<?php

$i = new ArrayIterator(array(1,7,9));

$ci = new CachingIterator($i, CachingIterator::FULL_CACHE);

foreach($ci as $value) {
    echo $value . PHP_EOL;
    dump($ci->getCache());
}


1

^ array:1 [

  0 => 1

]

7

^ array:2 [

  0 => 1

  1 => 7

]

9

^ array:3 [

  0 => 1

  1 => 7

  2 => 9

]

• Handling empty heaps
• Create a queue with value-priorities
• Create an instance without calling constructor of the class

PHP 8.0, Laminas MVC 3.2, Symfony 5.2, Laravel 8.28, PHPUnit 9.5, Doctrine ORM 2.8