Mastering PHP Code Quality: The Ultimate Guide to PHPStan, Psalm, and CodeSniffer
·1671 words·8 mins
Introduction # It’s 3:00 AM. Your pager (or Slack) is screaming. A TypeError just brought down the checkout process in production. The cause? A variable that everyone assumed was an instance of User was actually null, slipping past your unit tests because that specific edge case wasn’t mocked.