[Farcaster]

Yes, you could check for changes on the profile_updateprofile hook and then insert a log into a custom table.

A simplified example of what this might look like:

PHP Code:

$newvalue = $vbulletin->GPC['userfield']['field2']; 
$oldvalue = $vbulletin->userinfo['field2'];

if ($oldvalue <> $newvalue) {

    $db->query_write("
        INSERT INTO profilelog (oldvalue,newvalue) 
        VALUES ('".$db->escape_string($oldvalue)."','".$db->escape_string($newvalue)."')";


}