$cfg['obj1'] = ['param1'=>'value1', 'param2'=>'value2'];
...

class Class1
{
  private $var1;
  private $var2;
  private $config = $cfg[obj1'];
  function __construct()
  {
    $var1 = dbquery($config['param1'], $config['param2']);
  }
  function method1()
  {
    return $var1['field1'];
  }
}

...
$unifi = new UnifiClass(['username'=>'admin', 'password'=>'password']);
...
print_r($unifi->group_list());
...

class UnifiClass
{

	private $config = ['interface'=>"eth1", 'url'=>"https://10.10.0.250:8443"];
	private $curl;
	private $session;

	function __construct($params = null)
	{
		foreach ($params as $k=>$v)
		{
			$this->config[$k] = $v;
		}
		$this->session = "123";
		return $this->_init();
	}

	function __destruct()
	{
		$this->_close();
		$this->session = null;
		$this->curl = null;
		return true;
	}

	private function _has_curl()
	{
		return in_array('curl', get_loaded_extensions()) ? true : false;
	}

	private function _init()
	{
		if (! $this->_has_curl()) return false;
		$this->curl = curl_init();
		if ($this->curl===false) return false;
		$hdr = fopen("php://memory", "r+");
		//curl_reset($this->curl);
		curl_setopt($this->curl, CURLOPT_SSLVERSION, 3);
		curl_setopt($this->curl, CURLOPT_SSL_VERIFYHOST, false);
		curl_setopt($this->curl, CURLOPT_SSL_VERIFYPEER, false);
		curl_setopt($this->curl, CURLOPT_URL, "{$this->config['url']}/login");
		curl_setopt($this->curl, CURLOPT_WRITEHEADER, $hdr);
		curl_setopt($this->curl, CURLOPT_POST, true);
		curl_setopt($this->curl, CURLOPT_POSTFIELDS, http_build_query(array('login'=>'login','username'=>$this->config['username'],'password'=>$this->config['password'])));
		$ret = curl_exec($this->curl);
		if ($ret === false) return "Ошибка запроса: " . curl_error($this->curl);
		rewind($hdr);
		$cookie = array();
		while($line = fgets($hdr))
		{
			$line = rtrim($line);
			$p = strpos($line,': ');
			if ($p !== false)
			{
				if (substr($line,0,$p+2) === 'Set-Cookie: ')
				{
					$line = substr($line,$p+2);
					if (strpos($line,'; ') !== false) $line = substr($line,0,strpos($line,'; '));
					$cookie[] = $line;
				}
			}
		}
		//curl_setopt($this->curl, CURLOPT_WRITEHEADER, null);
		//fclose($hdr);
		//curl_reset($this->curl);
		$this->session = implode('; ',$cookie);
		return true;
	}

	private function _close()
	{
		if (!empty($this->curl)) curl_close($this->curl);
	}

	private function _query($url, $data=null, $options=null)
	{
		if (empty($this->session)) return false;
		//curl_reset($this->curl);
		curl_setopt($this->curl, CURLOPT_SSLVERSION, 3);
		curl_setopt($this->curl, CURLOPT_SSL_VERIFYHOST, false);
		curl_setopt($this->curl, CURLOPT_SSL_VERIFYPEER, false);
		curl_setopt($this->curl, CURLOPT_URL, "{$this->config['url']}/api/{$url}");
		curl_setopt($this->curl, CURLOPT_HTTPHEADER, array("Cookie: $this->session"));
		curl_setopt($this->curl, CURLOPT_RETURNTRANSFER, 1);
		curl_setopt($this->curl, CURLOPT_POST, true);
		if (isset($options)) curl_setopt_array($this->curl, $options);
		if (is_array($data))
		{
			if (count($data)==0)
			{
				curl_setopt($unifi_curl, CURLOPT_POSTFIELDS, http_build_query(['json'=>"{}"]));
			}
			else
			{
				$is_assoc = (bool)count(array_filter(array_keys($data), 'is_string'));
				curl_setopt($unifi_curl, CURLOPT_POSTFIELDS, http_build_query(['json'=>json_encode($data)]));
			}
		}
		else
		{
			if (isset($data)) curl_setopt($this->curl, CURLOPT_POSTFIELDS, $data);
		}
		$res = curl_exec($this->curl);
		if ($res !== false)
		{
			$res = json_decode($res,true);
			if ($res['meta']['rc'] == 'ok')
			{
				return $res['data'];
			}
			elseif ($res['meta']['rc'] == 'error')
			{
				return "Ошибка: " . $res['meta']['msg'];
			}
			else
			{
				return "Ошибка: " . $res;
			}
		}
		else
		{
			return "Ошибка запроса: " . curl_error($this->curl);
		}
	}

	function group_list()
	{
		return $this->_query("list/usergroup");
	}

}

class UnifiClass
{
	function ap($mac) {
		$obj = new UnifiApClass($this, $mac);
		return $obj;
	}
	function sta($mac) {
		$obj = new UnifiStaClass($this, $mac);
		return $obj;
	}
}
class UnifiApClass
{
	private $unifi;
	private $mac;
	private $data;

	function __construct($unifi, $mac) {
		$this->unifi = $unifi;
		$data = $this->unifi->ap_list(['mac'=>$mac]);
		return true;
	}
	function state() {
		if (empty($this->data)) return false;
		return $this->data['state'];
	}
	function refresh() {
		$this->data = $this->unifi->ap_list(['mac'=>$mac]);
	}
}

$unifi = new UnifiClass;
$ap = $unifi->ap('...');
echo $ap->state();