如何在php中计算日期时间

Question

I would like to make a booking application one field there is date and time for example: long time of booking and reservations

date of booking : 18-12-2013 15:30:00 And long booking : 6 hours

And the result will be 18-12-2013 21:30:00

what if the date of the message and the old order. hours ended up being 0:30. it's already changed the day or date.

date of booking : 18-12-2013 20:30:00 And long booking : 5 hours

And the result will be 18-12-2013 01:30:00

how to implement it in PHP?

sorry i'm still newbie :-)

my php code

$date_booking = $_POST['datebooking'];

$long_time = $_POST['long']; // its contents were 1, 2, 3, 4, and so on

$result = strtotime($date_booking) + $longtime;

Answer 1

Use strtotime() to change your date string into an integer (number of seconds since 1970-01-01 ).

Convert the long booking from hours to seconds (*60*60), then do the addition and use date('Y-m-d H:i:s', $endTime) to convert back to a datetime string.

Note: you will have first to transform your string "DD-MM-YYYY" into "YYYY-MM-DD" to make this works

EDIT with your code:

$date_booking = $_POST['datebooking']; // need to be formatted as "YYYY-MM-DD HH:II:SS" (for example) 
$long_time = $_POST['long']; // its contents were 1, 2, 3, 4, and so on
$long_time_sec = $long_time * 3600; // convert hours to seconds
$result = strtotime($date_booking) + $long_time_sec; 
echo 'end of booking is '.date('Y-m-d H:i:s', $result);