pdf-conversion.php

<?php

/*
    Assuming that all the data is the same "form", we can simply grab the data from the request
    and render it as HTML, then convert that HTML doument to a PDF using the DomPDF library.
*/

// Grab the request data
$request = $_POST;


// Build our template with the data from the request
// Note: when doing html to PDF type stuff, table layouts are usually the way to go.
$template = <<<EOT
<h1>Super Important Form</h1>
<table border="1">
  <tr>
    <th>Your Name</th>
    <th>{$request['invoiceId']}</th>
  </tr>
  <tr>
    <td>Your favorite color</td>
    <td>{$request['favoriteColor']}</td>
  </tr>
  <tr>
    <td>Your Age</td>
    <td>{$request['age']}</td>
  </tr>
</table>
EOT;


// Create our instance of DomPDF
$dompdf = new Dompdf\Dompdf();

// Load the template we built
$dompdf->loadHtml($template);

// Set the size of the pdf document and the orientation
$dompdf->setPaper("A4", "portrait");

// "Builds" the pdf internally
$dompdf->render();


// Now we can either SAVE it by doing this:
file_put_contents("/some/directory/my-file.pdf", $dompdf->output());

// OR

// stream it to the browser (trigger a download dialog)
$dompdf->stream("my-file.pdf");