Check php array against a shape

array_has_missing_keys.php

<?php
function array_has_missing_keys(array $shape, array $payload, ?array &$missing): bool
{
    foreach ($shape as $k => $v) {
        if (!is_array($v)) {
            if (!array_key_exists($v, $payload)) {
                $missing[] = $v;
            }
            continue;
        }

        $diff = [];
        if (array_has_missing_keys($shape[$k], $payload[$k] ?? [], $diff)) {
            $missing[$k] = $diff;
        } elseif (!array_key_exists($k, $payload)) {
            $missing[] = $k;
        }
    }

    return !empty($missing);
}