{

private array $store = [];

private array $expiries = [];

public function get(string $key, mixed $default = null): mixed

{

if (! $this->has($key)) {

return $default;

}

return $this->store[$key];

}

public function set(string $key, mixed $value, DateInterval|int|null $ttl = null): bool

{

$this->store[$key] = $value;

$this->expiries[$key] = $this->calculateExpiry($ttl);

return true;

}

public function delete(string $key): bool

{

unset($this->store[$key], $this->expiries[$key]);

return true;

}

public function clear(): bool

{

$this->store = [];

$this->expiries = [];

return true;

}

public function getMultiple(iterable $keys, mixed $default = null): iterable

{

$result = [];

foreach ($keys as $key) {

$result[$key] = $this->get($key, $default);

}

return $result;

}

public function setMultiple(iterable $values, DateInterval|int|null $ttl = null): bool

{

$expiry = $this->calculateExpiry($ttl);

foreach ($values as $key => $value) {

$this->store[$key] = $value;

$this->expiries[$key] = $expiry;

}

return true;

}

public function deleteMultiple(iterable $keys): bool

{

foreach ($keys as $key) {

unset($this->store[$key], $this->expiries[$key]);

}

return true;

}

public function has(string $key): bool

{

if (! isset($this->store[$key])) {

return false;

}

// Check expiry

if (isset($this->expiries[$key]) && $this->expiries[$key] !== null && time() >= $this->expiries[$key]) {

$this->delete($key);

return false;

}

return true;

}

private function calculateExpiry(DateInterval|int|null $ttl): ?int

{

if ($ttl === null) {

return null; // No expiry

}

if (is_int($ttl)) {

return time() + $ttl;

}

if ($ttl instanceof DateInterval) {

return (new DateTime())->add($ttl)->getTimestamp();

}

// Invalid TTL type, treat as no expiry

return null;

}