Online PHP editor | refs for KdcYk

<?php class MyInterval extends DateInterval { public static function instance(DateInterval $di) { $date = array_filter(array( 'Y' => $di->y, 'M' => $di->m, 'D' => $di->d, )); $time = array_filter(array( 'H' => $di->h, 'M' => $di->i, 'S' => $di->s, )); $specString = 'P'; foreach ($date as $key => $value) { $specString .= $value.$key; } if (count($time) > 0) { $specString .= 'T'; foreach ($time as $key => $value) { $specString .= $value.$key; } } return new static($specString === 'P' ? 'PT0S' : $specString); } } $diff = (new DateTime('yesterday'))->diff(new DateTime('tomorrow')); $myDiff = MyInterval::instance($diff); var_dump($myDiff);