PhpStorm is WebStorm + PHP so it provides the same utility as WebStorm for JavaScript development. It provides a list of inspections that will validate your code on the fly. It will use a combination of your own preferences + PHP Code Sniffer linter, a config that you can share with the team. It also provides a huge list of static code inspections. It is also possible to find bugs for you way before they even hit a Pull Request. The best tool (“Search Everywhere”) is one of the best tools to navigate your codebase when you do not recall exactly what the class is.