IoC implementation

ioc.php

<?php

class B
{
    public $name = 'akram';
}

class A
{
    private $b;

    public function getB()
    {
        return $this->b;
    }

    function __construct(B $b)
    {
        $this->b = $b;
    }
}

class Container
{
    public static function make($className)
    {
        $reflection = new ReflectionClass($className);
        $constructor = $reflection->getConstructor();
        if ($constructor && count($constructor->getParameters())) {
            $args = array_map(function ($param) {
                return Container::make($param->getClass()->name);
            }, $constructor->getParameters());

            return $reflection->newInstanceArgs($args);
        } else {
            return new $className();
        }
    }
}

$b = Container::make(B::class); // no problem
$a = Container::make(A::class); // Too few arguments exception
var_dump($a->getB());