Returns helpful text about the different subcommands.
PUBSUB
HELP
The PUBSUB HELP
command returns a helpful text
describing the different subcommands.
Array reply: a list of sub-commands and their descriptions.
O(1)
@slow
PSUBSCRIBE, PUBLISH, PUBSUB, PUBSUB CHANNELS, PUBSUB NUMPAT, PUBSUB NUMSUB, PUBSUB SHARDCHANNELS, PUBSUB SHARDNUMSUB, PUNSUBSCRIBE, SPUBLISH, SSUBSCRIBE, SUBSCRIBE, SUNSUBSCRIBE, UNSUBSCRIBE.