## 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集合的交集結果。如果只是指定了一個SET集合，那么返回該SET集合。如果在參數中有參數錯誤，那么則返回FLASE。 ##### *Parameters* key1, key2, keyN: keys identifying the different sets on which we will apply the intersection. 參數列表，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. 返回數組，數組中的結果為所有SET集合的交集。如果所涉及到的SET集合沒有交集結果，那么將返回一個空數組。 ##### *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" } ```