I need a self-hosted issue tracker that
- is written in PHP,
- doesn’t require a database, and
- is free/libre/open source.
An issue can have a category ("bug", "feature request", "support") and a status ("closed", "open", "on hold").
An issue can be commented.
Issues and comments can have image attachments.
Email notifications for new issues and new comments.
The list of issues can be filtered by category and status.
- When referencing issues/comments internally, the links should be relative (or there should be a config option to change the hostname) so that switching domains is hassle-free.