## zRangeByScore, zRevRangeByScore ##### *Description* Returns the elements of the sorted set stored at the specified key which have scores in the range \[start,end\]. Adding a parenthesis before `<span class="calibre12">start</span>` or `<span class="calibre12">end</span>` excludes it from the range. +inf and -inf are also valid limits. zRevRangeByScore returns the same items in reverse order, when the `<span class="calibre12">start</span>` and `<span class="calibre12">end</span>` parameters are swapped. 返回key對應的有序集合中score介于min和max之間的所有元素（包哈score等于min或者max的元素）。元素按照score從低到高的順序排列。如果元素具有相同的score，那么會按照字典順序排列。 可選的選項LIMIT可以用來獲取一定范圍內的匹配元素。如果偏移值較大，有序集合需要在獲得將要返回的元素之前進行遍歷，因此會增加O(N)的時間復雜度。可選的選項WITHSCORES可以使得在返回元素的同時返回元素的score，該選項自從Redis 2.0版本后可用。 ##### *Parameters* *key* *start*: string *end*: string *options*: array Two options are available: `<span class="calibre12">withscores => TRUE</span>`, and `<span class="calibre12">limit => array($offset, $count)</span>` ##### *Return value* *Array* containing the values in specified range. ##### *Example* ``` <pre class="calibre16">$redis->zAdd('key', 0, 'val0'); $redis->zAdd('key', 2, 'val2'); $redis->zAdd('key', 10, 'val10'); $redis->zRangeByScore('key', 0, 3); /* array('val0', 'val2') */ $redis->zRangeByScore('key', 0, 3, array('withscores' => TRUE); /* array('val0' => 0, 'val2' => 2) */ $redis->zRangeByScore('key', 0, 3, array('limit' => array(1, 1)); /* array('val2' => 2) */ $redis->zRangeByScore('key', 0, 3, array('limit' => array(1, 1)); /* array('val2') */ $redis->zRangeByScore('key', 0, 3, array('withscores' => TRUE, 'limit' => array(1, 1)); /* array('val2' => 2) */ ```