Igbinary is a drop in replacement for the standard php serializer. Instead of
time and space consuming textual representation, igbinary stores php data
structures in a compact binary form. Savings are significant when using
memcached or similar memory based storages for serialized data.
* Eliminate impossible/redundant checks.
* Add a new type code for serialization and unserialization of PHP strings that are larger than 4GB.
* Add additional checks for overflow when serializing extremely large data structures.
(e.g. serializing more than 2**32 strings or 2**32 objects/references/arrays)
* Support serializing and unserializing php 8.1 enums (can only be unserialized in php 8.1+)