## zRemRangeByRank, zDeleteRangeByRank ##### *Description* Deletes the elements of the sorted set stored at the specified key which have rank in the range \[start,end\]. 移除key對應的有序集合中rank值介于start和stop之間的所有元素。start和stop均是從0開始的，并且兩者均可以是負值。當索引值為負值時，表明偏移值從有序集合中score值最高的元素開始。例如：-1表示具有最高score的元素，而-2表示具有次高score的元素，以此類推。 ##### *Parameters* *key* *start*: LONG *end*: LONG ##### *Return value* *LONG* The number of values deleted from the sorted set ##### *Example* ``` <pre class="calibre16">$redis->zAdd('key', 1, 'one'); $redis->zAdd('key', 2, 'two'); $redis->zAdd('key', 3, 'three'); $redis->zRemRangeByRank('key', 0, 1); /* 2 */ $redis->zRange('key', 0, -1, array('withscores' => TRUE)); /* array('three' => 3) */ ``` ##