(mongodb >=1.2.0)
MongoDB\BSON\ObjectID::getTimestamp — Returns the timestamp component of this ObjectID
The timestamp component of an ObjectID is its first four bytes, which denote the number of seconds since the Unix epoch. This value is read as an unsigned 32-bit integer with big-endian byte order.
此函数没有参数。
Returns the timestamp component of this ObjectID.
Example #1 MongoDB\BSON\ObjectID::getTimestamp() example
<?php
var_dump((new MongoDB\BSON\ObjectId())->getTimestamp());
var_dump((new MongoDB\BSON\ObjectId('0000002a0000000000000000'))->getTimestamp());
?>
以上例程的输出类似于:
integer(1484854719) integer(42)