TP之uuid()

function uuid() {

$charid = md5(uniqid(mt_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;

}