in_array() and multidimensional array

in_array_multidimensional_array.php

    public function inMultiDimensionalArray($needle, $haystack, $strict = false) {
        foreach ($haystack as $item) {
            if (($strict ? $item === $needle : $item == $needle) || (\is_array($item) && $this->inMultidimensionalArray($needle, $item, $strict))) {
                return true;
            }
        }

        return false;
    }