How can PHP be utilized to communicate with a printer connected to a server without relying on external programs or client-side installations?

To communicate with a printer connected to a server using PHP without relying on external programs or client-side installations, you can utilize the PHP printer extension. This extension allows you to send raw data directly to the printer without the need for additional software or drivers.

$printer = printer_open();
printer_write($printer, "Hello, Printer!");
printer_close($printer);