sUnion
Description
Performs the union between N sets and returns it.
执行一个并集操作在N个SET容器之间,并返回结果。
Parameters
Keys: key1, key2, ... , keyN: Any number of keys corresponding to sets in redis.
Return value
Array of strings: The union of all these sets.
返回一个数组
Example
$redis->delete('s0', 's1', 's2'); $redis->sAdd('s0', '1'); $redis->sAdd('s0', '2'); $redis->sAdd('s1', '3'); $redis->sAdd('s1', '1'); $redis->sAdd('s2', '3'); $redis->sAdd('s2', '4'); var_dump($redis->sUnion('s0', 's1', 's2'));
Return value: all elements that are either in s0 or in s1 or in s2.
array(4) { [0]=> string(1) "3" [1]=> string(1) "4" [2]=> string(1) "1" [3]=> string(1) "2" }