<?php

class FooIterator extends ArrayIterator
{
    public function key()
    {
        return $this->current()->getKey();
    }
}

class Foo
{
    public function __construct($key, $value)
    {
        $this->key = $key;
        $this->value = $value;
    }
    
    public function getKey()
    {
        return $this->key;
    }
    
    public function getName()
    {
        return $this->name;
    }
}

$arr = [
    new Foo('aaa','value a'),
    new Foo('bbb','value b'),
    new Foo('ccc','value c'),
];

$iterator = new FooIterator($arr);

$arr = iterator_to_array($iterator);

dump(array_key_exists('bbb', $arr));

^ true

• Using Closures in OOP
• Create a queue with value-priorities
• Checking if a transaction is still open in PDO

PHP 8.3, Laminas MVC 3.2, Symfony 5.2, Laravel 8.28, PHPUnit 9.5, Doctrine ORM 2.8