As you write your PHP code, you'll need to verify that everything is working as expected and that the code follows all style and formatting requirements. In this list from the SitePoint PHP blog they give you a list of eight tools you can use to ensure all of these criteria are met.
For shipping quality code, we must have testing in mind while coding (if not doing TDD). However, with the wide range of PHP testing tools out there, it’s hard to make a choice! Exploring PHP is a fun adventure (premium course on that here!) but it’s hard to assemble a toolbelt that’s not too heavy to wear to work!
This popular article will highlight the most popular testing tools and has been updated to reflect the state of QA tools in 2017.
Included in their list are tools like:
The post ends with a brief look at continuous integration and how they can help execute these tools automatically when code changes or before production builds are deployed, taking most of the burden off of developers to remember.