PHP Error

Hi! Plugin and idea is greate… but…
Not all php understanding that
explode( get_stylesheet() . '/', $include_file_subpath )[1]

there is error’s …

change please in sources to

$include_file_name = explode( get_stylesheet() . '/', $include_file_subpath );
                        $include_file_name = $include_file_name[1];

like that…