* Do not use spaces around ``[`` offset accessor and before ``]`` offset accessor;

* Add a ``use`` statement for every class that is not part of the global namespace.

* Add a ``use`` statement for every class that is not part of the global namespace;

* When PHPDoc blocks like `@param` or `@return` include ``null`` and declare multiple

types, place ``null`` always on the last position.

Naming Conventions