Jeremy Cook is back with the next part of his series looking at the handy features PHP's SPL provides. In this new post he looks at the ArrayAccess interface and how it can make your data more accessible to PHP's own array handing functions.

ArrayAccess allows you to treat an object that implements it as if it is an array for the purposes of setting, unsetting and retrieving data from it. Please note the emphasis in the last sentence! ArrayAccess does not make an object behave like an array in any other way. If you pass an object that implements ArrayAccess to a PHP array function such as in_array() you'll still get an error. This will become a little clearer with some of the examples below.

He shows what you'll need to use this interface in your class - implementing the interface and defining a set of four methods to get/set and check for the value in your array. He includes a practical example of pulling data back from an API and wrapping it in a class to make accessing it simpler (also implementing the Countable interface as well, see the previous post for more on that). Code is include to illustrate how it can be used.

On the Leaseweb Labs blog there's a recent post looking at using the POC framework to work with flexible output caching. The tool makes it easy to create a new object and push cache content into it, automatically caching the data to sources like the file system, a Redis instance or a MongoDB database.

Last year at the Symfony conference in Paris I have heard a really good quote: "There are only two hard things in Computer Science: cache invalidation and naming things" - Phil Karlton. I agree with it and it gave me a boost to keep evolving the concept.

He includes an introduction to the caching features of the framework complete with sample code showing first how to cache to the default file system and a more complex example that uses unique caches and page blacklists. Other features planned for the caching tool include edge-side includes, using Twig for templating and statistics recorded to a database.

On the LearnComputer.com site there's a new post comparing the benefits/downfalls of online versus classroom learning of PHP development. They list a few advantages and disadvantages of each.

There can be many factors in the decision to learn PHP online or to take a class in-person, and for some, this can be a difficult decision to make. This article discusses the pros and cons of each method of PHP training to help you find the learning method that is going to suit your needs best. PHP isn't a new programming language, and there is a wealth of information on it on the web for every level of proficiency. The question is whether these resources alone are sufficient to get you up-and-running with PHP quickly.

For the "online" section advantages include flexible schedules and more up to date content. The disadvantages are things like a prerequisite knowledge of using computers/the training software and that the instructor might only have "set hours" to answer questions and offer help. The "classroom" option advantages include the motivation of a regular meeting time and fewer technology hurdles to overcome. Disadvantages include the need for a time/in-person commitment and that the focus might be higher level than needed to appeal to a more mass audience.

On the AndroidHive site there's a recent tutorial (plus screencast) about combining PHP, MySQL and SQLite to act as the backend authorization for your Android application.

In my previous article Android Login and Registration Screen Design i explained designing the login and registration interfaces, but it has no functionality. In this tutorial i am explaining how to build complete login and registration system in android using PHP, MySQL and SQLite. Also this tutorial covers how to build simple API using PHP and MySQL.

The tutorial walks you through each step of the process:

• Creating MySQL Database and Tables
• Building PHP API Classes
• Starting Android Project
• Making the JSON Parser, SQLite Database Handler and User Functions Classes
• Designing the Screens
• Switching between Activities
• Finally Updating AndroidManifest.xml

If you want to get started quickly, you can just download the final result and go.

On the Script-Tutorials.com site today there's a new tutorial about form validation using a combination of jQuery on the frontend and PHP on the backend.

In this tutorial, I will show you how to create an attractive, pleasant to look form for your website and then I will explain you how to dynamically validate them using Javascript. We'll also cover server-side validation with PHP to make everything 100% safe. This tutorial will help you to add more functionality to your forms which leads to better user experience and better quality of your website.

His sample form (name, password, email and gender) is made from some pretty simple HTML markup. The real trick comes with the jQuery validation on each field handled in an onKeyUp. Included are both a "password strength" method and an email validation method to check the format of the address. Errored fields have their background color changed to indicate that they've failed and some basic validation (length, password match, etc.) are also included. The PHP does much of the same validation once the form is posted and returns any error messages that might have come up.

You can download the code or try out a live demo to see the scripts together in action.

In PHPMaster.com's latest tutorial Lukas White introduces you to using the Yahoo "Placemaker" web service to geographically locate a place from a free-form text string. The results include "place details" like the type of the location, latitude, longitude and how confident they are in their match.

The challenge then is to do two things: work out what place you could be talking about, disambiguate if necessary, and then identify exactly where on Earth that is. That's what I'll show you how to do in this article; by using a freely available web service, we'll write a simple program to ask users where they are (and ask them to clarify if necessary) before identifying their responses in concrete terms.

He shows how to make a request to the Placemaker web service, passing it a string coming from the user, to be located. The POST request contains a few pieces of data including an application ID , your desired output type and the language you're using for the input. His example code uses curl to make the request and handles it (the XML response at least) with a call to simplexml_load_string.

