PHP Static Analysis

Here are a couple of new tools in addition to previously mentioned PHPStan:

  • Psalm by Vimeo.  The cool thing about this static analyzer is that it supports both PHP 5.6 and PHP 7, unlike PHPStan which requires PHP 7.  (Yeah, I know PHP 5.6 has reached the end of its active support a while back, but there are still quite a few projects around using it.) Additionally, Psalm is easy to control via the XML configuration file,  much like PHPUnit and PHP CodeSniffer.
  • Phan.  This one is a bit trickier to install, as it requires some PHP extensions that I’ve never heard about (like PHP AST).

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