PHP Printing Text Problem

i want to print directly to a printer using PHP, but i have a problem..

It showed up in the printer's queue, but it didn't print at all.. the status change from print to delete in a split second

Here's the code i'm using :

if($ph = printer_open('EPSON TM-U210B Partial cut')){
     printer_set_option($ph, PRINTER_MODE, "raw");
     printer_write($ph, 'testing');
     printe开发者_如何学编程r_close($ph);
}

thanks

---

you'll have to start a document and create a page in it to write on. The result should look like this:

<?php
$ph= printer_open('EPSON TM-U210B Partial cut');
printer_start_doc($ph, "My Test-Document");
printer_start_page($ph);

// your code here
printer_write($ph, 'test 123 ...');

printer_end_page($ph);
printer_end_doc($ph);
printer_close($ph);
?>