#6 [Insight] Sensio Insight Corrections
* POSIX regex functions should never be used (https://insight.sensiolabs.com/what-we-analyse/php.use_php_ereg_function)
* Absolute path constants __DIR__ and __FILE__ should not be used (https://insight.sensiolabs.com/what-we-analyse/symfony.dependency_injection.use_dir_file_constant)
* Unused use statement should be avoided (https://insight.sensiolabs.com/what-we-analyse/php.unused_use_statement)
* Improve tests