Writing to File

I have a simple form to download a PDF. When the form is summited the following script run.

`<?php
// We’ll be outputting a PDF
header(‘Content-type: application/pdf’);
// It will be called downloaded.pdf
header(‘Content-Disposition: attachment; filename=”CoPay-Saving-Card.pdf”‘);
// The PDF source is in original.pdf
readfile(‘https://savings-card.com/wp-content/themes/savingcard/documents/Saving-Card-v2.pdf&#8217;);
?>’

But when I have the iThemes plugin active it ignore the readfile and creates a PDF with the the above name that is a 1k file.

I’ve tried to disable elements of the plugin but I think the issue is related to all the content written to the htacess file.

Could really use some help solving this as I would like to go back to using the plugin.

Thank You