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SitePoint PHP Blog:
Symfony2 Console Getting Started with Console Helpers
April 09, 2015 @ 10:44:03

If you've ever worked with the Symfony Console component and wanted to enhance the experience with some additional functionality, check out the latest tutorial from the SitePoint PHP blog: Symfony2 Console: Getting Started with Console Helpers.

In this tutorial, I'll share my experiences and we'll give some extra love to the console helpers, which provide us with a large collection of handy functions. There are a lot of reasons to create console commands in your projects: sending emails, exporting/importing data, creating users, and so on. [...] By the end of this post, we want to be able to create a basic console command to generate some output - any output will do - only the way to getting there is important. Near the end, we'll discover some console helpers in order to create some nice interactions between users and the interface.

He starts by helping you get the component installed via Composer and creating the first simple command line script (a ConsoleApplication). He shows how to add in a basic "hello world" command (conveniently named "BasicCommand") and the result when executed. With this in place, he starts in on three helpers:

  • Question Helper
  • Table class
  • Progress Bar

Each includes the code needed to implement it and the resulting output. You can find out more about the component in the Symfony2 documentation.

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symfony2 console tutorial command helpers introduction question table progressbar

Link: http://www.sitepoint.com/symfony2-console-getting-started-console-helpers/

ServerGrove Blog:
New Symfony installer the fastest way to start your Symfony project
March 27, 2015 @ 12:13:42

The ServerGrove blog has a new post today introducing the new Symfony Installer, a tool that can make getting started with a Symfony2 application quick and easy.

Yesterday, the Symfony team introduced the new Symfony installer. Its main goal is to help developers to create Symfony projects faster. Until now, installing Symfony to start a new project required a few steps. [...] The installer tries to do this in one step. It downloads a compressed file with all the code, including the vendors directory, so you don't need anything else to run Symfony for the first time.

The post shows you how to install the installer via a curl call to fetch the executable. They show how to use it to create a new project, making a demo project and the resulting application and web interface for the demo. They also mention some of the future work that's planned for the installer including HTTPS support and caching improvements. The post finishes up with a quick mention of the code "under the hood" using the Symfony console component.

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symfony installer introduction demo tutorial example command console

Link: http://blog.servergrove.com/2015/03/27/new-symfony-installer-fastest-way-start-symfony-project/

NetTuts.com:
Design Patterns The Command Pattern
March 17, 2015 @ 12:42:22

NetTuts.com continues their series covering the basics of design patterns (in PHP) with a new article about the Command design pattern. This pattern is particularly useful for executing self-contained "commands" without other interaction.

In this article, we will be going through the command design pattern. As the name says, in this pattern we will be dealing with executing various commands. [...] Basically a pattern has numerous elements involved, which are as below. In the next section, we will be exploring each element with a code example. I will be taking the example of radio actions-very basic actions would be turning the radio on or off. So let's dive into each element.

Using the illustration of the radio, they go through the creation of the classes for the controls (on/off) and the two matching commands. The invoker is then told to execute the "turn off" command on the radio control object passed in. This sounds a little confusing but the code included in the article makes it clear how this implementation of the command is structured.

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designpattern tutorial series command pattern radio example

Link: http://code.tutsplus.com/tutorials/design-patterns-the-command-pattern--cms-22942

Programming Are Hard:
Structuring my applications, Cont'd
March 09, 2015 @ 12:03:16

The Programming Are Hard site continues its look at structuring Symfony-based applications in part two (it's just two parts) building on the structure and foundation laid out in part one.

It really irks me when I see some design/architecture decisions other developers have made but there's no technical explanation. What packages did they use? What challenges did they face? What trade-offs were made? I'll go over some more specifics in this post.

He recaps some of the things covered in the previous post first, ensuring everyone is on the same page. He then gets into the concept of "bundles" and how they encapsulate functionality. From there he talks about commands, controllers, dependency injection and lots of other topics, each with their own summary and a bit of code where needed for clarification.

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structuring application symfony bundle command controller di form provider repository resource serialize

Link: http://programmingarehard.com/2015/03/05/structing-my-application-contd.html

Mike Bronner:
Run #AllTheCommands Outside of Homestead
March 04, 2015 @ 10:02:49

In this new post Mike Bronner shows you how to get the latest PHP5 and Mcrypt versions installed on OS X Yosemite to make ti easier on developers needing to run commands outside of Homestead.

Laravel Homestead has brought virtual machines for web development to the mainstream PHP developer: it makes setting up a development stack similar to XAMP extremely simple. [...] However, one of the drawbacks so far has been that you always needed to run Laravel Artisan commands from within homestead, as they depending on MCrypt being installed. [...] The accepted solution thus far has been to install newer versions of PHP alongside Apple's version using Homebrew or MacPorts. [...] However, there's another method I came across while research some non-related issues: install the latest version of PHP from a binary that includes the MCrypt extension.

He walks you through the complete process (well, except for getting Homestead - that needs to already be there) complete with each command you'll need. You'll need to be familiar with the command line to make this all happen and know how to edit configuration files. If all goes well, the "artisan" command will work correctly and no errors will happen during the compile. He also includes a fix you'll need to put in to get the database configuration working from outside Homestead too.

