Can't create socket about cups-ipp HOT 2 CLOSED

Actually this file is not the Client class of smalot/cups but it is this one:
vendor/php-http/socket-client/src/Client.php

However: This message might be thrown if you just create the client object like this:
$client = new \Smalot\Cups\Transport\Client(),
while the CUPS server is not running on the same machine as the PHP code.
Try this instead:
$client = new \Smalot\Cups\Transport\Client("username", "password" ["remote_socket" => "tcp://remote_ip:631"]) (replace "remote_ip" with the actual IP )

from cups-ipp.

Thank @chriskonnertz

from cups-ipp.