HTML2PDF How to pass id to the html site to be converted - php

Question

I´ve started using HTML2PDF (https://www.html2pdf.fr/) to create invoices, now the following code works:
try {
ob_end_clean();
ob_start();
include('../faktura/fa.php');
$html = ob_get_contents();
ob_end_clean();
$content = $html;
$html2pdf = new Html2Pdf('P', 'A4', 'cs',true,"UTF-8");
$html2pdf->setDefaultFont('freeserif');
$html2pdf->pdf->SetFont('freeserif');
$html2pdf->writeHTML($content);
$pdfContent = $html2pdf->output('my_doc.pdf', 'S');
} catch (Html2PdfException $e) {
$html2pdf->clean();
$formatter = new ExceptionFormatter($e);
echo $formatter->getHtmlMessage();
}
The content of fa.php is converted to pdf, however if I change one of the lines to:
include('../faktura/fa.php?id=105');
note that I only added ?id=105, it returns only a blank page.
The php file fa.php includes:
$id = (int) $_GET['id'];
What I need to do is to pass an ID to that php script so the invoice of the exact order is generated.

Answer 1

Include basically means "copy the code from that file to here".
So if you change the included file code from $id = (int) $_GET['id']; to $id = $thatId;
And prior to the include() function you'd write $thatId = 105;
The included file will be able to access the variable.
File A:
$id = 105;
include('../faktura/fa.php');
File fa.php
//$id = (int) $_GET['id']; // no need this anymore as we've declared a $id variable with a value;
// .. Do something with $id
// .. for example:
echo $id; //will print 105
Or, in case you want fa.php to continue working with QUERY PARAMETER and to work with your invoice (2pdf) code:
if(!isset($id) && isset($_GET['id'])) {
$id = (int) $_GET['id'];
}