PHP反射和注入

我有一个类，该类缓存已通过反射实例化的其他类。是否可以从缓存类中执行函数，而不注入已缓存的所有其他内容？以下是一个例子：

<?php

class cache
{
    private $cache = [];

    public function __construct()
    {
        $test1 = new ReflectionClass('test1');
        $this->cache['test1'] = $test1->newInstanceWithoutConstructor();

        $test2 = new ReflectionClass('test2');
        $this->cache['test2'] = $test2->newInstanceWithoutConstructor();
        $this->cache['test2']->init($this);
    }

    public function say_hello($text)
    {
        echo $text;
    }
}

class test1
{
    public $data = 'foobar';
}

class test2
{
    public function init($con)
    {
        $con->say_hello('hello there');
    }
}

new cache;