How can we calculate a time point plus a long time?

How can we calculate a time point plus a long time? for example, if a video is released at 22:50:00 and the total length of time is 01:40:00, how can we calculate the final end time?

Reply to discussion (solution)

$date = new DateTime('22:50:00');$date->add(new DateInterval('PT01H40M00S'));echo $date->format('H:i:s');

00:30:00

Is this the only way for the moderator? do you need to convert it at 01:40:00?

This works too.

echo date('H:i:s', strtotime('22:50:00') + strtotime('01:40:00') - strtotime('00:00:00'));

00:30:00

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Call to undefined method DateTime: add () does not have this method?

This works too.

echo date('H:i:s', strtotime('22:50:00') + strtotime('01:40:00') - strtotime('00:00:00'));

00:30:00

Eat the chews that others chew
Learn to use tools in your hands

What tools

DateTime: add
(PHP 5> = 5.3.0)

DateTime: add
(PHP 5> = 5.3.0)

It turns out that ..

This works too.

echo date('H:i:s', strtotime('22:50:00') + strtotime('01:40:00') - strtotime('00:00:00'));

00:30:00

Eat the chews that others chew
Learn to use tools in your hands

What tools

Manual !!!