RecursiveArrayIterator

RecursiveArrayIterator extends ArrayIterator to allow recursive iteration over nested arrays and objects. It implements RecursiveIterator, so it works with RecursiveIteratorIterator to traverse multidimensional arrays depth-first.

<?php

$array = ['a', ['b', 'c'], ['d', ['e', 'f']]];
$iterator = new RecursiveIteratorIterator(
    new RecursiveArrayIterator($array)
);

foreach ($iterator as $value) {
    echo $value . PHP_EOL;
}
// a b c d e f

?>

Documentation

See also RecursiveArrayIterator Class and RecursiveIteratorIterator Class.

Related : Standard PHP Library (SPL), Iterator, Array, Recursion, Recursive Array, RecursiveIterator, SplSubject

Added in PHP 5.1