I'm getting a result I'm not expecting from gmdate()
<?php
$secs = 175707;
echo gmdate("H:i:s", $secs); // result: 00:48:27
?>
The result is 00:48:27, which is way off. It appears the hours is getting pushed down a position. Am I suspecting that right?
gmdate works on dates, not periods of time. In other words, your timestamp is being interpreted as a point in time early in January 3rd of 1970 (specifically 00:00:00 1 Jan 1970 + 15707 seconds = 00:48:27 3 Jan 1970). This is where your 00:48:27 comes from.
gmdate (and date) are not meant to be used this way. If you just want to calculate hours/minutes/seconds based on number of seconds, calculate them directly:
$seconds = 175707;
$hours = floor($seconds / 3600);
$seconds -= $hours * 3600;
$minutes = floor($seconds / 60);
$seconds -= $minutes * 60;
echo "$hours:$minutes:$seconds"; //48:48:27
Make note that this does not work with civil days. This is because of daylight saving time. A day is not always 24 hours. Sometimes it's 23, and sometimes its 25 when DST is coming into effect or ending. With days as a unit of measure (i.e. a day is always 24 hours), this does work. As an example, 10 March is 23 hours and 3 Nov is 25 hours in the United States. If you are happy with static 24 hours days, then the same approach will of course work.
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