Install phpcs using the Moodle Ruleset composer global require moodlehq/moodle-cs https://moodledev.io/general/development/tools/phpcs#installation Go to your moodle instance's root folder. Run grunt ignorefiles nvm use npm ci npx grunt ignorefiles Note: The nvm use and npm ci commands are present just to make sure that things are up-to-date. They are not strictly necessary Run phpcs -vv to check the configuration: Note: Make sure that phpcs is in your path. You can do this by running " export PATH=~/.composer/vendor/bin:$PATH ". phpcs -vv | head Confirm that there was a line for " set config value testVersion " Confirm that the line has the correct supported versions for Moodle Testing the behaviour Copy the attached phpcstest.php and place it into your Moodle directory Run phpcs against it: phpcs phpcstest.php Confirm the expectations: Line Master 401 400 311 Notes 28 YES YES YES YES 5.3 deprecation 31 YES YES YES YES 5.6 deprecation 36 NO NO NO NO 7.0 new feature 41 YES YES YES YES 7.1 deprecation 44 NO NO NO NO 7.1 new feature 49 YES YES YES YES 7.2 deprecation 54 YES YES YES YES 7.3 deprecation 57 NO NO NO NO 7.3 new feature 62 YES YES YES YES 7.4 deprecation 67 NO NO YES YES 7.4 new feature 71 YES YES YES YES 8.0 deprecation 74 NO YES YES YES 8.0 new feature 77 YES YES NO NO 8.1 deprecation 81 YES YES YES YES 8.1 new feature 86 YES NO NO NO 8.2 deprecation 89 YES YES YES YES 8.2 new feature Supported version reference Version Master 401 400 311 7.2 and earlier NO NO NO NO 7.3 NO NO YES YES 7.4 NO YES YES YES 8.0 YES YES YES YES 8.1 YES YES NO NO 8.2 YES NO NO NO 8.3+ YES NO NO NO