在PHP中使用时间值聚合两个字符串

Question

after few tries I have failed getting the right result. Situation looks like this:

$morning = '01:05:12';
$evening = '14:05:29';

$sum = gmdate('H:i:s', strtotime($morning) + strtotime($evening));
echo $sum;

It doen't work, sum variable outputs 06:42:25, which if of course not correct. How should I fix this?

Thank you

Answer 1

function strToDuration($str) {
    sscanf($str, '%d:%d:%d', $hours, $minutes, $seconds);
    return $seconds + ($minutes * 60) + ($hours * 60 * 60);
}

function durationToStr($duration) {
    $hours    = floor($duration / (60 * 60));
    $seconds  = $duration % (60 * 60);
    $minutes  = floor($seconds / 60);
    $seconds %= 60;
    return sprintf('%02d:%02d:%02d', $hours, $minutes, $seconds);
}

$morning = '01:05:12';
$evening = '14:05:29';

echo durationToStr(strToDuration($morning) + strToDuration($evening));