PTTL key

Time complexity: O(1)

Like this command returns the remaining time to live of a key that has an expire set, with the sole difference that TTL returns the amount of remaining time in seconds while returns it in milliseconds.

Starting with Redis 2.8 the return value in case of error changed:

Integer reply: TTL in milliseconds, or a negative value in order to signal an error (see the description above).

*Examples

redis> EXPIRE mykey 1

redis> PTTL mykey