- is_uuid
Java
UUID uuid = UUID.fromString(uuidString);
Boolean is_uuid = uuidString.equals(uuid.toString());
PHP
function is_uuid($uuid) {
if(preg_match('/^\{?[A-Z0-9]{8}-[A-Z0-9]{4}-[A-Z0-9]{4}-[A-Z0-9]{4}-[A-Z0-9]{12}\}?$/i', $uuid)) return true;
return false;
}