RedisCluster::SERIALIZER_NONE is gone with v6.0

[boesing]

Expected behaviour

var_dump(RedisCluster::SERIALIZER_NONE); // int(0)

Actual behaviour

PHP Warning:  Uncaught Error: Undefined constant RedisCluster::SERIALIZER_NONE in php shell code:1

I'm seeing this behaviour on

• OS: MacOS
• Redis: ❌
• PHP: 8.2
• phpredis: 6.0

Steps to reproduce, backtrace or example script

var_dump(Redis::SERIALIZER_NONE); // int(0)

I've checked

• There is no similar issue from other users
• Issue isn't fixed in develop branch

[boesing]

In v5 and prior, the constants were available via all implementations.
Is that change intended and do you recommend using Redis::* constants only?

[L00Cyph3r]

It seems that #2259 changed this behaviour. We were surprised by fatal errors after upgrading to v6.0.0.
Was this breaking change forgotten in the release notes, or did I miss something? It would be great if there was a warning and/or upgrade guide for other users.

Quick fix indeed seems to be to use the Redis:: constants if available where currently RedisCluster:: is used. Only a few remain that are cluster-specific (see PR for details of changes).