TTL in seconds - fractional seconds support

[mvorisek]

It seems TTL values are typed as integers - https://github.com/phpredis/phpredis/blob/35a7cc09/redis.stub.php#L3066

Since Redis v2.6 the Redis stores all TTL values with milliseconds resolution, so I expect:

• float values for TTL in seconds accepted everywhere (ex: $redis->setEx('key', 30.5, 'value');)
• and for millisecond TTL as well - time is inprecise, and user should be not required to round/cast float values

PHP float type always accepts an int, even with strict types, so no BC break is implied.

Code like:

$redisClient->pSetEx($cacheKey, (int) ($this->getCacheDataTTLSeconds() * 1000), $value);

could be then written as:

$redisClient->pSetEx($cacheKey, $this->getCacheDataTTLSeconds() * 1000, $value);

or even

$redisClient->setEx($cacheKey, $this->getCacheDataTTLSeconds(), $value);

which is shorter and more readable.

[michael-grunder]

It's an interesting question, but I don't really know the right answer.

The issue with code like this:
$redis->setEx('key', 30.5, 'value');

Is that PhpRedis would need to detect the float, redirect to PSETEX (along with a millisecond conversion).

127.0.0.1:6379> setex key 30.5 value
(error) ERR value is not an integer or out of range