PHP链接MongoDB

class Mongo

{

private static $client;

private static $mongoDb;

private function __construct()

{

self::$client = new \MongoDB\Driver\Manager("mongodb://账号:密码@ip:端口");

}

private function __clone()

{

}

public static function get_instance()

{

if(!self::$mongoDb instanceof self){

return new self();

}

return self::$mongoDb;

}

public static function get_client()

{

return self::$client;

}

}