Perl Requires Chilkat v11.7.0+

QR Code Numeric, Alphanumeric and Byte Modes

See more QR Code Examples

Demonstrates the QR encoding modes. Digits alone are stored in numeric mode, and text made only of digits, upper-case letters, space and $ % * + - . / : in alphanumeric mode. Both pack more characters into a symbol than byte mode, which is used for everything else. QrCode chooses the most compact mode the text allows, and the response reports it. A product code written in upper case therefore gives a smaller symbol than the same code in lower case. Chilkat2 Perl

use strict;
use warnings;
use Chilkat2;

# This example requires the Chilkat API to have been previously unlocked.
# See Global Unlock Sample for sample code.

my $fmt = Chilkat2::Formats->new;
my $json = Chilkat2::JsonObject->new;
my $jsonOut = Chilkat2::JsonObject->new;

# Digits only.
$json->UpdateString('payload.text', '00123456789012345678');
my $success = $fmt->QrCode('generate', $json, $jsonOut);
if (!$success) {
    print $fmt->LastErrorText, "\n";
    exit;
}

print 'digits: mode ', $jsonOut->StringOf('symbols[0].selectedEncoding.mode'), ', version ', $jsonOut->IntOf('symbols[0].selectedEncoding.version'), "\n";

# Upper-case letters, digits, space and - are all in the alphanumeric set.
$json->UpdateString('payload.text', 'ORDER-12345 LOT A7 SHELF 12-C');
$success = $fmt->QrCode('generate', $json, $jsonOut);
if (!$success) {
    print $fmt->LastErrorText, "\n";
    exit;
}

print 'upper case: mode ', $jsonOut->StringOf('symbols[0].selectedEncoding.mode'), ', version ', $jsonOut->IntOf('symbols[0].selectedEncoding.version'), "\n";

# Lower-case letters are not, so the same text in lower case needs byte mode.
$json->UpdateString('payload.text', 'order-12345 lot a7 shelf 12-c');
$success = $fmt->QrCode('generate', $json, $jsonOut);
if (!$success) {
    print $fmt->LastErrorText, "\n";
    exit;
}

print 'lower case: mode ', $jsonOut->StringOf('symbols[0].selectedEncoding.mode'), ', version ', $jsonOut->IntOf('symbols[0].selectedEncoding.version'), "\n";

# The mode can be named.  Byte mode can hold any text.  Naming a mode the text cannot use
# (numeric for text with letters, for example) fails with conflictingOptions.
$json->UpdateString('payload.text', '00123456789012345678');
$json->UpdateString('encoding.qr.mode', 'byte');
$success = $fmt->QrCode('generate', $json, $jsonOut);
if (!$success) {
    print $fmt->LastErrorText, "\n";
    exit;
}

print 'digits as bytes: mode ', $jsonOut->StringOf('symbols[0].selectedEncoding.mode'), ', version ', $jsonOut->IntOf('symbols[0].selectedEncoding.version'), "\n";

# The four symbols, in the order they were made:

# 

# Sample output:

# digits: mode numeric, version 1
# upper case: mode alphanumeric, version 2
# lower case: mode byte, version 3
# digits as bytes: mode byte, version 2