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


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


--- pmwiki.php.orig	2006-08-15 10:17:52.000000000 +0200
+++ pmwiki.php	2006-08-15 10:21:16.000000000 +0200
@@ -52,6 +52,7 @@
 $Now=time();
 define('READPAGE_CURRENT', $Now+604800);
 $TimeFmt = '%B %d, %Y, at %I:%M %p';
+$TimestampIdPrefix = 'id';
 $MessagesFmt = array();
 $BlockMessageFmt = "<h3 class='wikimessage'>$[This post has been blocked by the administrator]</h3>";
 $EditFields = array('text');
@@ -297,6 +298,7 @@
 }
 
 SDV($CurrentTime,strftime($TimeFmt,$Now));
+SDV($CurrentTimestampId,$TimestampIdPrefix . $Now);
 
 if (IsEnabled($EnableStdConfig,1))
   include_once("$FarmD/scripts/stdconfig.php");
--- scripts/pagerev.php.orig	2006-08-15 10:17:59.000000000 +0200
+++ scripts/pagerev.php	2006-08-15 10:32:07.000000000 +0200
@@ -24,7 +24,7 @@
   <p>$DiffMinorFmt - $DiffSourceFmt</p>
   ");
 SDV($DiffStartFmt,"
-      <div class='diffbox'><div class='difftime'>\$DiffTime 
+      <div class='diffbox'><div class='difftime'><a name='\$DiffTimestampId' href='#\$DiffTimestampId'>#</a> \$DiffTime 
         \$[by] <span class='diffauthor' title='\$DiffHost'>\$DiffAuthor</span> - \$DiffChangeSum</div>");
 SDV($DiffDelFmt['a'],"
         <div class='difftype'>\$[Deleted line \$DiffLines:]</div>
@@ -62,7 +62,8 @@
 
 function PrintDiff($pagename) {
   global $DiffShow,$DiffStartFmt,$TimeFmt,$DiffDelFmt,$DiffAddFmt,
-    $DiffEndDelAddFmt,$DiffEndFmt,$DiffRestoreFmt,$FmtV, $LinkFunctions;
+    $DiffEndDelAddFmt,$DiffEndFmt,$DiffRestoreFmt,$FmtV, $LinkFunctions,
+    $TimestampIdPrefix;
   $page = ReadPage($pagename);
   if (!$page) return;
   krsort($page); reset($page);
@@ -74,6 +75,7 @@
     $diffclass = $match[3];
     if ($diffclass=='minor' && $DiffShow['minor']!='y') continue;
     $diffgmt = $match[1]; $FmtV['$DiffTime'] = strftime($TimeFmt,$diffgmt); 
+    $FmtV['$DiffTimestampId'] = $TimestampIdPrefix . $diffgmt;
     $diffauthor = @$page["author:$diffgmt"]; 
     if (!$diffauthor) @$diffauthor=$page["host:$diffgmt"];
     if (!$diffauthor) $diffauthor="unknown";