sDiffStore 命令/方法/函数

Performs the same action as sDiff, but stores the result in the first key

与sDiff函数功能一直,只是结果为一个新的SET集合,存储到dstkey。


Parameters

Key: dstkey, the key to store the diff into.

Key:存储结果的SET集合KEY


Keys: key1, key2, ... , keyN: Any number of keys corresponding to sets in redis

参与操作的SET集合


Return value

INTEGER: The cardinality of the resulting set, or FALSE in case of a missing key.

返回整数:为结果集的个数。


Example

$redis->delete('s0', 's1', 's2');


$redis->sAdd('s0', '1');

$redis->sAdd('s0', '2');

$redis->sAdd('s0', '3');

$redis->sAdd('s0', '4');


$redis->sAdd('s1', '1');

$redis->sAdd('s2', '3');


var_dump($redis->sDiffStore('dst', 's0', 's1', 's2'));

var_dump($redis->sMembers('dst'));


Return value: the number of elements of s0 that are neither in s1 nor in s2.

int(2)

array(2) {

  [0]=>

  string(1) "4"

  [1]=>

  string(1) "2"

}