function uuidgen(){
#xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx
$y = Array('8','9','a','b');
$uuid = md5(uniqid(mt_rand(),true));
$uuid = substr($uuid,0,8)."-".substr($uuid,8,4)."-".substr($uuid,12,4)."-".substr($uuid,16,4)."-".substr($uuid,20,12);
$uuid[14] = 4;
$uuid[19] = $y[rand(0,3)];
return $uuid;
}
8e7363e6-1222-4945-a3c2-b79c5e0cab39