PHP_CodeSniffer : PHP_CodeSniffer tokenises PHP, JavaScript and CSS files and detects violations of a defined set of coding standards.
asdf : Extendable version manager with support for Ruby, Node.js, Elixir, Erlang & more
ApiGen : ApiGen is the tool for creating professional API documentation from PHP source code, similar to discontinued phpDocumentor/phpDoc.
Psalm : Psalm is a static analysis tool for finding errors in PHP applications.
This PHP package can convert a webpage to an image or pdf. The conversion is done behind the scenes by Puppeteer which controls a headless version of Google Chrome.