php - What are "MySource" and "Squiz" Coding Standards?

Solution:

Squiz Labs is (or was?) the group behind PHP CS. You can see that in the repo URL: https://github.com/squizlabs/PHP_CodeSniffer

From the ruleset definition:

The MySource coding standard builds on the Squiz coding standard. Currently used for MySource Mini development.

Solution:

The Squiz coding standard has a lot of useful sniffs in there, and they are used by some of the other included standards. The MySource standard is old and not useful, is deprecated, and already removed in the 4.0 branch.