PHP Date Exercises : Calculate weeks between two dates
PHP date: Exercise-19 with Solution
Write a PHP script to calculate weeks between two dates.
Sample Solution:
PHP Code:
<?php
function week_between_two_dates($date1, $date2)
{
$first = DateTime::createFromFormat('m/d/Y', $date1);
$second = DateTime::createFromFormat('m/d/Y', $date2);
if($date1 > $date2) return week_between_two_dates($date2, $date1);
return floor($first->diff($second)->days/7);
}
$dt1 = '1/1/2014';
$dt2 = '12/31/2014';
echo 'Weeks between '.$dt1.' and '. $dt2. ' is '. week_between_two_dates($dt1, $dt2)."\n";
?>
Sample Output:
Weeks between 1/1/2014 and 12/31/2014 is 52
Flowchart :
PHP Code Editor:
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Previous: Write a PHP script to calculate the current age of a person.
Next: Write a PHP script to get the number of the month before the current month.
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PHP: Tips of the Day
How to Sort Multi-dimensional Array by Value?
Try a usort, If you are still on PHP 5.2 or earlier, you'll have to define a sorting function first:
Example:
function sortByOrder($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
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