--TEST--
SPL: Iterator using getInnerIterator
--FILE--
<?php

class RecursiceArrayIterator extends ArrayIterator implements RecursiveIterator
{
    function hasChildren(): bool
    {
        return is_array($this->current());
    }

    function getChildren(): RecursiceArrayIterator
    {
        return new RecursiceArrayIterator($this->current());
    }
}

class CrashIterator extends FilterIterator implements RecursiveIterator
{
    function accept(): bool
    {
        return true;
    }

    function hasChildren(): bool
    {
        return $this->getInnerIterator()->hasChildren();
    }

    function getChildren(): RecursiceArrayIterator
    {
        return new RecursiceArrayIterator($this->getInnerIterator()->current());
    }
}

$array = array(1, 2 => array(21, 22 => array(221, 222), 23 => array(231)), 3);

$dir = new RecursiveIteratorIterator(new CrashIterator(new RecursiceArrayIterator($array)), RecursiveIteratorIterator::LEAVES_ONLY);

foreach ($dir as $file) {
    print "$file\n";
}

?>
--EXPECT--
1
21
221
222
231
3