set of interfaces you could just implement/learn from rather than reinvent the wheel and have to think about the method names.

eg. Interfaces:

 iLog
 iDatabase
 iErrorMessage
 etc.

Thanks

Answer 1

PHP defines the following interfaces (should, but may not be complete):

• Traversable — The Traversable interface
• Iterator — The Iterator interface
• IteratorAggregate — The IteratorAggregate interface
• ArrayAccess — The ArrayAccess interface
• Serializable — The Serializable interface
• Countable — The Countable interface
• OuterIterator — The OuterIterator interface
• RecursiveIterator — The RecursiveIterator interface
• SeekableIterator — The SeekableIterator interface
• SplObserver — The SplObserver interface
• SplSubject — The SplSubject interface

See

• http://de.php.net/manual/en/reserved.interfaces.php
• http://de.php.net/manual/en/spl.interfaces.php
• http://de.php.net/manual/en/spl.misc.php

As for your Logger Interface, I'd say it should have a method log($message, level) and nothing else.