## sRandMember ##### *Description* Returns a random element from the set value at Key, without removing it. 取得指定SET容器中的一个随机元素，但不会在SET容器中移除它。 ##### *Parameters* *key* ##### *Return value* *String* value from the set *Bool*`<span class="calibre12">FALSE</span>` if set identified by key is empty or doesn't exist. ##### *Example* ``` <pre class="calibre16">$redis->sAdd('key1' , 'member1'); $redis->sAdd('key1' , 'member2'); $redis->sAdd('key1' , 'member3'); /* 'key1' => {'member3', 'member1', 'member2'}*/ $redis->sRandMember('key1'); /* 'member1', 'key1' => {'member3', 'member1', 'member2'} */ $redis->sRandMember('key1'); /* 'member3', 'key1' => {'member3', 'member1', 'member2'} */ ``` ##