think\Collection::reduce PHP Méthode

通过使用用户自定义函数，以字符串返回数组

public reduce ( callable $callback, mixed $initial = null ) : mixed
$callback	callable
$initial	mixed
Résultat	mixed

    public function reduce(callable $callback, $initial = null)
    {
        return array_reduce($this->items, $callback, $initial);
    }

Collection