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SitePoint PHP Blog:
Basic TDD in Your New PHP Package
January 28, 2015 @ 12:27:17

The SitePoint PHP blog continues their "How to Build Your Own PHP Package" series with their latest post (part two of the series) covering the use of test-driven development while working on the package code.

In part 1, we set up our development environment, baked in some rules as inherited from The League, and created two sample but useless classes - Diffbot and DiffbotException. In this part, we'll get started with Test Driven Development.

He starts by briefly introducing PHPUnit, a PHP-based unit testing tool, and how to use it to generate the HTML version of the code coverage report. He helps you define a good phpunit.xml configuration file and how to execute a first sample test (code provided) from inside PHPStorm. From there he adds one some more complex testing of exception handling and checking the class types. With this foundation, he moves into the test-driven development (TDD) practices. TDD means writing the tests before writing the code to make those tests pass. He gives an example of this and shows how test abstract classes too. He then comes back around and writes the code to satisfy the test.

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Link: http://www.sitepoint.com/basic-tdd-new-php-package/

Matt Stauffer:
Laravel 5.0 - Generating Missing Events
January 28, 2015 @ 11:53:39

In the next part of his series introducing the upcoming version of the Laravel framework Matt Stauffer has posted part 16, about generating missing events.

Sometimes it can seem like a lot of work to create an event, create its handler, and bind the two. Create a command, create its handler, bind the two. I've often wished for a workflow that handled the whole process together in one. The artisan commands for generating commands and events are a good start--they both create their own entity and (optionally) its handler. But you still can spend an hour writing the command and handler, and then waste another 15 minutes trying to figure out why it's not working, only to realize you never actually bound the two together.

The solution to this in Laravel 5 is the "event:generate" handling with the artisan command line tool. He includes a look at the event handlers directories and files before executing the command and what changes post-execution, including the sample code generated for the event.

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Link: http://mattstauffer.co/blog/laravel-5.0-generating-missing-events

SitePoint PHP Blog:
Starting a New PHP Package The Right Way
January 27, 2015 @ 12:08:09

In part one of a new series on the SitePoint PHP blog Bruno Skvorc looks at the right way to start a PHP package using a set of guidelines that have evolved recently in well-structured, well-tested PHP packages.

In recent years, good standards for PHP package design have popped up, in no small part due to Composer, Packagist, The League and, most recently, The Checklist. Putting all these in a practical list we can follow here, but avoiding any tight coupling with The League (since our package won't be submitted there - it's specifically made for a third party API provider and as such very limited in context).

The list of rules includes topics like having a license selected, using PSR-4 autoloading and having in-depth code comments. Bruno uses these as a foundation and starts in on the creation of a package. He uses the PHP League skeleton structure to create the files and folders for a basic package. From there he updates the contents with details for his Diffbot example and installing other needed software libraries. The rest of the post is broken up into the two remaining steps and examples under each: sticking with the PSR-2 guidelines and planning for the structure of the package.

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Link: http://www.sitepoint.com/starting-new-php-package-right-way/

NetTuts.com:
Design Patterns The Simple Factory Pattern
January 27, 2015 @ 11:53:20

NetTuts.com has posted the next part of their series focusing on design patterns (and more specifically implementing them in PHP). In this latest post they look at a simple version of the Factory design pattern.

When you think of a factory, what comes to mind? For me, it's a place where things are created - that is, it's a centralized placed where things are produced. Later, the delivery of said products are done by the factory based on an order. Let's say that you're requesting a car. A factory will create one based on the specifications of the work order and will then deliver it once it's complete. Just as their real world counterparts, a software factory (that is, software that implements the factory design pattern), is an object that is responsible for creating and delivering other objects based on incoming parameters.

They mention the three different versions of the factory pattern but focus in on the simplest one (hence the "simple" in the title). They continue on with the car example, showing how to use a simple factory (a "carFactory") to build an instance of the "Car" class based on different classes of car types. The object is constructed when a "build" method is called with the type.

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Link: http://code.tutsplus.com/tutorials/design-patterns-the-simple-factory-pattern--cms-22345

Matt Stauffer:
Extending Laravel's Application
January 27, 2015 @ 10:48:37

Matt Stauffer has a new post to his site today showing you how to extend Laravel's Application class to enhance its handling with other handy features.

It's seldom that we need to extend Laravel's core, and even when we do, it's most likely we're going to extend specific components, which is detailed in the docs. However, all of these instructions presume you're using the core Laravel Application (IOC Container) to extend the other classes. What if you want to extend the Application itself?

The example he provides is from his own real-world experience, based around changes they wanted to make in the default folder paths for things like the "storage" or "public" directories. He shares the three simple steps to making this custom handling work:

  • Extend the class
  • Register it in your application's bootstrap
  • Override/extend the current methods to add in your own functionality

In this case, changing the default paths is something that's under discussion already, but it gives a good simple example of changing that default functionality.

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Link: http://mattstauffer.co/blog/extending-laravels-application

Coder on Code:
Design Patterns in PHP Adapters
January 26, 2015 @ 10:46:42

The Coder on Code site has posted a new tutorial covering the Adapter design pattern in detail. They talk about what the pattern is, what it can be useful for and include some code to illustrate.

