## Feature Description https://github.com/WordPress/performance/pull/730 introduced PhpStan and started with level 0 conformance. Now we can increase the [rule level](https://phpstan.org/user-guide/rule-levels) to further improve the codebase. Once this is resolved, another issue should be created to bump the rule level again. - [x] https://github.com/WordPress/performance/pull/1188 - [x] https://github.com/WordPress/performance/pull/1195 - [x] https://github.com/WordPress/performance/pull/1198 - [x] https://github.com/WordPress/performance/pull/1199 - [x] https://github.com/WordPress/performance/pull/1200 - [x] https://github.com/WordPress/performance/pull/1201 - [x] https://github.com/WordPress/performance/pull/1202 - [x] https://github.com/WordPress/performance/pull/1203 - [x] #1205 - [x] https://github.com/WordPress/performance/pull/1210 - [x] https://github.com/WordPress/performance/pull/1241 - [ ] https://github.com/WordPress/performance/pull/1211 (maybe not) - [x] https://github.com/WordPress/performance/issues/1209
Feature Description
#730 introduced PhpStan and started with level 0 conformance. Now we can increase the rule level to further improve the codebase.
Once this is resolved, another issue should be created to bump the rule level again.