The TutsPlus.com site has posted another tutorial where they go in-depth with one of the components of the Symfony framework. In this new tutorial they cover the Symfony Event Dispatcher component including its basic use via events and subscribers.

Today, we're going to learn how to use the Symfony event dispatcher component, which allows you to create events and listeners in your PHP applications. Thus, different components of your application can talk to each other with loosely coupled code.

[...] The event dispatcher component provides three elements that you could build your app architecture around: event, listener, and dispatcher. The whole system is orchestrated by the dispatcher class, which raises events at appropriate points in an application and calls listeners associated with those events.

The tutorial starts with the command you'll need to get the dispatcher installed and examples of:

• creating events
• dispatching the events to subscribers
• listening for the events

The tutorial then covers subscribers, reusable listeners that can be added to the list for handling when an event fires. Code examples are included for all topics.

Over the past several weeks the Symfony project blog has released a series of posts detailing new features in the 4.2 release of the framework. Here's the current listing of those posts:

• Simpler functional tests
• DivisibleBy constraint
• Autowiring by type and name
• PDO-based lock storage
• Console tables improvements
• SameSite cookie configuration
• VarExporter component

Each post includes a summary of the changes or additions and some example code and configuration showing it in use.

In a new post to his site Freek Van der Herten announces the release of their latest package to help with the integration of the BladeX functionality into your Laravel views - using them with view models.

Earlier today we released BladeX, a package that allows you to use Blade components using a Vue inspired syntax.

[...] In the latest North Meets South podcast Jacob and Michael discussed BladeX and wondered if the package could be married with view models or Laravel's View Composers. Our team discussed this too last Friday but we decided to release the core features of BladeX first. After the release today it became apparent pretty fast that we needed some sort of view model support in our projects too. So we got to work!

He then walks you through how to integrate the two pieces of functionality to render a select element containing a country list. He includes the backend code to make the connection between BladeX and the model as well as the view model and template code. He finishes the post with an example of what the result should look like, containing the three countries from his list.

Freek Van der Herten has a post for the Laravel users out there showing how to use custom HTML components in your Blade views making use of this package.

Today we launched our newest package called BladeX. In short this package provides you with an easy html like way to render custom html components in your Blade views. In this blogpost I'd like to introduce the package to you.

He starts by describing an example application where reusable components could be helpful (things like alert messages, form components and layout parts). He then shows how to create a component for an alert message that can be used via the @component functionality in Blade as a sort of "include and use" call. He shows how to pass in variables, use slots, and prefix components. He wraps up the post going "under the hood" and showing how it works via a service provider and how they made the package (and why).

On the TutsPlus.com site today they've posted a new tutorial spotlighting one of the components that makes up the Symfony framework, the Symfony Cache Component - and how you can use it to improve the performance of your applications.

Today, I'll show you the Symfony Cache component, an easy way to add caching to your PHP applications. This helps improve the overall performance of your application by reducing the page load time.

[...] In this article, we'll explore how you can unleash the power of the Symfony Cache component. As usual, we'll start with installation and configuration, and then we'll go on to explore a few real-world examples in the latter half of the article.

The tutorial starts with a few basic terms you'll need to be familiar with to use the component. From there it's straight into the installation and configuration of the component. Code is then included showing a more "real world" example of caching several different kinds of data, fetching it and setting expiration times. It then walks through each line of the code explaining how it works and more context about what's happening behind the scenes.

In a new post to his site Colin O'Dell has shared a Composer "metapackage" that can help you avoid unsupported Symfony component versions with the help of Composer's own internal version checking system.

Using symfony/symfony makes Composer install all Symfony Components in the same version. But when using the standalone packages, Composer might install dependencies in a different major version - for example, symfony/validator v2.8 is compatible with symfony/translation v3.0.

This is fine if you don't want to stick strictly to Symfony LTS versions, but it does mean that you could end up using versions of components which no longer receive security updates.

Rather than having to specifically define (and manage) the versions of package you want to install, you could opt to install his package that will do the hard work for you. It uses the "conflict" handling in the Composer configuration to limit version numbers on many of the popular Symfony packages and requires them to be greater than or equal to certain versions.

The TutsPlus.com site has posted another tutorial spotlighting a component of the Symfony framework. In this latest tutorial they cover the Symfony Filesystem component, a module that provides useful wrapper functionality for common file system-related needs.

In this article, we're going to explore the Symfony Filesystem component, which provides useful methods to interact with a file system. After installation and configuration, we'll create a few real-world examples of how to use it.

The tutorial starts with a brief introduction of the component including a listing of functionality it provides. It then moves on to the installation (via Composer) and use in some sample code. From there they show how to use it to:

• create a new directory
• create a new file and add contents
• copy a directory
• remove a directory

Each of these includes both a code example and a brief summary of what's happening.

On the TutsPlus.com site they've posted a new tutorial showing you how to use the Symfony Security component to authenticate users in your system and use role-based access checks.

In this article, you'll learn how to set up user authentication in PHP using the Symfony Security component. As well as authentication, I'll show you how to use its role-based authorization, which you can extend according to your needs.

The tutorial starts with a summary of the Symfony Security component and what subcomponents it includes. It then walks you through the installation of the component via Composer (of version 4.1). They then walk through a more real-world example that uses user credentials and role information pulled from a MySQL database. They provide the code for the User class, a DatabaseProvider class, a DatabaseAuthenticationProvider, and how they all work together. Code is provided to complete the authentication process and to create the database table for the user credential and role details.

On the TutsPlus.com site today they've posted a tutorial sharing some examples of dependency injection using the Symfony DependencyInjection component.

In this article, we'll look at some examples of using the Symfony DependencyInjection component. You'll learn the basics of dependency injection, which allows cleaner and more modular code, and you'll see how to use it in your PHP application with the Symfony component.

The tutorial starts by introducing the component and what kind of functionality it includes to help register and fetch services on demand. It then walks through the installation (via Composer) and the installation of other optional related packages. It then dives into the code, showing how to put the package to use to register a new service and pull it back out to use. The article then moves on and shows a more "real world" example with services that have dependencies and configuring it in a YAML configuration file.

Tomas Votruba has continued his series covering the use of the Symfony Console component with a new tutorial. In this latest article he shows how to get "stylish and standard console output" using the output formatting included with the package.

Even if you don't use any component from Symfony or even installed one, you can use this trick in your PHP CLI App.

It's simple, provides standard and makes your output look like a design from Apple - useful and nice at the same time.

He starts by introducing the OutputInterface that the Symfony Console package includes and shows a few screenshots of the difference between normal console output and the Console component's look. He also covers the SymfonyStyle functionality that allows for even more fine-grained control over the input and output handling of your application. He finishes the post showing a few tips on integrating these styles into your command line application and setting it up to fetch SymfonyStyle as a service.