The adapter pattern also referred as the wrapper pattern, I find that wrapper is a more fitting name since it describes clearly what this pattern does; it encapsulates the functionality of a class or object into a class with a common public interfaces. [...] Adapters are one of the easiest patterns to comprehend and at the same time one of the most useful ones.

He starts with some of the basic definitions of terms involved in the pattern: client, adapter and adapteee. His example centers around a notification manager class that lets you switch types between Twitter, Email and SMS messaging. His initial code has all of the message types handled in one class method. He shows how to refactor this out to an interface and a set of child classes, each with the corresponding handling in a "sendNotification" method. These are then used by an adapter in the main class to send the given message. This simplifies the main messenger class and contributes to the overall improvement of architecture and testability of the application.

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Link: http://coderoncode.com/2015/01/25/design-patterns-in-php-adapters.html

NetTuts.com:
Design Patterns The Decorator Pattern
January 23, 2015 @ 12:08:21

The NetTuts.com site has continued their series looking at design patterns and how they can be used in PHP. In this new post they focus in on the Decorator pattern, most commonly used to add functionality to a existing class (to "decorate" it).

Earlier in this series we explored both the facade and adapter design patterns in this series. Using facade, we can simplify large systems, and by implementing adapter we can stay safe while working with external API and classes. Now we are going to cover the decorator design pattern, which also falls under the category of structural patterns. We can use the decorator pattern when we just want to give some added responsibility to our base class. This design pattern is a great alternative to a sub‑classing feature for extending functionality with some added advantages.

They start with a problem that needs solving - sending an email with additional content not defined in the parent class. They show how to do something similar with child classes, but quickly find a limitation. Instead, they show how to use decorator classes and a simple interface to provide interchangeable classes that augment the contents of the email body as passed in via constructor injection.

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Link: http://code.tutsplus.com/tutorials/design-patterns-the-decorator-pattern--cms-22641

Hari KT:
Conduit The Middleware for PHP
January 22, 2015 @ 10:22:16

In his latest post Hari KT looks at Conduit, a middleware system that lets you build PHP applications out of various pieces (the middleware) according to the PSR-7 specification (for HTTP messaging).

Long back, I happened to talk with Beau Simensen about stackphp on #auraphp channel. It was hard for me to digest when I noticed it need symfony/http-kernel and its dependencies. After a few months, I started to like the middleware approach of slim framework and wanted to push it to aura. But nothing happened there. Conduit is a Middleware for PHP built by Matthew Weier O'Phinney lead of Zend framework. Conduit supports the current PSR-7 proposal. I believe like the many PSR's, PSR-7 will be a revolution in the PHP world. Conduit is really a micro framework and can grow with your project.

Hari walks you through getting the tool installed and includes an example route that just echoes "Hello conduit!"back to the user. With that in place, he shows how to add in some middlewares, chosing the Aura router and dispatcher for more complex route handling, and integrating them into a simple controller/action microframework structure.

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Link: http://harikt.com/blog/2015/01/21/conduit-middleware-for-php/

NetTuts.com:
Create a Custom Payment Method in OpenCart Part 3
January 21, 2015 @ 10:20:44

NetTuts.com has continued their series showing how to integrate a custom payment method into your OpenCart instance with part three of the series. In this tutorial they focus more on the frontend aspects, creating controller and model handling for the new method.

If you've been following along with this series, you should be familiar with the kind of file structure we set up for our custom payment method in the back-end. [...] We'll use a similar kind of file setup for the front-end section as well.

He starts with the controller, building a handler for the Custom method, doing some data filtering and getting the order information. He walks you through what each of the lines are doing and shows how to output the result back to a view. He also includes the model code needed for the custom payment method as well as language/template files to display the form needed to gather the necessary data.

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opencart part3 series custom payment method tutorial

Link: http://code.tutsplus.com/tutorials/create-a-custom-payment-method-in-opencart-part-3--cms-22464

SitePoint PHP Blog:
How to Encrypt Large Messages with Asymmetric Keys and phpseclib
January 20, 2015 @ 11:40:51

On the SitePoint PHP blog today David Brumbaugh shows you how to encrypt large messages with phpseclib and asymmetric keys. phpseclib is a PHP library specifically designed to handle encryption and decryption in an easy-to-use way.

Most of us understand the need to encrypt sensitive data before transmitting it. Encryption is the process of translating plaintext (i.e. normal data) into ciphertext (i.e. secret data). During encryption, plaintext information is translated to ciphertext using a key and an algorithm. To read the data, the ciphertext must be decrypted (i.e. translated back to plaintext) using a key and an algorithm. [...] A core problem to be solved with any encryption algorithm is key distribution. How do you transmit keys to those who need them in order to establish secure communication? The solution to the problem depends on the nature of the keys and algorithms.

He talks some about the difference between symmetric and asymmetric algorithms and some advice about the selection of the right one (or ones) to use in your app. He also talks briefly about the problem with RSA keys, mostly that it has limits on the amount of text it can encrypt. His solution is to "encrypt the message with a symmetric key, then asymmetrically encrypt the key and attach it to the message". He explains the encryption/decryption process step by step and starts in showing the code to make phpseclib do the work. He shows how to generate the keys, build the encrypt function and the decrypt function with about 30 lines of code each.

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encrypt decrypt large message asymetric key phpseclib tutorial

Link: http://www.sitepoint.com/encrypt-large-messages-asymmetric-keys-phpseclib/


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