// Find the SVN revision number
function findSVNrevision($svn_dir)
{
	// No file, forget it.
	if (!file_exists($svn_dir . '/.svn/entries'))
		return date('Y-m-d_H-i', time());
 
	// Open the file, read it and close it.
	$opened_file = fopen($svn_dir . '/.svn/entries', "r");
	$junk = fread($opened_file, 13);
	fclose($opened_file);
 
	// Pull out the revision
	preg_match("~dir([0-9]*)~mis", str_replace(array("\r", "\n", "\r\n"), '', $junk), $match);
 
	// If it fails.. I guess we get out.
	if (empty($match[0]) || empty($match[1]))
		return date('Y-m-d_H-i', time());
 
	// woohoo!
	return $match[1];
}