PHP OOP Inheritance

Mau nanya, saya punya 2 class yaitu parent & child

saya punya method test(); di parent yg panggil properties class nya sendiri pake this, waktu saya warisin ke class child, si method test(); di child tetep panggil properties si parent nya, biar panggil properties nya sendiri gimana ya? Jadi waktu si parent warisin tuh method si child sama parent gapunya hubungan sedarah.

Real codingan nya, saya cuman mau pakai method send dan get message di Client tanpa harus nulis ulang method nya

/** parent
*/{
private string $method = 'aes-128-ctr';
protected string $key;
public function __construct(string $host, int $port)
{
$this->key = openssl_digest(php_uname(), 'SHA256', true);
$this->socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
socket_bind($this->socket, $host, $port);
socket_listen($this->socket);
$this->connection = socket_accept($this->socket);
}
final protected function encryptMessage(string $token) : string
{
$ivLength = openssl_cipher_iv_length($this->method);
$iv = openssl_random_pseudo_bytes($ivLength);
$result = openssl_encrypt($token, $this->method, $key, 0, $iv);
return $result . '::' . bin2hex($iv);
}
final protected function decryptMessage(string $token) : string
{
list($token, $this->initialVector) = explode('::', $token);
return openssl_decrypt(
$token,
$this->method,
$this->key,
0,
hex2bin($this->initialVector)
);
}
public function getMessage() : string
{
$encryptedToken = socket_read($this->connection, 1024);
return $this->decryptMessage($encryptedToken);
}
public function sendMessage(string $message) : bool
{
$encrypted = $this->encryptMessage($message);
return socket_write(
$this->connection,
$encrypted,
strlen($encrypted)
);
}
public function __destruct()
{
socket_close($this->connection);
socket_close($this->socket);
}
}

/** child
*/class Client extends Server
{
public function __construct(string $host, int $port)
{
$this->socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
socket_connect($this->socket, $host, $port);
}
public function __destruct()
{
socket_close($this->socket);
}
}