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StarTutorial.com:
Understanding Design Patterns - Singleton
Apr 06, 2018 @ 11:28:50

The StarTutorial.com site has continued their introductory look at design patterns and using them in PHP with a new article covering the Singleton pattern.

[The Singleton pattern] ensures a class has only one instance, and provides a global point of access of it.

They use a more real-world example to illustrate the use of a singleton: organizing patients at a doctor's office using a ticketing system. In their example, the system makes use of a "TickerPrinter" object to represent the ticketing system. The issue is that the printer has to check every time to see if it needs more paper or if the ink is out in the first example. They refactor this to use a singleton, creating a getInstance method to return the same instance of a "TicketPrinter" object each time it's called rather than having to create a new one and manage it individually.

tagged: designpattern singleton introduction tutorial ticket printer

Link: https://www.startutorial.com/articles/view/understanding-design-patterns-singleton

Pehapkari.cz:
Domain-Driven Design, part 8 - Services and Factories
Mar 29, 2018 @ 10:09:28

The Pehapkari.cz blog has posted the latest article in their "Domain-Driven Design" series of posts covering the focus on the "domain" when developing an application rather than just features. In this latest tutorial, they cover services and factories to help with the encapsulation of functionality...and why they shouldn't be used.

This article is a reaction to readers’ confusion about services. We'll cover a domain service and domain factory in this article and when to use them and when not to.

Domain-driven design is about the domain. Domain services and domain factories do not exist in the domain. In general, we shouldn't use them. They are artificial constructions and this causes a lot of problems with code understanding, maintainability and also a divergence between the domain, the model, and the code.

The article continues the use of the e-commerce example when talking about the ideas of services and factories in the domain. It provides some basic examples (flow diagrams included) and the reasoning why they should not be used and what they could be replaced with.

tagged: domaindrivendesign domain service factory introduction avoid tutorial

Link: https://pehapkari.cz/blog/2018/03/28/domain-driven-design-services-factories/

Laravel News:
Getting Started with Signed Routes in Laravel
Mar 21, 2018 @ 09:58:26

On the Laravel News site there's a tutorial showing you how to use a feature that's been added in the latest release of the Laravel framework: signed routes. These signed routes allow you to create routes that work with signatures and help with their validation.

In the latest Laravel 5.6.12 Release a new signed URLs feature was introduced. In this article, we’ll work on enabling signed URLs in an application and look at a few options of how to use them.

The tutorial starts by helping you update your installation to the latest version and change the configuration to add the new ValidateSignature middleware to the route middleware list. They also provide an example of a route definition that contains several "id" type of values that could potentially be modified by an attacker. It then shows how to use the Url helper to generate a new signed route that includes a signature based on the URL contents. The tutorial also provides an example of temporary URL signatures that will include a timeout value as a part of the hash so it will expire after a certain amount of time.

tagged: signed route signature integrity laravel tutorial introduction

Link: https://laravel-news.com/signed-routes

TutsPlus.com:
Deploy PHP Web Applications Using Laravel Forge
Mar 20, 2018 @ 11:09:46

The TutsPlus.com site has posted a new tutorial showing you how to make use of the Laravel Forge service to deploy your PHP applications. Laravel Forge provides the configuration and automation tools to deploy your applications to servers on your own accounts (like DigitalOcean or AWS).

Developers love to automate things—for every process between development and production, they are keen to have a script that makes their workflow easier. This is also the case with deployment. The process of pushing the final build and deploying the app should be as easy as pressing a Deploy now button, but that is not what happens most of the time.

[...] Don't let the Laravel brand name mislead you. Apart from Laravel, you can use the service to host WordPress, Symphony, Statamic, or any other web project as long as it's PHP. Personally, I like Laravel Forge for its simplicity and ease of getting used to.

In this tutorial, I am going to take you through the steps to hook Laravel Forge with AWS and explore what it has to offer.

The tutorial starts with an overview of the service and what kind of setup and configuration the resulting servers have (by default). It then covers the various configuration options available and walks you through the process of setting it up with your AWS account. It also includes details about the server management system Forge provides, site management, SSH key addition and PHP/MySQL configuration. A few other helpful hints are also tossed in at the end covering task scheduling, daemons, monitoring and network/firewall configuration.

tagged: application deployment laravelforge laravel tutorial aws introduction

Link: https://code.tutsplus.com/tutorials/deploy-php-web-application-using-laravel-forge--cms-30329

StarTutorial.com:
Understanding Design Patterns - Abstract Factory
Mar 19, 2018 @ 13:42:01

The StarTutorial.com site has posted the next in their "Understanding Design Patterns" series of tutorials today. In this latest post they cover the Factory design pattern.

[The Factory design pattern provides] an interface for creating families of related or dependent objects without specifying their concrete classes.

They use the same fictional business as in the previous articles to put the pattern in a more "real world" situation. The goal is to create several "toy factories" that can build "toy" objects based on certain requirements: either cars or helicopters. The post starts with the creation of an abstract factory class and shows the concrete implementations of one for each type of toy. These concrete classes include basic properties about the toy and functionality to build out the basics (ex: a car has four wheels, a helicopter has rotors).

tagged: designpattern factory abstractfactory tutorial introduction toy

Link: https://www.startutorial.com/articles/view/understanding-design-patterns-abstract-factory

Laravel News:
Getting Started with Laravel Model Events
Mar 16, 2018 @ 09:47:09

The Laravel News site has a tutorial posted that introduces you to model events in Eloquent models and how to use them effectively in your code.

