PHP Parent Array Iterator

iterator.php

<?php

$data = array(
	array(
		'id' => 1,
		'children' => array(
			array(
				'id' => 12,
				'children' => array(

				)
			),
			array(
				'id' => 13,
				'children' => array(
					array(
						'id' => 131,
						'children' => array(
							array(
								'id' => 1311,
								'children' => array(

								)
							)
						)
					)
				)
			),
			array(
				'id' => 14,
				'children' => array(

				)
			)
		)
	)
);

function search_in_array($needle, $haystack) {
    $path = array();

    $it = new RecursiveIteratorIterator(
        new ParentIterator(new RecursiveArrayIterator($haystack)),
        RecursiveIteratorIterator::SELF_FIRST
    );

    foreach ($it as $key => $value) {
        if (array_key_exists('id', $value) && strcasecmp($value['id'], $needle) === 0) {
            $path = $value;
            break;
        }
    }

    return $path;
}

var_dump(search_in_array(1311, $data));