Here's what was popular in the PHP community one year ago today:

• Chris Hartjes' Blog: Book Review: PHP 5 Social Networking
• Rob Allen's Blog: Zend Framework 2 in Action
• Mike van Riel's Blog: Introducing: DocBlox
• SocialDevelopers.net: Facebook and the Zend Framework - Part 1: Iframe Authentication
• Binpress.com: Web Developer Programming Contest
• Matthew Weier O'Phinney's Blog: Why PHP Namespaces Matter
• Michael Feichtinger's Blog: PHP5 WebSocket Example - A Simple Chat
• Greepit.com: Behavior Driven Development Framework for PHP: Behat
• CodeIgniter.com: CodeIgniter 2.0.0 Released
• Steve Francia's Blog: On Symfony2
• Joshua Thijssen's Blog: Password hashing and salting
• Volker Dusch's Blog: Setting up Jenkins for PHP Projects
• InfoWorld: InfoWorld review: Fabulous PHP frameworks
• Strattonbrazil's Blog: php to python: Why PHP is now dead to me
• Gonzalo Ayuso's Blog: Function decorators in PHP with PHPDoc and Annotations

The Server-Side Magazine site has posted an interview (10 questions) with Andrei Alexandrescu, a research engineer currently working at Facebook.

Today we caught up with Andrei Alexandrescu for a "10 Question" interview. He is a Romanian born research engineer at Facebook living in the US, you can contact him on his website erdani.com or @incomputable. We will talk about some of the juicy stuff that going on at Facebook, so let's get started.

Their questions include:

• What's your development setup?
• What do you think of PHP as a language from your perspective, regarding that Facebook was initially written in PHP then transformed to C++ using HipHop for PHP. What are the pros and cons of using C++ over PHP at Facebook?
• Currently, what kind of research do you conduct at Facebook? (or is this confidential?)
• Tell us a little bit about the D programming language, in contrast to C, PHP, Ruby and others. In what fields can someone apply D?
• Also, what kind of advice can you give for developers who are considering to apply to Facebook? What kind of skills is Facebook looking for in a potential candidate. Is it really important to be a graduate CS? What kind of skills do the majority of Facebook employees possess?

Read the full interview for his answers to these and other interesting questions.

Rafael Dohms has a new post to his blog about some of the lessons he learned attending this year's PHP Benelux conference both from the perspective of attending the conference and having been at several conferences around the world.

After hearing about how great PHP Benelux Conferences were I finally made it over to Belgium to check it out, and i was impressed. To catch you up on the new, I moved to Amsterdam last december and thus had the chance of attending the conference which is now 2 hours away on a train ride. I could not expect less of a wonderful conference when names like Michelangelo van Dam are involved and this was no exception.

Among his suggestions, there's things like:

• Value your sponsors
• Value your attendees
• Make your attendees pay
• Value the organizers and your volunteers

...and one of the most important ones: "Have Fun!" If you're not following this piece of advice, you're probably doing it wrong.

php|architect, the group behind the yearly php|tek conference has posted this year's official schedule. Sessions in this year's event include:

• Developer Testing 201, When to Mock and When to Integrate (Laura Beth Denker)
• API Development (Rob Richards)
• The MicroPHP Manifesto (Ed Finkler)
• Web Security and You (Elliot White)
• Decoupled Library Packages for PHP 5.4
• Clojure for PHP Developers (Ian Barber)

Tickets are now on sale - you can find out more on the sales page for the event.

The PHPClasses.org site has posted the latest episode of their "Lately in PHP" podcast - episode 20: "MicroPHP vs Complicated PHP".

Earlier in January Ed Finkler announced the MicroPHP manifesto. It seems to be a rant about against the practices of developers that make PHP development more complicated than it should be. This is one of the main topics discussed by Manuel Lemos and Ernani Joppert in the episode 20 of the Lately in PHP podcast. They also discuss the final release of PHP 5.4.0 and whether you should upgrade it or not, the repercussion of the PHP Hash Collision Vulnerability, as well the trends of PHP world based on the analysis of the PHP Zeitgeist 2011 initiative.

You can listen to this latest episode either by using the in-page player or by downloading the mp3.

Sebastian Bergmann has shared a presentation he originally gave at an Etsy event covering some of the history behind the popular PHPUnit tool and the development it's been through.

When Noah Sussman asked me to give a Code as Craft Technology Talk last week when I was consulting for Etsy I immediately said yes. [...] Just like with a talk that I gave last year, I suddenly had a chain of associations in my head that I just had to follow. And down the rabbit hole I went once more ...

He talks about the origins of PHPUnit (and mentions a few other tools), the move from PHP4 to PHP5, a change in version control from SVN to Git and features of the tool including mock objects and data providers. He also notes that not all tests are "good tests" and how, sometimes, backwards compatibility breaks are a good thing.

Lorna Mitchell is back with another post in her "Building a RESTful PHP Server" series today with this new post showing how to work with output handlers (her focus is on JSON).

