Coding Standards (PHPCS and PHPMD)

Automated testing doesn’t mean just functionality — code quality and looks are important too! WordPress coding standards are enforced using the popular PHP CodeSniffer tool and code quality is being continuously checked using the PHP Mess Detector rules. The custom rules used by DWS are present in the phpcs.xml.dist and phpmd.xml.dist files in each public project on GitHub.

Basically, this ensures that a few WordPress-specific errors can never occur as long as the tests pass. Here are some examples:

  • All output is ran through an escaping function.

  • All user input is ran through a sanitization function.

  • All translatable strings use the same language domain.

  • All global functions/variables/classes are prefixed properly.

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