Date ISO 8601 in URL

Question

We are receiving a ISO 8601 date in a URL from another source that looks like this:

echo $_GET['timestamp'];
result: 2014-11-12T12:20:00.635

Their documentation reads that the format should be YYYY-MM-DDThh:mm:ssTZD

Example: 2014-11-12T12:20:00+01:00

How come our result ends with .635? What does it mean? Or are we interpreting the GET from the URL wrong?

Answer 1

We found out that te last numbers in the timestamp are milliseconds. This solves our question but not our initial problem. The timestamp is used to create a sha token but it seems we are missing the timezone.