- Wrtie unit tests ( see example in https://github.com/ramsey/array_column/tree/master/tests and https://github.com/ramsey/array_column/blob/master/phpunit.xml.dist )
- Setup Travis ( see https://github.com/ramsey/array_column )
- Optionally add a CHANGELOG.md file
- Look for / write a very elegant wrapper for array_multisort() using some of the code snippet in the comments section for http://php.net/manual/en/function.array-multisort.php as inspiration.