function guid(){if (function_exists('com_create_guid')){return com_create_guid();}else{mt_srand((double)microtime()*10000);//optional for php 4.2.0 and up.$charid = strtoupper(md5(uniqid(rand(), true)));$hyphen = chr(45);// "-"$uuid = chr(123)// "{".substr($charid, 0, 8).$hyphen.substr($charid, 8, 4).$hyphen.substr($charid,12, 4).$hyphen.substr($charid,16, 4).$hyphen.substr($charid,20,12).chr(125);// "}"return $uuid;}}