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Editorial Team
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Asked: 2026-06-16T16:38:18+00:00

I own Sewoo Thermal Printer that is connected to a local PHP point of

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I own Sewoo Thermal Printer that is connected to a local PHP point of sale. Now as a simple print test using php, I wrote the following code :

<?php
$handle = printer_open("THERMAL LK-TXXX");
$handle = printer_open();
?>

And I got this Error :

Fatal error: Call to undefined function printer_open() in C:\wamp\www\frame\reciept.php on line 2

I’m using Wampp as my web server, Windows 7 and I’ve installed the correct drivers for my printer.
How can i fix this problem, Or is there an alternative “Print” methode using PHP to automatically print without showing Print preview?

Thank You

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1 Answer

  1. Editorial Team

    A POS printer is (mostly) not a printer in the sense of using the Windows printing functions to create output, that is quite independent of the device, but simply a sink for serial data in the printer’s control language (we built a ticketing system driving very similar printers).

    One approach is to user the Win32API extension for PHP and the OpenDriver API, but this turns out to be quite a mess. Best way is to simply fopen() the printer port and write your PCL data via fwrite()

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