The Moodle Coding Style (MCS) states:

Function names should be simple English lowercase words, and start with the[ Frankenstyle|https://moodledev.io/general/development/policies/codingstyle/frankenstyle] prefix and plugin name to avoid conflicts between plugins. Words should be separated by underscores.

PSR-12 states:

Method names MUST be declared in camelCase().

Required decision: Keep the MCS naming convention or adopt the PSR-12 recommendation?

Possibly a first pass would be to keep the Frankenstyle prefix as it’s required in many places?

MCS: https://moodledev.io/general/development/policies/codingstyle#functions-and-methods 

PSR-1: https://www.php-fig.org/psr/psr-1/#43-methods