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                             ## zCount



##### *Description*

Returns the *number* of 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.

返回key對應的有序集合中介于min和max間的元素的個數。

##### *Parameters*

*key*
*start*: string
*end*: string

##### *Return value*

*LONG* the size of a corresponding zRangeByScore.

##### *Example*

```
<pre class="calibre9">$redis->zAdd('key', 0, 'val0');
$redis->zAdd('key', 2, 'val2');
$redis->zAdd('key', 10, 'val10');
$redis->zCount('key', 0, 3); /* 2, corresponding to array('val0', 'val2') */
```

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