EditThisPagePHP is a tool for collaborative editing online. Pages can be made editable by authorized users, or anyone with something to contribute. Every version of a page is retained, so content is never lost.

EditThisPagePHP combines features of:

Blogs: optional user comments, sending and receiving trackbacks, and RSS feeds,
Wikis: an edit-this-page button, page history, page diffs, and it can email users when pages change,
Content Management Systems: multiple roles (by default a reader, an editor, and a super-editor), each with different privileges.

Originally created for management of a single page, EditTHisPagePHP has been extended so that multiple pages can be managed from a single configuration file. You can copy a page from the administration panel, and the new page will use the same configuration as the original.