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[Kristina Hoeppner <2004137@xxxxxxxxxxxxxxxxxx>]

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https://bugs.launchpad.net/bugs/2004137

Title:
  PHP 8 compatibility causing error with PHP 7.4 for XML-RPC

Status in Mahara 22.10 series:
  Fix Released
Status in Mahara 23.04 series:
  Fix Released

Bug description:
  Mahara: 22.10.0
  DB: Postgres 14.3
  OS: Linux 20.04
  Browser: n/a

  The use of "mixed" type is supported in PHP 8.0+.

  It was introduced in this file:

  https://reviews.mahara.org/c/mahara/+/12921/28/htdocs/lib/applicationset.php

  with 2 functions:

  1. current() : mixed
  2. key() : mixed

  With PHP 7.4, when configuring institutions with Moodle integration
  (XML-RPC for example), the following error is received:

  "PHP message: [WAR] 40 (lib/errors.php:529) [TypeError]: Return value
  of ApplicationSet::current() must be an instance of mixed, instance of
  Application returned at /var/www/site/lib/applicationset.php:45

  A type should not be set for these functions until it's fully
  implemented for PHP 8.0+.

  I only found those 2 instances in Mahara 22.10

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