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The Iterator, Countable and ArrayAccess SPL Interfaces

In this first part of a short series, I'm going to introduce you to using the Iterator, Countable and ArrayAccess interfaces that come with the Standard PHP Library. You'll see how to implement some of the methods declared by the Iterator interface within a class that manipulates MySQL result sets via an intuitive API.
- For many PHP developers eager to apply the object-oriented paradigm in a more thorough and consistent manner, the release of PHP 5 brought a number of handy features that allowed them to achieve this goal in a truly painless fashion. This isnt breaking news, of course, but the inclusion of member ...
Thu, 11 Mar 2010 09:00:10 -0500 ~ Read more

Implementing the Data Mapper Design Pattern in PHP 5

In this first part of a five-part series, I introduce you to implementing the Data Mapper design pattern in PHP 5. This pattern attempts to solve the issue of the strong coupling that often exists between the domain objects present in an application and the underlying persistence mechanism. This benefit comes at a cost, since data mappers add a new layer of complexity. Living with this minor trade-off is quite worthwhile, though, as you'll see.
- Since the web is in constant evolution and merges a variety of technologies and languages, developing web applications (specially mid-sized and large-scale ones) has become a challenging process. Indeed, applications require extensive planning, modeling and testing, before reaching a stable depl...
Wed, 10 Mar 2010 09:00:09 -0500 ~ Read more

Defining an Abstract Class with Restrictive Constructors in PHP 5

In this second part of a four-part series, I rebuild the example application developed in the previous tutorial. As you'll recall, it used a protected constructor to prevent the instantiation of the base array iterator class. In this case, a better result will be achieved by declaring the iterator abstract; still, the example demonstrates a simple utilization of a restrictive constructor in a concrete situation.
- Unquestionably, the introduction of a more robust object model in PHP 5 has provided developers with additional features that allow them to build efficient and thorough object-oriented applications without the need to appeal to the ugly programming hacks used frequently in the bad old days of PHP ...
Tue, 09 Mar 2010 09:00:09 -0500 ~ Read more

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