PHP Class Exercises : Calculate the difference between two dates

Last update on May 30 2022 11:40:44 (UTC/GMT +8 hours)

PHP class: Exercise-5 with Solution

Calculate the difference between two dates using PHP OOP approach.

Sample Dates : 1981-11-03, 2013-09-04

Sample Salution:

PHP Code:

<?php
$sdate = new DateTime("1981-11-03");
$edate = new DateTime("2013-09-04");
$interval = $sdate->diff($edate);
echo "Difference : " . $interval->y . " years, " . $interval->m." months, ".$interval->d." days ";
?>

Sample Output:

Difference : 31 years, 10 months, 1 days

Flowchart :

PHP Code Editor:

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Previous: Write a PHP class that sorts an ordered integer array with the help of sort() function.
Next: Write a PHP calculator class which will accept two values as arguments, then add them, subtract them, multiply them together, or divide them on request.

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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