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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).

ziadoz

<?php

Artisan::command('db:open {connection?}', function ($connection = null) {
    if (! file_exists('/Applications/TablePlus.app')) {
        $this->warn('This command uses TablePlus, are you sure it\'s installed?');
        $this->line("Install here: https://tableplus.com/\n");
    }

    $driver = $connection ?: config('database.default');
    $host = config("database.connections.{$driver}.host");

ziadoz

(function($) {
    $(document).ready(function() {
        // Highlight Navigation
        var url = $.parseUrl(document.location);
        $('a').each(function() {
            var link = $.parseUrl(this.href);
            if (link.pathname !== '' && link.pathname === url.pathname) {
                $(this).siblings().removeClass('active');
                $(this).addClass('active');
            }

ziadoz

<?php

// src/Foobar/Controller/FooController.php

namespace Foobar\Controller;

class FooController
{
    public function helloAction($request)
    {

ziadoz

<?php
// See: https://gist.github.com/1942528
trait Call_Dynamic_Methods 
{
	public function __call($name, $arguments) 
	{
		if (isset($this->{$name}) && $this->{$name} instanceof Closure) {
			$this->{$name} = $this->{$name}->bindTo($this, $this);
			return call_user_func_array($this->{$name}, $arguments);
		}

ziadoz

// See: http://ejohn.org/blog/learning-from-twitter/
(function($) {
  $(document).ready(function() {
    var resizeCallable = function() {
        switch (true)
        {
          case (window.innerWidth <= 768):
            // Do some exciting device size specific magic here.
            break;
        }