(PECL mongo >= 1.0.1)
MongoId::getTimestamp — Gets the number of seconds since the epoch that this id was created
This returns the same thing as running time() when the id is created.
У этой функции нет параметров.
Returns the number of seconds since the epoch that this id was created. There are only four bytes of timestamp stored, so MongoDate is a better choice for storing exact or wide-ranging times.