PHP Date Exercises : Calculate the difference between two dates (in years, months, days)

Last update on May 30 2022 11:50:31 (UTC/GMT +8 hours)

PHP date: Exercise-4 with Solution

Write a PHP script to calculate the difference between two dates.

Sample dates : 1981-11-04, 2013-09-04

Sample Solution:

PHP Code:

<?php
$sdate = "1981-11-04";
$edate = "2013-09-04";

$date_diff = abs(strtotime($edate) - strtotime($sdate));

$years = floor($date_diff / (365*60*60*24));
$months = floor(($date_diff - $years * 365*60*60*24) / (30*60*60*24));
$days = floor(($date_diff - $years * 365*60*60*24 - $months*30*60*60*24)/ (60*60*24));

printf("%d years, %d months, %d days", $years, $months, $days);
printf("\n");
?>

Sample Output:

31 years, 10 months, 12 days

Flowchart :

PHP Code Editor:

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Previous: Write a PHP script to print the current date in the following format. To get current date's information you can use the date() function.
Next: Write a PHP script to convert a date from yyyy-mm-dd to dd-mm-yyyy.

What is the difficulty level of this exercise?

Test your Programming skills with w3resource's quiz.

PHP: Tips of the Day

How to Sort Multi-dimensional Array by Value?

Try a usort, If you are still on PHP 5.2 or earlier, you'll have to define a sorting function first:

Example:

function sortByOrder($a, $b) {
    return $a['order'] - $b['order'];
}

usort($myArray, 'sortByOrder');

Starting in PHP 5.3, you can use an anonymous function:

usort($myArray, function($a, $b) {
    return $a['order'] - $b['order'];
});

And finally with PHP 7 you can use the spaceship operator:

usort($myArray, function($a, $b) {
    return $a['order'] <=> $b['order'];
});

To extend this to multi-dimensional sorting, reference the second/third sorting elements if the first is zero - best explained below. You can also use this for sorting on sub-elements.

usort($myArray, function($a, $b) {
    $retval = $a['order'] <=> $b['order'];
    if ($retval == 0) {
        $retval = $a['suborder'] <=> $b['suborder'];
        if ($retval == 0) {
            $retval = $a['details']['subsuborder'] <=> $b['details']['subsuborder'];
        }
    }
    return $retval;
});

If you need to retain key associations, use uasort() - see comparison of array sorting functions in the manual

Ref : https://bit.ly/3i77vCC