How to access and manipulate multi-dimensional array by key names / path?

Question

I\'ve to implement a setter in PHP, that allows me to specify the key, or sub key, of an array (the target), passing the name as a dot-separated-keys value.

Answer 1

Yet another solution for getter, using plain array_reduce method

@AbraCadaver's solution is nice, but not complete:

• missing optional separator parameter & split if required
• it raises an error in case of trying to obtain a key from a scalar value like 'one.two' from ['one' => 2]

My solution is:

function get ($array, $path, $separator = '.') {
    if (is_string($path)) {
        $path = explode($separator, $path);
    }

    return array_reduce(
        $path,
        function ($carry, $item) {
            return $carry[$item] ?? null;
        },
        $array
    );
}

it requires PHP 7 due to ?? operator, but this can be changed for older versions pretty easy ...