How can I generate QR Codes from a string in PHP? - php

Question

I've been playing around trying to generate QR Codes from a string without any luck. I'm using CodeIgniter. I've tried 2 different packages from Packagist, bacon/bacon-qr-code, and endroid/qrcode. Below is the code in my controller for Bacon :
$renderer = new \BaconQrCode\Renderer\Image\Png();
$renderer->setHeight(256);
$renderer->setWidth(256);
$writer = new \BaconQrCode\Writer($renderer);
$writer->writeFile('Hello World!', 'qrcode.png');
When I run this code I get the error 'The phpass class file was not found'.
So I then installed phpass through spark, and I still get the same error. Can anyone tell me what I'm doing wrong?

Answer 1

First one is working as well (probably second one too).
You need to use it this way (at least):
APPPATH . 'libraries/Qrcode.php'
<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
use \BaconQrCode\Renderer\Image\Png;
use \BaconQrCode\Writer;
class Qrcode
{
public function test()
{
$renderer = new Png();
$renderer->setHeight(256);
$renderer->setWidth(256);
$writer = new Writer($renderer);
$writer->writeFile('Hello World!', 'qrcode.png');
//var_dump($writer);
}
}
APPPATH . 'controllers/Test.php'
<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
class Test extends CI_Controller
{
public function __construct()
{
parent::__construct();
}
public function index()
{
$this->qrcode();
}
public function qrcode()
{
$this->load->library('qrcode');
$this->qrcode->test();
}
}
And image will be generated in FCPATH . 'qrcode.png' file.

Answer 2

you can generate QR Codes of string using Google QR Codes API.
https://chart.googleapis.com/chart?chs=300x300&cht=qr&chl=Hello+world&choe=UTF-8
300x300 is your image size.
chl - a url encoded string to convert it into qr code.