Laravel Model events allow you to tap into various points in a model’s lifecycle, and can even prevent a save or delete from happening. The Laravel model events documentation outlines how you can hook into these events with event classes, but this article aims to build upon and fill in a few additional details on setting up events and listeners.

The article starts with an overview of the different types of events available on the models and a brief summary of when each are fired. It then walks you through the process of registering events and where to configure the event-to-handler relationship. The artisan make:event command can then generate the skeleton code for you. In this class you can then add the handler method and then configure it in the providers. Finally it shows an example of how to test the event, stopping the save event and using observers to group the event handling.

tagged: laravel eloquent model event tutorial introduction

Link: https://laravel-news.com/laravel-model-events-getting-started

Matthew Setter:
First Experiences with Symfony 4 & the Symfony Community
Mar 12, 2018 @ 12:45:14

Matthew Setter has a new post to his site sharing some of his experiences and interactions with Symfony 4 and it's community as someone new to the framework and community.

Recently, I decided to learn the basics of the Symfony (4) framework, so that I could better understand one of my client's applications, and provide better support to it. I never expected to use such a well-rounded framework. Nor did I expect to encounter such an engaged and supportive community. Here's the story.

He starts off describing some of his reasoning behind looking into Symfony, including the fact that a project at his work makes use of the framework. He then talks about getting started with v4 of the framework by reading the documentation, creating a core application and overcoming some of the common first-timer issues. He covers the use of templates, routing with annotations and using the bin/console to handle code generation. The post ends with some of his experiences with the community and their interaction with a tweet of his showing his appreciation for the framework.

tagged: symfony symfony4 experience community project introduction

Link: https://www.matthewsetter.com/first-experience-with-symfony/

Andrew Embler:
A Concrete Guide to Dependency Injection
Mar 05, 2018 @ 13:54:48

In a new post to his site Andrew Embler provides a concrete guide to dependency injection, a look at some of the foundational principles behind dependency injection, some problems and how they could be resolved.

As we develop concrete5, we are very conscious about keeping the code base modern, so that we don't have to go through a massive, painful rewrite like we did with version 5.7. This means that we're frequently deep in the weeds, applying new concepts and functionality to new and old code alike.

[...] Here, we're going to talk about Dependency Injection. There are numerous tutorials, blog posts and Stack Overflow questions, regarding Dependency Injection – but there's always room for some more.

He starts with a look at the "old days" where dependencies were created inside of the class methods as needed and not shared. He then covers some of the problems with this approach and how a move to dependency injection (DI) can help. In his example a database object instance is created inside of the method each time it's' needed. The move to DI helps to resolve those issues by passing in the database instance instead. He finishes the post trying to clear up some of the terminology confusions around DI and briefly mentions containers (dependency injection containers) and the role they play.

tagged: dependency injection tutorial introduction guide

Link: http://andrewembler.com/2018/03/concrete-guide-dependency-injection

Christoph Rumpel:
Build a newsletter chatbot in PHP (Part 1 & 2)
Mar 02, 2018 @ 09:56:21

On his site has posted parts one and two of a series showing how to build a chatbot that can help provide more direct interaction with your users via a "newsletter" feature.

Since the beginning of the year, I am working on a new project of mine. It's a book called Build Chatbots with PHP. Follow the link to find out what it is about and who it is for.

More interesting to us is the newsletter, to which you can subscribe on the book's website. About once or twice a month I will send out an email with news on the development of the book.

He starts part one by outlining the general plan and functionality for the bot and its integration with Facebook. The tutorial then walks through the installation and configuration of the BotMan Studio project. It also shows the setup of the application on the Facebook service and how to connect it to the BotMan application. He walks through the setup of a few commands to welcome the user and start the conversation. Part two continues the process showing how to store the user and subscription information and how to send the newsletter notifications. He also makes some suggestions of extra functionality you might want to add like a typing indicator, a "fallback" for unknown commands.

tagged: introduction part2 part1 series tutorial chatbot newsletter facebook

Link: https://christoph-rumpel.com/2018/02/build-a-newsletter-chatbot-in-php-part-1

CloudWays Blog:
Getting Started With Vue.Js In Symfony
Feb 26, 2018 @ 12:57:04

On the CloudWays blog there's a tutorial posted that walks you through the beginning steps to create a Symfony + Vue.js application with a Symfony 4 application.

As a PHP developer who uses Symfony regularly, I have had a hard time choosing from the numerous JavaScript frontend frameworks available in the market. I had to pick one of the top-rated JavaScript frameworks including Angular, React, Vue and Aurelia.

[...] In this article, I will go through the process of enabling and configuring Vue.js within Symfony applications. Part of this process is covered in the official Symfony documentation.

The tutorial starts by answering the "Why Vue?" question and why frontends are important. He then gets into some of the prerequisites and the steps to create the application:

  • creating the Symfony 4 application via Composer
  • adding a default controller and route
  • making a default Vue.js template via Twig
  • pulling in Vue.js and its requirements via yarn
  • creating the Vue Component

The end result is a simple page that shows the component in a Bootstrap-themed page.

tagged: vuejs symfony tutorial introduction application template javascript

Link: https://www.cloudways.com/blog/symfony-vuejs-app/