Fills in a whole hash. Non-string values are converted to string, using the standard (string) cast. NULL values are stored as empty strings.
批量填充HASH表。不是字符串类型的VALUE，自动转换成字符串类型。使用标准的值。NULL值将被储存为一个空的字符串。
Parameters
key
members: key → value array
Return value
BOOL
Examples
$redis->delete('user:1');
$redis->hMset('user:1', array('name' => 'Joe', 'salary' => 2000));
$redis->hIncrBy('user:1', 'salary', 100); // Joe earns 100 more now.
