adding two time values of similar formats using php

Question

i have two time values as give below

$time  = 06:58:00;
$time2 = 00:40:00;

I am doing this for calculating the appointments and available

Answer 1

You can try this

$time = "04:00:00";
$time2 = "03:30:00";

$result = date("H:i:s",strtotime($time)+strtotime($time2));
echo $result;

It gives output 07:30:00 but it does not work sometime in different version of operating system. If you want to get sum of time then you can use this code

<?php
   function CalculateTime($time1, $time2) {
      $time1 = date('H:i:s',strtotime($time1));
      $time2 = date('H:i:s',strtotime($time2));
      $times = array($time1, $time2);
      $seconds = 0;
      foreach ($times as $time)
      {
        list($hour,$minute,$second) = explode(':', $time);
        $seconds += $hour*3600;
        $seconds += $minute*60;
        $seconds += $second;
      }
      $hours = floor($seconds/3600);
      $seconds -= $hours*3600;
      $minutes  = floor($seconds/60);
      $seconds -= $minutes*60;
      if($seconds < 9)
      {
      $seconds = "0".$seconds;
      }
      if($minutes < 9)
      {
      $minutes = "0".$minutes;
      }
        if($hours < 9)
      {
      $hours = "0".$hours;
      }
      return "{$hours}:{$minutes}:{$seconds}";
    }

    $time1= '23:32:05';
    $time2 = '01:29';
    echo CalculateTime($time1,$time2);

?>

In the second code, you can send time in hour:minutes or hours:minutes:seconds. This code accept both format because it convert time automatically

Answer 2

Use this function...

 function sum_the_time($time1, $time2) {
      $times = array($time1, $time2);
      $seconds = 0;
      foreach ($times as $time)
      {
        list($hour,$minute,$second) = explode(':', $time);
        $seconds += $hour*3600;
        $seconds += $minute*60;
        $seconds += $second;
      }
      $hours = floor($seconds/3600);
      $seconds -= $hours*3600;
      $minutes  = floor($seconds/60);
      $seconds -= $minutes*60;
      if($seconds < 9)
      {
      $seconds = "0".$seconds;
      }
      if($minutes < 9)
      {
      $minutes = "0".$minutes;
      }
        if($hours < 9)
      {
      $hours = "0".$hours;
      }
      return "{$hours}:{$minutes}:{$seconds}";
    }

Answer 3

If you're build those time strings from a database before, you'd probably want to rebuild them to something like this:

$time = "00:06:58";
$time2 = "40 minutes";

$timestamp = strtotime($time." +".$time2);
$endTime = date("d.m.Y H:i:s", $timestamp);

Answer 4

this code sample would take hour in $time and add the hour in $time2 to it

for example: time=06:58:00, time2=00:40:00, result = 07:38:00

$time = "06:58:00";
$time2 = "00:40:00";

$secs = strtotime($time2)-strtotime("00:00:00");
$result = date("H:i:s",strtotime($time)+$secs);

Answer 5

Anudeep's solution was great for my use case, but I needed to be able to add negative times as well. Here's a slightly edited version of his code to take and return negative time strings ("-01:01:01" for example):

public static function sum_the_times($time1, $time2)
{
    $times = array($time1, $time2);
    $seconds = 0;
    $negative = false;
    foreach ($times as $time) {
        list($hour,$minute,$second) = explode(':', $time);
        if(substr($hour,0,1) == '-'){
            $seconds -= substr($hour,1)*3600;
            $seconds -= $minute*60;
            $seconds -= $second;
        } else {
            $seconds += $hour*3600;
            $seconds += $minute*60;
            $seconds += $second;
        }
    }
    if (substr($seconds, 0, 1) == '-') {
        $negative = true;
        $seconds = ($seconds * -1);
    }
    $hours = floor($seconds/3600);
    $seconds -= $hours*3600;
    $minutes  = floor($seconds/60);
    $seconds -= $minutes*60;
    if ($seconds < 9) {
        $seconds = "0".$seconds;
    }
    if ($minutes < 9) {
        $minutes = "0".$minutes;
    }
    if ($hours < 9) {
        $hours = "0".$hours;
    }
    return ($negative ? "-" : "")."{$hours}:{$minutes}:{$seconds}";
}

Answer 6

strtotime function takes full-date as an argument and valid format are as following: http://www.php.net/manual/en/datetime.formats.php

You can see that in online PHP manual for the function at http://php.net/manual/en/function.strtotime.php