Undefined index: utf8mb3

[williamdes]

Describe the bug

Notice: Undefined index: utf8mb3
#2 ./libraries/classes/Charsets.php(18): callControllerForRoute
#1 ./libraries/classes/Charsets.php(186): index
#0 ./libraries/classes/Charsets.php(163): getServerCharset

To Reproduce

No idea

Expected behavior

No php notice

Server configuration

• Database version: ?
• phpMyAdmin version: 5.1

Additional context

Reported many times and affects quite a bunch of users (at least 5).

[williamdes]

For members having access to our Sentry back-end, error: PHPMYADMIN-1G

[williamdes]

Param	Value
Error Type	Notice
Error Message	Undefined index: utf8mb3
Exception Type	php
phpMyAdmin version	5.0.0
Incident count	11
Link	Report#70614

This comment is posted automatically by phpMyAdmin's error-reporting-server.

[williamdes]

Found on the error reporting server for phpMyAdmin versions: 5.0, 5.1, 5.2.0-dev (so one of the users is a tester)
Nothing installation specific. Would be glad to know the DBMS the users have

[williamdes]

Found it on StackOverflow: https://stackoverflow.com/q/67421885/5155484

Will try to reproduce and fix this issue

[williamdes]

On a MySQL 8, run SET GLOBAL character_set_server = 'utf8';
The warning Warning: #3719 'utf8' is currently an alias for the character set UTF8MB3, but will be an alias for UTF8MB4 in a future release. Please consider using UTF8MB4 in order to be unambiguous. will be printed
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