## sInter ##### *Description* Returns the members of a set resulting from the intersection of all the sets held at the specified keys. If just a single key is specified, then this command produces the members of this set. If one of the keys is missing, `<span class="calibre12">FALSE</span>` is returned. 返回指定SETS集合的交集结果。如果只是指定了一个SET集合，那么返回该SET集合。如果在参数中有参数错误，那么则返回FLASE。 ##### *Parameters* key1, key2, keyN: keys identifying the different sets on which we will apply the intersection. 参数列表，代表不同的SET集合。 ##### *Return value* Array, contain the result of the intersection between those keys. If the intersection beteen the different sets is empty, the return value will be empty array. 返回数组，数组中的结果为所有SET集合的交集。如果所涉及到的SET集合没有交集结果，那么将返回一个空数组。 ##### *Examples* ``` <pre class="calibre16">$redis->sAdd('key1', 'val1'); $redis->sAdd('key1', 'val2'); $redis->sAdd('key1', 'val3'); $redis->sAdd('key1', 'val4'); $redis->sAdd('key2', 'val3'); $redis->sAdd('key2', 'val4'); $redis->sAdd('key3', 'val3'); $redis->sAdd('key3', 'val4'); var_dump($redis->sInter('key1', 'key2', 'key3')); ``` Output: ``` <pre class="calibre16">array(2) { [0]=> string(4) "val4" [1]=> string(4) "val3" } ```