Multiples foreach recursively or RecursiveIteratorIterator

Question

I am using this code, that works well. However seems like not the best option due the multiples foreach.

foreach ($arr_items as $key => $value) {
    $id_user = $key;
    foreach ($value as $k => $v) {
        foreach ($v as $x => $y) {
            $id_transacao = $y['id_transacao'];
            $id_duplicated = $y['id_duplicated'];
            foreach ($y as $g => $b) {
                if (is_array($b)){
                    foreach ($b as $kn => $l) {
                        var_dump($id_user);
                        var_dump($id_transacao);
                        var_dump($id_duplicated);
                        var_dump($l);
                    }
                }
            }
        }
    }
}

This code will outputs a bunch of results, probably fast, but totally disordered.

$iterator = new RecursiveIteratorIterator(new RecursiveArrayIterator($arr_items));

}   

My question is: It's ok if I use first code, or should I try something with the RecursiveIteratorIterator. My problem is that will be difficult to generate the exactly same structure in the second option. Anyway, any optimization will be nice.

Answer 1

Have you tried any of the other constants for the mode parameter on RecursiveIteratorIterator::__construct? The default is RecursiveIteratorIterator::LEAVES_ONLY.

From the Docs

RecursiveIteratorIterator::LEAVES_ONLY - The default. Lists only leaves in iteration.
RecursiveIteratorIterator::SELF_FIRST - Lists leaves and parents in iteration with parents coming first.
RecursiveIteratorIterator::CHILD_FIRST - Lists leaves and parents in iteration with leaves coming first.

Maybe SELF_FIRST is what you need.

$iterator = new RecursiveIteratorIterator(
                new RecursiveArrayIterator($arr_items), 
                RecursiveIteratorIterator::SELF_FIRST);

Answer 2

Along with the RecursiveIteratorIteratorinside the foreach loop, you can use the $filter->getDepth() function to separate the child, self, and grandchild.

You can also set $filter->setMaxDepth(int $depth);.