Ioc-Simple-Example

ComicBook.php

<?php

class ComicBook implements Readable
{
    public function read(NeedOne $n1, NeedTwo $n2, NeedThree $n3)
    {
        return $n3->seeWord(
            $n2->seeRaw(
                $n1->seePage($this)
            )
        );
    }
}

Eye.php

<?php

class Eye
{
    public function seePage()
    {
        return 1;
    }

    public function seeRaw($page)
    {
        $raws = [
            'Hello world',
            'Say good night',
        ];

        return data_get($raws, ($page - 1), '');
    }

    public function seeWord($raw)
    {
        return explode(' ', $raw);
    }
}

main.php

<?php

interface NeedOne {}
interface NeedTwo {}
interface NeedThree {}

$eye = new Eye;

MyContainer::bind(NeedOne::class, $eye);
MyContainer::bind(NeedTwo::class, $eye);
MyContainer::bind(NeedThree::class, $eye);

$people = new People();

$people->read(new ComicBook()); // output: ['Hello', 'world']

MyContainer.php

<?php

class MyContainer
{
    protected static $container;

    public static function bind($name, Callable $resolver)
    {
        static::$container[$name] = $resolver;
    }

    public static function make($name)
    {
        if (! isset(static::$container[$name])) {
            throw new Exception("Binding does not exist in containeer");
        }

        $resolver = static::$container[$name];

        return $resolver();
    }
}

People.php

<?php

class People
{
    public function read(Readable $readable)
    {
        $params = [];

        $receipeParameters = (new ReflectMethod($readable, 'read'))->getParameters();

        foreach ($receipeParameters as $parameter) {
            $params[] = MyContainer::make($parameter->getType());
        }

        return call_user_func_array(
            [
                $readable, 'read',
            ],
            $params
        );
    }
}

Readable.php

<?php

interface Readable{}