PHP | Get number of days

get_num_days.php

<?php 
/**
 * Source: https://stackoverflow.com/questions/2040560/finding-the-number-of-days-between-two-dates
 * Saksham Gupta
 */
function getNumDays($dateStart, $dateEnd) {
    $vDateStart = new DateTime($dateStart);
    $vDateEnd   = new DateTime($dateEnd);
    
    $diff = $vDateEnd->diff($vDateStart)->format("%a");
    return $diff;    
}

$dateStart = '2020-11-10';
$dateEnd   = '2020-11-20';

echo getNumDays($dateStart, $dateEnd) . "\n";