## zInter ##### *Description* Creates an intersection of sorted sets given in second argument. The result of the union will be stored in the sorted set defined by the first argument. The third optionnel argument defines `<span class="calibre12">weights</span>` to apply to the sorted sets in input. In this case, the `<span class="calibre12">weights</span>` will be multiplied by the score of each element in the sorted set before applying the aggregation. The forth argument defines the `<span class="calibre12">AGGREGATE</span>`option which specify how the results of the union are aggregated. 計算numkeys個由keys指定的有序集合的交集，并且將結果存儲在destination中。在該命令中，在你傳遞輸入keys之前，必須提供輸入keys的個數和其它可選的參數。 在默認情況下，一個元素的結果score是具有該元素的所有有序集合的score的和。關于WEIGHTS和AGGREGATE選項，可以參看ZUNIONSTORE命令。如果目標已經存在，那么它將會被重寫。 ##### *Parameters* *keyOutput* *arrayZSetKeys* *arrayWeights* *aggregateFunction* Either "SUM", "MIN", or "MAX": defines the behaviour to use on duplicate entries during the zInter. ##### *Return value* *LONG* The number of values in the new sorted set. ##### *Example* ``` <pre class="calibre16">$redis->delete('k1'); $redis->delete('k2'); $redis->delete('k3'); $redis->delete('ko1'); $redis->delete('ko2'); $redis->delete('ko3'); $redis->delete('ko4'); $redis->zAdd('k1', 0, 'val0'); $redis->zAdd('k1', 1, 'val1'); $redis->zAdd('k1', 3, 'val3'); $redis->zAdd('k2', 2, 'val1'); $redis->zAdd('k2', 3, 'val3'); $redis->zInter('ko1', array('k1', 'k2')); /* 2, 'ko1' => array('val1', 'val3') */ $redis->zInter('ko2', array('k1', 'k2'), array(1, 1)); /* 2, 'ko2' => array('val1', 'val3') */ /* Weighted zInter */ $redis->zInter('ko3', array('k1', 'k2'), array(1, 5), 'min'); /* 2, 'ko3' => array('val1', 'val3') */ $redis->zInter('ko4', array('k1', 'k2'), array(1, 5), 'max'); /* 2, 'ko4' => array('val3', 'val1') */ ```