How to add hours and minutes to time in php?

The following is really easy way to add days, minutes, hours and seconds to a time using PHP. Using the date function to set the format of the date to be returned then using strtotime to add the increase or decrease of time then after a comma use another strtotime passing in the start date and time.

//set timezone
date_default_timezone_set('GMT');

//set an date and time to work with
$start = '2014-06-01 14:00:00';

//display the converted time
echo date('Y-m-d H:i',strtotime('+1 hour +20 minutes',strtotime($start)));

Times can be entered in a readable way:

• +1 day = adds 1 day
• +1 hour = adds 1 hour
• +10 minutes = adds 10 minutes
• +10 seconds = adds 10 seconds

To sub-tract time its the same except a - is used instead of a +

I have a form that receives a time value:

$selectedTime = $_REQUEST['time'];

The time is in this format - 9:15:00 - which is 9:15am. I then need to add 15 minutes to this and store that in a separate variable but I'm stumped.

I'm trying to use strtotime without success, e.g.:

$endTime = strtotime("+15 minutes",strtotime($selectedTime)));

but that won't parse.

asked Dec 13, 2013 at 0:32

user982124user982124

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3

Your code doesn't work (parse) because you have an extra ) at the end that causes a Parse Error. Count, you have 2 ( and 3 ). It would work fine if you fix that, but strtotime() returns a timestamp, so to get a human readable time use date().

$selectedTime = "9:15:00";
$endTime = strtotime("+15 minutes", strtotime($selectedTime));
echo date('h:i:s', $endTime);

Get an editor that will syntax highlight and show unmatched parentheses, braces, etc.

To just do straight time without any TZ or DST and add 15 minutes (read zerkms comment):

 $endTime = strtotime($selectedTime) + 900;  //900 = 15 min X 60 sec

Still, the ) is the main issue here.

answered Dec 13, 2013 at 0:51

3

Though you can do this through PHP's time functions, let me introduce you to PHP's DateTime class, which along with it's related classes, really should be in any PHP developer's toolkit.

// note this will set to today's current date since you are not specifying it in your passed parameter. This probably doesn't matter if you are just going to add time to it.
$datetime = DateTime::createFromFormat('g:i:s', $selectedTime);
$datetime->modify('+15 minutes');
echo $datetime->format('g:i:s');

Note that if what you are looking to do is basically provide a 12 or 24 hours clock functionality to which you can add/subtract time and don't actually care about the date, so you want to eliminate possible problems around daylights saving times changes an such I would recommend one of the following formats:

!g:i:s 12-hour format without leading zeroes on hour

!G:i:s 12-hour format with leading zeroes

Note the ! item in format. This would set date component to first day in Linux epoch (1-1-1970)

answered Dec 13, 2013 at 0:42

Mike BrantMike Brant

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4

strtotime returns the current timestamp and date is to format timestamp

  $date=strtotime(date("h:i:sa"))+900;//15*60=900 seconds
  $date=date("h:i:sa",$date);

This will add 15 mins to the current time

answered Dec 13, 2018 at 10:24

Nishan BNishan B

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To expand on previous answers, a function to do this could work like this (changing the time and interval formats however you like them according to this for function.date, and this for DateInterval):

(I've also written an alternate form of the below function here.)

// Return adjusted time.

function addMinutesToTime( $time, $plusMinutes ) {

    $time = DateTime::createFromFormat( 'g:i:s', $time );
    $time->add( new DateInterval( 'PT' . ( (integer) $plusMinutes ) . 'M' ) );
    $newTime = $time->format( 'g:i:s' );

    return $newTime;
}

$adjustedTime = addMinutesToTime( '9:15:00', 15 );

echo '<h2>Adjusted Time: ' . $adjustedTime . '</h2>' . PHP_EOL . PHP_EOL;

answered Apr 4, 2017 at 20:21

get After 20min time and date

function add_time($time,$plusMinutes){

   $endTime = strtotime("+{$plusMinutes} minutes", strtotime($time));
   return date('h:i:s', $endTime);
}

20 min ago Date and time

date_default_timezone_set("Asia/Kolkata");
echo add_time(date("Y-m-d h:i:sa"),20);

answered Aug 28, 2021 at 20:22

In one line

$date = date('h:i:s',strtotime("+10 minutes", strtotime($date)));

answered Jun 24 at 1:40

RuydoRuydo

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You can use below code also.It quite simple.

$selectedTime = "9:15:00";
echo date('h:i:s',strtotime($selectedTime . ' +15 minutes'));

answered Oct 11, 2017 at 13:12

Bhavesh PatelBhavesh Patel

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Current date and time

$current_date_time = date('Y-m-d H:i:s');

15 min ago Date and time

$newTime = date("Y-m-d H:i:s",strtotime("+15 minutes", strtotime($current_date)));

DaFois

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answered Jun 7, 2018 at 12:26

Quite easy

$timestring = '09:15:00';
echo date('h:i:s', strtotime($timestring) + (15 * 60));

answered Sep 15, 2020 at 13:28

LightwaxxLightwaxx

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