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laravel homestead command artisan mcrypt install configure database

Link: https://medium.com/@genealabs/run-allthecommands-outside-of-homestead-e2fc8d05251f

Mathias Verraes:
Form, Command, and Model Validation
February 17, 2015 @ 12:34:38

In his new post Mathias Verraes talks about the separation of concerns that, in his opinion, should exist between form, command and model and the validation of each.

Many of the frameworks I've worked with, promise to separate responsibilities with MVC. In practice, the end up coupling everything to everything. The forms are coupled to the models, and there's a grand unified validation layer. This may be convenient at first, but it breaks down for larger systems, and creates headaches when having to support multiple clients. My approach is to clearly separate the validation for the form itself, from the Command validation and the model validation.

He talks about each of the different types in turn, starting with Commands. He suggests that the validation should happen in Value Objects in the Commands, validation rules in Models and some client-side validation (backed up by backend checking, of course) via Javascript or HTML5 fields.

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form command model validation separation concerns valueobject

Link: http://verraes.net/2015/02/form-command-model-validation/

Mathias Noback:
Collecting events and the event dispatching command bus
January 13, 2015 @ 11:52:33

Mathias Noback has posted the next part of his command bus in PHP series today with a few suggestions about event handling and when it's a good idea to dispatch them.

It was quite a ride so far. We have seen commands, command buses, events and event buses. We distilled some more knowledge about them while formulating answers to some interesting questions from readers.

In this new post, his focus is on collecting the events that happen as a part of the command's execution. He uses his "UserSignedUp" event his his previous example and a "send welcome email" handler to show why it may not be the best idea to execute all events simultaneously. Instead, he recommends making use of event collections (a feature his SimpleBus library supports) to define "providers" that can collect the events that need to happen and delegate the execution of them one after the other. Example code is included all through the post of events, providers and commands that make use of this idea.

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commandbus command collect event provider dispatch tutorial

Link: http://php-and-symfony.matthiasnoback.nl/2015/01/collecting-events-and-the-events-aware-command-bus/

Mathias Noback:
Responsibilities of the command bus
January 08, 2015 @ 09:53:43

Mathias Noback has posted another in his series looking at the concepts and implementation of command bus handling in PHP. In this new post he looks at some of the responsibilities of the bus and provides a few examples to help drive the point home.

In the previous post we looked at commands and how you can use them to separate technical aspects of the input, from the actual behavior of your application. Commands are simple objects, handed over to the command bus, which performs the change that is needed. [...] So the command bus contains some kind of a lookup mechanism to match commands with their handlers. Some command bus libraries use a naming convention here (e.g. handler name = command name + "Handler"), some use a kind of service locator, etc.

He starts off talking about the main point of the article, giving an overview of what he sees are the basic responsibilities of the command bus. He also sheds some light on methods he's seen for keeping it from becoming a "big inarticulate unmaintainable class". He then gets into his two examples: database transaction handling and protecting the original order of commands. He shows how his SimpleBus package handles most of this for you and shows how it follows the "chain of responsibility" design pattern to make it work.

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simplebus commandbus responsibility transaction order command

Link: http://php-and-symfony.matthiasnoback.nl/2015/01/responsibilities-of-the-command-bus/

Matthias Noback:
A wave of command buses
January 07, 2015 @ 10:01:18

In his latest post Matthias Noback looks at the recent interest in command bus handling in the PHP community. He introduces the concept for those not familiar with it and how it's handled in most of the command libraries.

Recently many people in the PHP community have been discussing a thing called the "command bus". The Laravel framework nowadays contains an implementation of a command bus and people have been talking about it in several vodcasts. [...] Since I consider this topic to be a very important and highly relevant one, I will spend several blog posts on it, explaining the concepts in my own terms, then introducing SimpleBus as a ready-made solution for your everyday PHP projects.

He starts with the definition of a command as something used "separate the technical aspects of user input from their meaning inside the application", a request from the client for the application to perform a task. He gives a simple example of a command (SignUp) and how it would be sent to the bus for handling. He lists some of the advantages of using commands like this, including the separation it allows between things like controllers and the actual functionality. He finishes up the post with a look at the actual command handler (with sample code) and the one-to-one relationship they have with the actual command.

Using commands you can separate the web-specific parts of your application from its essence. Commands define the use cases of your application and provide an internal API for anyone that might want to do something with your application.
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commandbus command introduction simplebus tutorial

Link: http://php-and-symfony.matthiasnoback.nl/2015/01/a-wave-of-command-buses/

Matthew Weier O'Phinney:
Deployment with Zend Server (Part 8 of 8)
September 18, 2014 @ 11:20:04

Matthew Weier O'Phinney has posted the last part of his "Deployment with Zend Server" series with part eight. This part focuses on some hints around the actual deployment and automation.

This is the final in a series of eight posts detailing tips on deploying to Zend Server. Zend Server SDK to deploy your Zend Server deployment packages (ZPKs) from the command line. Today, I'll detail how I automate deployment with zf-deploy and zs-client (the Zend Server SDK), and wrap up the series with some closing thoughts.

He quickly summarizes the previous parts of the series as individual steps and wonders if there's a better way than doing each of them manually. He shows exactly this with the automation handling that zf-deploy and zs-client offer combined with a make script defining steps for the deploy, ZPK update and a cleanup/Composer update task.

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deployment zendserver tip series part8 automation make command zfdeploy zsclient

Link: https://mwop.net/blog/2014-09-18-zend-server-deployment-part-8.html


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