Traditionally, application components have been designed to operate on and control the execution environment, an approach that delivers well to some extent. [...] Instead of making the module completely responsible for logging data to multiple endpoints, we can transfer the responsibility straight to the external environment. [...] Not surprisingly, the process of inverting these responsibilities between components and the environment is formally known as Inversion of Control (or in a more relaxed jargon, The Hollywood Principle), and its implementation can be a real boost when it comes to developing extensible, highly-decoupled program modules.

He uses a set of domain objects (Posts and Comments in a typical blog structure) and the Observer pattern to show how mixed up things might get if the application isn't carefully coded. He takes this and updates it to include a "comment notification service" that implements the SplObserver and is attached to the post to be executed on an event (in this case, the setting of a new comment).

Meteor Games, LLC is a start-up company based in West Hollywood, CA. Our management team has 10 years of experience in web-based media and entertainment, and has just completed a first round of investment. We offer a fun, creative, and rewarding environment with excellent compensation, regular reviews and a wide range of benefits including full medical coverage and 401(k). Starting salary will depend on experience.

Job Description:
Meteor Games is presently looking for a PHP Web Developer with complimentary front-end development experience to join our team in developing a large-scale game, community, and networking web site for our in-development MMORPG.

Required:

• PHP 5
• MySQL
• AJAX/JSON
• CSS
• XML

Recommended:

• Object-oriented programming
• Internationalization
• Template engine experience
• Tiered cache systems

Experience a plus:

• Prototype and JQuery
• Zend Framework
• Flex 2 / Actionscript 3

Please send a cover letter, your resume, and your salary history to jobs@meteorgames.com.

Please note, this is a full-time position in our West Hollywood, California location. You must either be able to travel to West Hollywood on a daily basis, or be prepared to relocate. You must be legally able to work in the USA.