So far we've covered parsing requests to determine exactly what the user is asking for, and also looked at routing to a controller to obtain the data or perform the action required. This post gives examples of how to return the data to the client in a good way.

She advocates using output handlers instead of the usual views you'd think of in a typical MVCish sort of application. The difference here is that there's not a lot of extra overhead to produce the results - it's literally an output directly from a class extending the base view (including the correct headers). She also briefly mentions the inclusion of JSONP functionality, allowing you to specify a local callback to execute when the request is returned. A few other "nice to haves" are also mentioned like the number of results returned and pagination support.

Alessandro Nadalin has a new post to his blog looking at the Composer project and using it to manage packages and dependencies in PHP applications.

Managing dependencies between pieces of software, in PHP, hasn't always been a relief: we had PEAR and PECL with their workflows and problems while, in other ecosystems, the solution to this problem has been solved in better ways, like NodeJS's NPM.

He takes a first look at the tool, describing how to get it set up, create a sample configuration (describing each section inside it) and an example of the tool's output. He also briefly touches on the Packagist website/repository and links to the instructions on how to create your own.

In this latest post to his blog Justin Carmony looks at a system he created to hook his Nagios notifications into the Twilio web service and have it notify him via SMS with something was wrong.

In the past I would just use my iPhone's email-to-txt email address. However, when I received the txt message, it wasn't formated very pretty, and it would have a different "From Number." So if we had a crazy day, I would have 20-30 message threads in my iPhone all about Nagios. [...] What I like out this setup is with Twilio, I can buy a phone number for $1 a month. So all my notifications come through the same number.

He's included the PHP code he uses to send the notifications (using the Twillo library) and the Nagios commands he configured to send the notifications to that script via the command line.

On PHPMaster.com today Steven O'Brien takes a look at a popular PHP-based framework, Yii - specifically one of the components that makes it up, the CComponent that provides a base for all other components in the framework.

There's been a lot of buzz surrounding the use of frameworks for quite a while now and there are many great PHP frameworks to choose from. I was blown away by the simplicity and power of the base CComponent class in the Yii framework. [...] Every class in the framework extends from the CComponent class, which means that all subclasses work as components and can raise and handle events as well as be reusable and configurable. This packs a lot of punch for such a little class!

In this first post of the series, he looks at how this base class lets you work with class properties using the magic getters and setters. He includes some code showing how to set them up and how to use it to configure your object by passing in other component and their configuration.

Over on the PHPClasses.org blog today there's a new post looking at the next major upcoming PHP version (5.4), what it comes with and why you might want to make the upgrade.

PHP 5.4.0 is planned to be released on February, 2 2012. By the time you are reading this, it may already been out. It is a result of many months of development. Many features were proposed for this release. Some made into this version, others did not make it at least for now. So, now you may be wondering which interesting features really made it. Let me tell you more about some of the more interesting features present in this release.

The article mentions some of the usual major features that can be found in just about every "in PHP 5.4" list - traits, the built-in web server, binary notation for integers - but it also includes some of the features that didn't make the cut this time (like annotations and the inclusion of the APC caching extension). Also included are questions to ask to see if the upgrade is for you like:

• Do you need the new features?
• Do you need the updates now?
• Try it and test it in dev first - does it meet your needs or cause other bugs?

The planned release for PHP 5.4 is during the first week of February (2012). Additionally, if you'd like to give the PHP development group some help testing out the latest Release Candidate, you can find instructions here.

In response to some of the comments made on his previous post about why you should use dependency injection in your applications, Charles Sprayberry is back with some more concrete examples showing how it all works with some code to back it up.

To help better explain each of the three aspects of DI I discussed in the previous article I'll be going over each more thoroughly and with those code examples requested. I'll be going through each point one at a time as the explanations will likely be of some length compared to the original post.

He starts with the "villain" of the story - the Singleton design pattern, a difficult to test method that lulls you into thinking you're not in the global scope. He talks about the problem of using this approach and how the Factory design pattern can be used to create an alternative. He changes up the example to create a "DbTableFactory" class that can be used to create the objects needed - in this case a "UserTable" object with the connection injected into it at construct time.

In a recent post Marcelo Gornstein takes a look at using dependency injection with Doctrine2 using his Ding container.

This article will show how we can develop software in php with a nifty design and architecture, and very much like other languages like java, using an ORM and an AOP, DI, Events container. I will assume you've read (or at least took a quick look) at this article that explains the tree layout used throughout the code, and that you have some basic knowledge of Doctrine2 and used it before on your own.

He starts with the result - an easy to use, self-contained (and decoupled) system for accessing the Doctrine2 instance. It's event-driven and uses Aspect-oriented programming to mange interactions between components (or as he calls them "beans"). Code is included for the entire process for a logger, the User entity, entity manager, user repository and transactional aspect. You can find the complete source for his example on his github account.

Latest PECL Releases:

• xdebug 2.1.3
• mysqlnd_ms 1.2.1