Menambah dan Mengurangi Waktu di PHP

Berikut ini cara menambahkan waktu dengan satuan yang berbeda dengan menggunakan fungsi date() dan strtotime() kita bisa dengan mudah mengurangi maupun menambakan waktu.

Add days to datetime.
Add hours to datetime.
Add minutes to datetime.
Add seconds to datetime.

$startTime = date("Y-m-d H:i:s");

//display the starting time
echo 'Starting Time: '.$startTime;

//add 1 hour to time
$cenvertedTime = date('Y-m-d H:i:s',strtotime('+1 hour',strtotime($startTime)));

//display the converted time
echo 'Converted Time (added 1 hour): '.$cenvertedTime;

//add 1 hour and 30 minutes to time
$cenvertedTime = date('Y-m-d H:i:s',strtotime('+1 hour +30 minutes',strtotime($startTime)));

//display the converted time
echo 'Converted Time (added 1 hour & 30 minutes): '.$cenvertedTime;
//add 1 hour, 30 minutes and 45 seconds to time
$cenvertedTime = date('Y-m-d H:i:s',strtotime('+1 hour +30 minutes +45 seconds',strtotime($startTime)));

//display the converted time
echo 'Converted Time (added 1 hour, 30 minutes & 45 seconds): '.$cenvertedTime;

//add 1 day, 1 hour, 30 minutes and 45 seconds to time
$cenvertedTime = date('Y-m-d H:i:s',strtotime('+1 day +1 hour +30 minutes +45 seconds',strtotime($startTime)));

//display the converted time
echo 'Converted Time (added 1 day, 1 hour, 30 minutes & 45 seconds): '.$cenvertedTime;