.. toctree::
:titlesonly:
:hidden:
customize/ordered-time-codec
customize/timestamp-first-comb-codec
customize/calculators
customize/validators
customize/factory
ramsey/uuid offers a variety of ways to modify the standard behavior of the library through dependency injection. Using FeatureSet, UuidFactory, and :php:meth:`Uuid::setFactory() <Ramsey\\Uuid\\Uuid::setFactory()>`, you are able to replace just about any builder, codec, converter, generator, provider, and more.
- Ordered-time Codec
- The ordered-time codec exists to rearrange the bytes of a version 1, time-based UUID so that the timestamp portion of the UUID is monotonically increasing. To learn more, see :ref:`customize.ordered-time-codec`.
- Timestamp-first COMB Codec
- The timestamp-first COMB codec replaces part of a version 4, random UUID with a timestamp, so that the UUID becomes monotonically increasing. To learn more, see :ref:`customize.timestamp-first-comb-codec`.
- Using a Custom Calculator
- It's possible to replace the default calculator ramsey/uuid uses. If your requirements require a different solution for making calculations, see :ref:`customize.calculators`.
- Using a Custom Validator
- If your requirements require a different level of validation or a different UUID format, you may replace the default validator. See :ref:`customize.validators`, to learn more.
- Replace the Default Factory
- Not only are you able to inject alternate builders, codecs, etc. into the factory and use the factory to generate UUIDs, you may also replace the global, static factory used by the static methods on the Uuid class. To find out how, see :ref:`customize.factory`.