this script will print qrcode from php script. the printer is attached on webserver usb port, see my other article here: http://code.activestate.com/recipes/578925-print-directly-from-web-application-to-poseps-ther/
and python escpos references: https://code.google.com/p/python-escpos/wiki/Usage
PHP, 59 lines
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Copy to clipboard1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 | <?php
//printer setup
$printer="/dev/usb/lp0";
//formating qrcode
$text="hello i am printed from web at ".date("d/m/Y H:i:s");
function mystrtohex($str) {
$ret="";for($i=0;$i< strlen($str); $i++){$ret.="\\x".bin2hex($str[$i]);}
//need to use eval for "push" real hex values
eval("\$ret=\"".$ret."\";");
return $ret;
}
//https://code.google.com/p/python-escpos/wiki/Usage
//1.Set the Module Function 167 n between 1 and 16 (decimal) in hex
//1D 28 6B 03 00 31 43 n
$string= "\x1D\x28\x6B\x03\x00\x31\x43\x04";
//2.Set correction error level Function 169 n \x30 -> 7% L \x31 -> 15% M \x32 -> 25% Q \x33 -> 30% H
//1D 28 6B 03 00 31 45 n
$string .= "\x1D\x28\x6B\x03\x00\x31\x45\x33";
//3.Store Data Function 180 -> n storage chars (see below) + 3
//1D 28 6B n 00 31 50 30
//Note 0d = 13 chars
//need to use eval for "push" real hex values
eval("\$yy=\"\\x"."1D"."\\x"."28"."\\x"."6B"."\\x".sprintf("%02x",strlen($text)+3)."\\x"."00"."\\x"."31"."\\x"."50"."\\x"."30\";");
$string.=$yy;
//3.DATA 10 chars
//56 69 76 61 20 43 68 69 6c 65
//$data="\x56\x69\x76\x61\x20\x43\x68\x69\x6c\x65"; // 10 chars
$string .=mystrtohex($text);
//4.PRINT Function 181
//1D 28 6B 03 00 31 51 30
$string .= "\x1D\x28\x6B\x03\x00\x31\x51\x30";
//5.cut paper at end
// line feed , cut paper
$string .= "\x00\x1B\x33\x00"."\x1D\x56\x42\x00"; //."\x00\x1B\x32"; //line feed, and cut paper...
//end.formating qrcode
//send data to USB printer
$fp=fopen($printer, 'w');
fwrite($fp,$string);
fclose($fp);
?>
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