Opencart 3, composer install dompdf - composer-php

Question

How can I use composer to install dompdf, and load this into a controller class in opencart 3.
I have tried to use composer require dompdf... however this doesn't work, I'm not sure what directory this needs to be run in

Answer 1

In your composer.json file, add the Dompdf package:
{
"require": {
"dompdf/dompdf": "dev-master"
}
}
And then run: composer update
To use DOMPDF in an opencart controller, all you have to do is:
<?php
class ControllerExampleEmail extends Controller {
public function index() {
$dompdf = new DOMPDF();
}
}
It's auto-loaded by OpenCart itself.

Answer 2

Only really posting this as an answer to get the formatting, but I was just looking at exactly the same thing (adding DOMPDF to OpenCart 3) and (having already done the composer bit) have gotten this far (which will spit out a PDF):
<?xml version="1.0" encoding="utf-8"?>
<modification>
<name>DOMPDF Test</name>
<code>dompdftest</code>
<version>3.0.3x</version>
<author>TH</author>
<link></link>
<file path="system/library/response.php">
<operation error="abort">
<comment>Use the class</comment>
<search><![CDATA[class Response {]]></search>
<add position="before"><![CDATA[
use Dompdf\Dompdf;
]]></add>
</operation>
<operation error="abort">
<comment>Output to PDF instead of HTML</comment>
<search><![CDATA[private $output;]]></search>
<add position="after"><![CDATA[
// TH
public function writePDF($input,$filename) {
$dompdf = new Dompdf();
$dompdf->loadHtml($input);
$dompdf->setPaper('A4', 'portrait');
$dompdf->render();
$dompdf->stream($filename);
}
// /TH
]]></add>
</operation>
</file>
</modification>
Have only tested this insofar as it spits out a PDF, it could well be wrong/not the best way to do it.