Simple TimeUUID and UUID library for distributed architecture.
Simple 96bit timeuuid realization that close to in-build PHP timestamp with microseconds. Time precision will not be lost. Correctly sortable by time unlike UUID1(time uuid) However you can't use MicroUuid for historical dates like UUID. So use this within range: 1970-01-01 - 2106-02-07. MicroUuid if fully compatible with 32bit architecture (Intel Atom, Celeron, RaspberryPi etc). Y2038 problem will not affect MicroUuid as well.
Why this so unique: every server and worker of fasts-cgi process has unique SEVER_ID and pid; For the collision in only process should be generated more than 64 MicroUuid within single microsecond. This is not possible even in a cycle without any other logic even if you overclock CPU up to 12Ghz.
It looks like hex string:
5e021ada-a5956-080127f-1cc6 (27 chars), where
- first part is unix timestamp in seconds
- second part is microseconds
- third is sequence and pid (unix process id)
- and last is server id
or :
XgIkWjPAYEAaHQAA - base64 encoded binary (16 chars)
It need only BINARY(12) column to store, correctly sortable (by time with micros) (hex string and base64 presentation are correctly sortable as well)
If you use multiple servers it is highly recommended to add unique SERVER_ID=[0-65535] in /etc/environment
(You could also find useful to add SERVER_ROLE=[PROD|TEST|DEV] as well)
Or just add in config:
MicroUuid::$defaultServer = 12345;
Alternative methods will be used for generating machine dependent server id if you not set it directly.
Simple and correct RFC4122 uuid. Works with any possible variant and 32bit save unlike other popular libs.