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[tjakes <1991591@xxxxxxxxxxxxxxxxxx>]

Hi Robert,
the error occurred in the admin section. 
On your demo site it should be at: https://demo.mahara.org/admin/groups/groups.php (button copy). However, I do not have access to the admin section. Can you please verify this?

The name of the course was, for example "2021/2022 KPG/9ITV Informační a
komunikační technologie ve vzdělávání".

Copying from https://demo.mahara.org/group/nova-skupina-cestiny-dtn on
the demo site actualy worked.

Regards
Tom

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https://bugs.launchpad.net/bugs/1991591

Title:
  Group cloning fails - problem with multibyte UTF8

Status in Mahara:
  Incomplete

Bug description:
  If the user tries to clone a group named with special characters
  (mb4), the cloning will fail.

  The bug is in version 21.10.04 and maybe elsewhere.

  It is caused by an error in the lib/group.php script on line 377.
  Here, strtolower is mistakenly used instead of mb_strtolower.

  The code on the line should be:
  if (get_records_sql_array('SELECT id FROM {group} WHERE LOWER(TRIM(name)) = ?', array(mb_strtolower(trim($data['name']))))) {

  Same problem is in group/edit.php:

  on line 481. Correct code is here:
  if ($ids = get_records_sql_array('SELECT id FROM {group} WHERE LOWER(TRIM(name)) = ?', array(mb_strtolower(trim($values['name']))))) {

  line 497
  if ($ids = get_records_sql_array('SELECT id FROM {group} WHERE LOWER(TRIM(shortname)) = ?', array(mb_strtolower(trim($values['shortname']))))) {

  
  Regards. Tomas Jakes

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