https://www.php.net/manual/it/mongodb-driver-server.isarbiter.php
PHP: MongoDB\Driver\Server::isArbiter - Manual
Checks if this server is an arbiter member of a replica set
phpmongodbdriverservermanual
https://www.php.net/manual/uk/mongodb-driver-server.isarbiter.php
PHP: MongoDB\Driver\Server::isArbiter - Manual
Checks if this server is an arbiter member of a replica set
phpmongodbdriverservermanual