在php中添加两个时间值

Question

    $test=strtotime("06:30:00")+strtotime("03:00:00");

    echo gmdate("H:i:s", $test);

This gives the wrong answer ( 23:01:44 ).

    $test=strtotime("06:30:00")-strtotime("03:00:00");

    echo gmdate("H:i:s", $test);

while subtracting same code gives me the right answer( 03:30:00 ).

Answer 1

You should do this:

<?
echo date("H:i:s", strtotime("06:30:00 + 3 hour"));
echo date("H:i:s", strtotime("06:30:00 - 3 hour"));
?>