php Question posted in
Official manual can be found here.

How to calculate the time interval backwards in PHP

I have these PHP codes where I wanted to calculate the time difference between 2 given time.

// This is 2:00 am o'clock 
$time1 = 02:00;

// This is 9 pm o'clock
$time2 = 21:00;

I want to calculated backwards time difference between 2am – 9pm, So the time difference should be 5hrs.

I tried the following but did not get the correct result:

$diff = date('H:i:s a', strtotime($time1)) - date('H:i:s a', strtotime($time2));

echo $diff;
Tags:

2

Answers


  1. 0

    Online Demo: https://onecompiler.com/php/42kbtdbzt

    <?php
// Define the time variables
$time1 = "02:00";
$time2 = "21:00";

// Convert the time strings to DateTime objects
$datetime1 = DateTime::createFromFormat('H:i', $time1);
$datetime2 = DateTime::createFromFormat('H:i', $time2);

// Calculate the difference between the two times
$interval = $datetime1->diff($datetime2);

// Calculate the total minutes of the time difference
$totalMinutes = ($interval->h * 60) + $interval->i;

// Calculate the total minutes in a day
$minutesInDay = 24 * 60;

// Subtract the time difference from 24 hours
$remainingMinutes = $minutesInDay - $totalMinutes;

// Convert the remaining minutes back to hours and minutes
$remainingHours = floor($remainingMinutes / 60);
$remainingMinutes = $remainingMinutes % 60;


// Display the Time difference
echo "Time difference: " . $interval->format('%H hours %I minutes') ."n";

// Display the remaining time
echo "Backwards time difference: " . $remainingHours . " hours " . $remainingMinutes . " minutesn";

?>
    Login or Signup to reply.
  2. 0 
    <?php

$time1 = "21:00"; // 9:00 PM
$time2 = "02:00"; // 2:00 AM

// Convert the time strings to DateTime objects
$datetime1 = DateTime::createFromFormat('H:i', $time1);
$datetime2 = DateTime::createFromFormat('H:i', $time2);

// Calculate the time difference, accounting for crossing midnight
if ($datetime1 > $datetime2) {
    // Case where time2 is on the next day
    $datetime2->modify('+1 day');
}

$interval = $datetime1->diff($datetime2);


echo "Backward Time interval: " . $interval->format('%H hours %I minutes') . "n";

?>
    Login or Signup to reply.
Please signup or login to give your own answer.

Back To Top
Search