Nabil Muhammad Firdaus nmfzone

MySQL

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Laravel's Dependency Injection Container in Depth

Translations: Korean (by Yongwoo Lee)

Laravel has a powerful Inversion of Control (IoC) / Dependency Injection (DI) Container. Unfortunately the official documentation doesn't cover all of the available functionality, so I decided to experiment with it and document it for myself. The following is based on Laravel 5.4.26 - other versions may vary.

Introduction to Dependency Injection

I won't attempt to explain the principles behind DI / IoC here - if you're not familiar with them you might want to read What is Dependency Injection? by Fabien Potencier (creator of the Symfony framework).

	<?php

	namespace Spark\Utility;

	use Closure;
	use Illuminate\Support\Str;
	use Symfony\Component\DomCrawler\Crawler;
	use Symfony\Component\HttpFoundation\File\File;

	class ImageExtractor

	<?php

	namespace App\Providers;

	use Illuminate\Support\Arr;
	use Illuminate\Routing\Redirector;
	use Illuminate\Support\ServiceProvider;

	class AppServiceProvider extends ServiceProvider
	{

	class MyManagedResource extends ResourceController[String] {
	def index = Action(Ok("index"))

	def newScreen = Action(Ok("new"))

	def create = Action {
	Redirect(MyInjectableResource.reverseRoutes.index())
	}

	def show(id: String) = Action(Ok("Show " + id))

	# Reference: https://www.exclamationlabs.com/blog/continuous-deployment-to-npm-using-gitlab-ci/

	# GitLab uses docker in the background, so we need to specify the
	# image versions. This is useful because we're freely to use
	# multiple node versions to work with it. They come from the docker
	# repo.
	# Uses NodeJS V 9.4.0
	image: node:9.4.0

	# And to cache them as well.

	# regex to split $uri to $fastcgi_script_name and $fastcgi_path
	fastcgi_split_path_info ^(.+\.php)(/.+)$;

	# Check that the PHP script exists before passing it
	try_files $fastcgi_script_name =404;

	# Bypass the fact that try_files resets $fastcgi_path_info
	# see: http://trac.nginx.org/nginx/ticket/321
	set $path_info $fastcgi_path_info;
	fastcgi_param PATH_INFO $path_info;

	location ^~ /.well-known/acme-challenge/ {
	default_type "text/plain";
	root /var/www/letsencrypt;
	}

-# Stop all containers
-docker stop `docker ps -qa`
-# Remove all containers
-docker rm `docker ps -qa`
-# Remove all images
-docker rmi -f `docker images -qa `
-# Remove all volumes

	<?php

	// Require Laravel Illuminate\Support packages.
	//
	// composer require illuminate/support
	//

	$attendancesByDate = $attendances->groupBy(function ($attendance) {
	return $attendance->time->toDateString();
	});