PHP Date Exercises : Count the number of days between current day and birthday

Last update on May 30 2022 11:45:53 (UTC/GMT +8 hours)

PHP date: Exercise-2 with Solution

Create a simple 'birthday countdown' script, the script will count the number of days between current day and birthday.

Sample Solution:

PHP Code:

<?php
$target_days = mktime(0,0,0,12,31,2013);// modify the birth day 12/31/2013
$today = time();
$diff_days = ($target_days - $today);
$days = (int)($diff_days/86400);
print "Days till next birthday: $days days!"."\n";
?>

Sample Output:

Days till next birthday: -1143 days!

Flowchart :

PHP Code Editor:

Have another way to solve this solution? Contribute your code (and comments) through Disqus.

Previous: Write a PHP script which will display the copyright information in the following format. To get current year you can use the date() function.
Next: 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.

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