This patch introduces link anchors on the history page, using the
timestamps (seconds since epoch). It also sets a $CurrentTimestamp
variable which can be used in formats. This allows to change the
RecentChanges pages to create direct links to particular changes, by
adding the following to local/config.php:

$RecentChangesFmt['$SiteGroup.AllRecentChanges'] =
    '* [[$Group.$Name]] ([[$FullName?action=diff#$CurrentTimestamp|diff]])  . . . $CurrentTime $[by] $AuthorLink:  [=$ChangeSummary=]';
$RecentChangesFmt['$Group.RecentChanges'] =
        '* [[$Group/$Name]] ([[$FullName?action=diff#$CurrentTimeTimestamp|diff]])  . . . $CurrentTime $[by] $AuthorLink: [=$ChangeSummary=]';


Note: It might be nice to change $DiffStartFmt to also include a link
to a particular change, to allow easier linking.

Johannes Winkelmann, http://jw.smts.ch

--- scripts/pagerev.php.orig	2006-08-11 07:59:45.000000000 +0200
+++ scripts/pagerev.php	2006-08-11 09:05:56.000000000 +0200
@@ -24,7 +24,7 @@
   <p>$DiffMinorFmt - $DiffSourceFmt</p>
   ");
 SDV($DiffStartFmt,"
-      <div class='diffbox'><div class='difftime'>\$DiffTime 
+      <div class='diffbox'><a name='\$DiffTimestamp'></a><div class='difftime'>\$DiffTime 
         \$[by] <span class='diffauthor' title='\$DiffHost'>\$DiffAuthor</span> - \$DiffChangeSum</div>");
 SDV($DiffDelFmt['a'],"
         <div class='difftype'>\$[Deleted line \$DiffLines:]</div>
@@ -74,6 +74,7 @@
     $diffclass = $match[3];
     if ($diffclass=='minor' && $DiffShow['minor']!='y') continue;
     $diffgmt = $match[1]; $FmtV['$DiffTime'] = strftime($TimeFmt,$diffgmt); 
+    $FmtV['$DiffTimestamp'] = $diffgmt;
     $diffauthor = @$page["author:$diffgmt"]; 
     if (!$diffauthor) @$diffauthor=$page["host:$diffgmt"];
     if (!$diffauthor) $diffauthor="unknown";
--- pmwiki-2.1.12.orig/pmwiki.php	2006-08-05 08:56:36.000000000 +0200
+++ pmwiki-2.1.12/pmwiki.php	2006-08-11 09:08:54.000000000 +0200
@@ -297,6 +297,7 @@
 }
 
 SDV($CurrentTime,strftime($TimeFmt,$Now));
+SDV($CurrentTimestamp,$Now);
 
 if (IsEnabled($EnableStdConfig,1))
   include_once("$FarmD/scripts/stdconfig.php");