Issue #2882046 by Mingsong, jcnventura, RenatoG: PDF file is not updated after a book page node is changed

Issue #2012852 by rsmylski, jcnventura, asennus1, Nathaniel, milodesc: Cannot modify header information error in logs

Issue #3025620 by DanChadwick, jcnventura: Email rules integration broken by 7.x-2.2, PHP Warning array_key_exists

Issue #2276275 by freality, jcnventura, SureshKM: Notice: Undefined offset: 1 in print_pdf_wkhtmltopdf_pdf_tool_version()

Issue #3006747 by somersoft, jcnventura, sjerdo, wylbur, jbiechele: Remove usage of deprecated create_function() calls for PHP 7.2+ future proofing

Issue #3023200 by junaidpv, jcnventura: Use drupal_static() instead of plain static keywork to help overriding URLs in other modules

Issue #2234765 by candelas, thePanz, jcnventura: drush print-pdf-download uses removed mime_type PHP function

Issue #2446939 by stefan.r, Jorrit, jcnventura: PDOException: SQLSTATE[42S22]: Column not found: 1054 Unknown column 'size' in 'field list':

Issue #2194825 by das-peter, k.skarlatos, Jelle_S, enboig, jcnventura: wkhtmltopdf segfaults and returns "unable to generate pdf" in Drupal but works on command line

Issue #2705367 by alex.designworks, skari, jcnventura: wkhtmltopdf produces invalid PDFs that would not open in Chrome

Issue #2990479 by paulvandenburg, Tom Voesenek, jcnventura: Missing isset check in print_pdf_mpdf.pages.inc

Issue #2992512 by paulvandenburg, Tom Voesenek, jcnventura: Don't break the site when transitioning between mpdf tools