What is the correct way to convert timestamp to string?

Question

PHP

This is most likely a very noob question, but I can't find what's wrong.
The docs say that the date function accepts a UNIX timestamp as an integer:

The optional timestamp parameter is an integer Unix timestamp that defaults to the current local time if a timestamp is not given.

Given code:

echo date('Y-m-d h:i:s', 1438369615);
echo date('Y-m-d h:i:s', 1438326415);

returns:
> 2015-07-31 03:06:55
> 2015-07-31 03:06:55
Why are the values ​​the same for different labels? What am I doing wrong?

Answer 1

H, not h.
H - 24format
h - 12 format, still need to deliver ap/pm (a/A)