Change-Id: I73d19cfeed0596b66e16e4c383b3658594c211e3
* @param $exp Integer: (optional) Expiration time. This can be a number of seconds
* to cache for (up to 30 days inclusive). Any timespans of 30 days + 1 second or
* longer must be the timestamp of the time at which the mapping should expire. It
- * is safe to use timestamps in all cases, regardless of exipration
+ * is safe to use timestamps in all cases, regardless of expiration
* eg: strtotime("+3 hour")
*
* @return Boolean