Serialize data into a compact format that can be unserialized by fb_unserialize()
function fb_serialize( mixed $thing, int $options = 0, ): mixed;
WARNING: FB_SERIALIZE_HACK_ARRAYS_AND_KEYSETS mode has been added in March 2020, and support for underlying serialization format may not yet be available in all non-Hack implementations yet. Caution is adviced when using FB_SERIALIZE_HACK_ARRAYS_AND_KEYSETS for serializing data, which may be deserialized outside of Hack.
mixed $thing- What to serialize. Note that objects are not supported.
int $options = 0
mixed- - Serialized data.