CheckUser is an extension that allows privileged users to check which IP addresses, User-Agent strings, and Client Hints are used by a given username and which usernames are used by a given IP.
For more information, see https://www.mediawiki.org/wiki/Extension:CheckUser
Hard limit: 120 characters (enforced by the linter)
CheckUser's .phpcs.xml sets absoluteLineLimit to 120, making lines over 120 a hard
linter error. An advisory warning is also emitted for lines over 100 characters on
newly added lines (via scripts/phpcs-diff.php, which runs as part of composer test).
Practical rules for code review:
- Lines ≤ 120 chars — fully compliant; do not leave review comments about line length
- Lines > 120 chars — linter will error; must be fixed before merging
Shorter lines are always welcome, but reviewers must not request changes solely based on line length as long as the linter passes.