PHP 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 PHP

<?php

use Chilkat2\Formats;
use Chilkat2\JsonObject;

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

$fmt = new Formats();
$json = new JsonObject();
$jsonOut = new JsonObject();

// Digits only.
$json->UpdateString('payload.text', '00123456789012345678');
try {
    $fmt->QrCode('generate', $json, $jsonOut);
} catch (\Chilkat2\Exception $e) {
    echo $e->getMessage(), "\n";
    exit;
}

echo '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');
try {
    $fmt->QrCode('generate', $json, $jsonOut);
} catch (\Chilkat2\Exception $e) {
    echo $e->getMessage(), "\n";
    exit;
}

echo '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');
try {
    $fmt->QrCode('generate', $json, $jsonOut);
} catch (\Chilkat2\Exception $e) {
    echo $e->getMessage(), "\n";
    exit;
}

echo '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');
try {
    $fmt->QrCode('generate', $json, $jsonOut);
} catch (\Chilkat2\Exception $e) {
    echo $e->getMessage(), "\n";
    exit;
}

echo '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