How to format an UTC date to use the Z (Zulu) zone designator in php?

Question

I need to display and handle UTC dates in the following format:

2013-06-28T22:15:00Z

As this format is part of the ISO8601 stand

Answer 1

If you are using Carbon then the method is:

echo $dt->toIso8601ZuluString();    
// 2019-02-01T03:45:27Z