A simple \Traversable based on an array

SimpleArrayTraversable.php

<?php
    
class SimpleArrayTraversable implements \IteratorAggregate
{
    private $data;
    
    public function __construct($a, $b, $c)
    {
        $this->data = [$a, $b, $c];
    }
    
    public function getIterator()
    {
        return (function() {
            yield from $this->data;
        })();
    }
}


$list = new SimpleArrayTraversable('1', '2', '3');
foreach ($list as $key => $value) {
    var_dump([$key, $value]);
}