Question answered by this recipe
How can I use a separate password for deleting pages?
The deletepage.phpΔ script adds an "?action=delete" which can be used to password-protect the removal of pages from the wiki. In addition, the script disables PmWiki's default page deletion mechanism, although this can be restored.
By default, pages in PmWiki can be deleted by editing the page and changing the contents to the single word "delete" (controlled by the
Note that as with the default page deletion, the pages are not entirely removed from the site's wiki.d/ directory -- the page file is simply renamed to include a timestamp. This is to guard against accidental or malicious page deletions via the PmWiki interface. Deleted pages are not completely removed until a wiki administrator deletes them from the wiki.d directory.
See discussion at DeleteAction-Talk