====== History Function with AT Parameter ======
New history function to see how a wiki looked at a certain time. The difference between ''REV'' and ''AT'' Parameter are:
  * all datetimes are allowed (>page creation time)
  * it also changes the internal mediafiles to the given datetime
  * all internal links are modified so you can navigate through the wiki without losing the timeinfo

===== How to use =====

add parameter ''at=<datetime>'' to the wiki url.

==== As UNIX Timestamp ====
See [[wp>Unix_time]]
  https://www.dokuwiki.org/date_at?at=1412020375
==== strtotime Format ====
see [[phpfn>strtotime]]
  https://www.dokuwiki.org/date_at?at=2014-09-29 21:54
  https://www.dokuwiki.org/date_at?at=-1 week
===== What doesn't work =====
  * All information related to the metadata.