There is one problem/bug in script, i have set our forums threads to be visible only for current month to all guests and members.
but the script goes on calculating number of pages on all forums ?

Fatal error: Maximum execution time of 60 seconds exceeded in /home2/gamers/public_html/vbsitemap-multi.php on line 422

uh, i have a large site with more then 11,00,000 threads :(

add this to the top of the script: @set_time_limit(30000);
do NOT change your php.ini

Everything went so smooth
I submit the XML file to google sitemap via my account.

For the Sitemap.xml file I got an error:

Invalid date

Here is the explaination for the error.

Your Sitemap contains one or more invalid dates. This could be because a date is in the incorrect format, or the date itself is not valid. Dates must use ISO 8601 encoding, although you can omit the time portion. For instance, the following are both valid:

2005-02-21
2005-02-21T18:00:15+00:00
Dates that are in the correct format may be invalid if they specify a future date or specify a date that does not exist (for instance 2005-15-40).

Below is how it shows date at the xml file:
<lastmod>2005-09-05T02:21:43</lastmod>

I'm getting this too on all of mine...

there aren't any time checks currently and theres quite a few times circumstances where the time doesn't display right.

I got rid of it. This thing messed up my vb.

Please fix -_-

How does the above policy work? Google in general does a deep crawl irregularly - ie monthly, and then the threads are available until they are removed/changed when Google gets a no permission error.

Google also does not even download the sitemap daily, and once spidered, takes a day or so for them to appear on Google, and a few days to start ranking high, especially for more competitive phrases.

I like Google to have the max threads possible, so I can get the max traffic possible when each thread is optimized. One month is not long enough for even Google PR to be assigned.

So despite the above, how would you want the site map generated? For monthly use, you would probably want only the previous two weeks site mapped. Please specify and I will program in. The archive version of the url's would also need the calculation done.

On the face of it, the date is correct per the Google examples.

So all I can consider is that the date is a future date, and should have the +00:00 number of hours set.

I will make sure that all last mod dates have the gmt set.

Google requires it in the root, however, there is a workaround that will be in the next release. All sitemap fiels will be in their own directory, and separate from the sitemap php files.

[QUOTE=libertate]I also had the double appending problem with the domain name. www.site.comwww.site.com within the XML files.[quote]

If you don't do the setup correct, the url's are wrong. But all it needs is a browse at the xml file, and the setup corrected.

Most variables are as per the config, only username/password and ping are required on the html entrance page.

The default in the config is $http="http://"; Take the risk and change it and see what happens as above.

The exact format is customisable in the config. Please let me know your exact problem - the above is the correct default format, and you can change it for your specific instance.