PhpStorm comes with many inspections that help us analyze and improve the quality of our codebase. By using PHP Mess Detector (PHPMD), we can enable many additional code quality checks on our codebase: it can detect possible bugs, suboptimal code, unused parameters and so on. In other words: it tells us if our code is worthy of seeing the daylight. PHPMD also contains several rules that check for complexity of code and will tell us if we should rewrite our code into something that is more maintainable. All these checks are integrated nicely in PhpStorm. Let's have a look at some examples!