Questions about converting seconds to hours

Ask the question of converting seconds to hours & lt ;? Phpechogmstrftime ('% H: % M: % s', 108000 );? & Gt; in this way, we get 06:00:00, which means 30 hours, but this is correct, that is, 20 hours & lt ;? Phpechogmstrftime ('% H: % M: % s', 72000 );? & Gt; questions about converting seconds to hours in blue

The result is 06:00:00, which means 30 hours, but this is correct, that is, 20 hours.


In blue, the administrator replied:
"
Gmstrftime returns a Greenwich Mean Time.
The first is 30 hours. after 24 hours a day is removed, it is 6 hours.
The second is 20 hours, within a day, so it is correct.
This function is not used to convert seconds to hours. within 24 hours, you can barely

"


Finally, how can I convert it to a time of less than 30 hours? For example, if I have 1080000 seconds, how can I get 30: 00: 00? thank you.

------ Solution --------------------
Can it be changed?
$ T = 108000;
Echo floor ($ t/3600). gmstrftime (': % M: % s', $ t); // 30: 00: 00