I am using mPDF to output code written in PHP to pdf.
I was trying to take 3 php pages and print them all to 1 PDF.
The first thing I did was add the following:
$mpdf->debug = true;
This then allowed the error to be shown. It was "Output has already been sent from the script - PDF file generation aborted."
I ended up figure it out that I was missing ob_end_clean().
Here is the final code:
$page3 = ob_get_contents();