MongoId
PHP Manual

MongoId::getTimestamp

(PECL mongo >= 1.0.1)

MongoId::getTimestampGets the number of seconds since the epoch that this id was created

Descripción

public int MongoId::getTimestamp ( void )

This returns the same thing as running time() when the id is created.

Parámetros

Esta función no tiene parámetros.

Valores devueltos

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.


MongoId
PHP Manual