Biweekly roundup: PHP goes mobile

This week I will be at PHP Goes Mobile, a single day event in Milan centered on mobile platforms and a BarCamp in the afternoon where everyone can propose a topic. In the morning there will be some interesting talks by Francesco Fullone, Enrico Zimuel and others. I'm thinking about proposing a BarCamp short talk on PHPUnit_Selenium.

Here are the original articles published this week on DZone.
Practical PHP Refactoring: Extract Superclass explains how to create a two-level hierarchy by extracting a superclass where to move duplicated code.
Python Hello World, for a web application is my first step into the Python world: how to respond to GET and POST requests from a Python script with Apache and mod_python.
Practical PHP Refactoring: Extract Interface is one of the most underrated techniques in the PHP world.
PHPUnit_Selenium is an howto explaining everything you can currently do with the Selenium 1/2 support in PHPUnit.
Practical PHP Refactoring: Collapse Hierarchy is about simplifying a design by collapsing classes in a hierarchy that are not really different.
Ajax requests to other domains with Cross-Origin Resource Sharing is one of the possibilities for using the XMLHttpRequest object to connect to external websites.
Practical PHP Refactoring: Form Template Method is about eliminating non-obvious duplication with the Template Method pattern.
Unit testing when Value Objects get in the way explains the usage of the Derived Value pattern to simplify a bit tests that involve Value Objects as a fixture, or as collaborators.