[FIXED] How do I get the size of a set on Redis?

Issue

For lists I can do the operation:

LLEN KeyName

and it will return the size of a list in Redis. What is the equivalent command for sets? I can't seem to find this in any documentation.

Solution

You are looking for the SCARD command:

SCARD key

Returns the set cardinality (number of elements) of the set stored at

Return value
Integer reply: the cardinality (number of elements) of the set, or 0 if key does not exist.

You can view all of the set commands on the documentation webpage.

Answered By - Tim Cooper

Answer Checked By - Pedro (PHPFixing Volunteer)