PHP round the time to the nearest 15 seconds

Question

This is not a duplicate question, but involves a little understanding about time.

I need a solution to the following problem I have a number of specifically produced tim

Answer 1

$seconds = ($hr * 60 + $mn) * 60 + $sc; // convert to seconds
$rounded = round($seconds/15)*15;       // round
$sc = $rounded % 60;                    // get seconds
$mn = ($rounded - $sc) / 60 % 60;       // get minutes
$hr = ($rounded - $sc - $mn * 60) / 60; // get hours