<?php

use Symfony\Component\DependencyInjection\ContainerBuilder;
use Symfony\Component\DependencyInjection\Definition;

class Foo
{
    private $ao;
    
    public function __construct(ArrayObject $bar)
    {
        $this->ao = $bar;
    }
    
    public function getObject()
    {
        $this->ao[md5(microtime())] = '';
        return $this->ao;
    }
}

$arrDefinition = new Definition('ArrayObject');
$fooDefinition = new Definition('Foo');
$fooDefinition->setPublic(true);
// autowired: get dependency by type hint of Foo class
$fooDefinition->setAutowired(true);

// set definitions in container builder
$containerBuilder = new ContainerBuilder();
$containerBuilder->setDefinition('Foo', $fooDefinition);
$containerBuilder->setDefinition('ArrayObject', $arrDefinition);
$containerBuilder->compile();

// calling Foo service
dump($containerBuilder->get('Foo')->getObject());
dump($containerBuilder->get('Foo')->getObject());

^ ArrayObject {#1491

  -storage: array:1 [

    "a899e382db8f5be73f0fcd34fc9a2516" => ""

  ]

  flag::STD_PROP_LIST: false

  flag::ARRAY_AS_PROPS: false

  iteratorClass: "ArrayIterator"

}

^ ArrayObject {#1491

  -storage: array:2 [

    "a899e382db8f5be73f0fcd34fc9a2516" => ""

    "9b7cf5b259771ae26a408b09b9600b35" => ""

  ]

  flag::STD_PROP_LIST: false

  flag::ARRAY_AS_PROPS: false

  iteratorClass: "ArrayIterator"

}

• Symfony DI Container outside Symfony
• Simple Symfony Session
• Vardumper: Symfony's answer to var_dump

PHP 8.2, Laminas MVC 3.2, Symfony 5.2, Laravel 8.28, PHPUnit 9.5, Doctrine ORM 2.8