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[Robert Lyon <robertl@xxxxxxxxxxxxxxx>]

** Changed in: mahara/17.04
    Milestone: 17.04.7 => None

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https://bugs.launchpad.net/bugs/1757330

Title:
  Export file Session Data not saved in PHP 7.1+

Status in Mahara:
  Fix Committed
Status in Mahara 17.04 series:
  Won't Fix
Status in Mahara 17.10 series:
  Confirmed
Status in Mahara 18.04 series:
  Fix Committed
Status in Mahara 18.10 series:
  Fix Committed

Bug description:
  Mahara 17.10.3 (alo occurs on Mahara 17.10.0)
  Operating system: Ubuntu, apache2, PHP 7.1.8 (also occurs on PHP 7.1.15 and PHP 7.1.3)
  Database; MySQL
  Browser: Chrome.

  Exporting files in Mahara
  /export/index.php

  Export Either LEAP file or Standalone HTML
  click Generate Export
  in the iframe - the /export/download.php redirects back to the export/index.php file and nothing is downloaded - the progress iframe now shows the /export/index.php page.

  Possible Cause:
  Download.php (export/download.php) as this located at the bottom of the page (~ line 106)
  $SESSION->set('exportfile', $exporter->get('exportdir') . $zipfile);

  At the top of the page it checks to see if this session data exists - and if so - to force the download of the file.
  line 17: 
  if ($exportfile = $SESSION->get('exportfile')) {
      $SESSION->set('exportdata', '');
      $SESSION->set('exportfile', '');
      require_once('file.php');
      serve_file($exportfile, basename($exportfile), 'application/x-zip', array('lifetime' => 0, 'forcedownload' => true));
      exit;
  }

  In PHP 7.1.3 and higher - the $SESSION->get('exportfile') is empty
  when the JS redirect calls this page (from the print_export_footer
  function) and the session data set at the bottom of the page is not
  present when the page is being loaded to get the file. (loading the
  /export/index.php again will empty the exportfile data).

  The export works as expected in PHP 7, but fails in PHP 7.1+.

  Is Mahara 7.1+ ready?

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