Online PHP editor | refs for qegiF

<?php class MyDateTime extends \DateTime { public function add(\DateInterval $interval) { $oldDay = (int)$this->format('d'); $this->setDate((int)$this->format('Y'), (int)$this->format('m'), 1); parent::add($interval); $maxDay = (int)$this->format('t'); if($oldDay > $maxDay){ $this->setDate((int)$this->format('Y'), (int)$this->format('m'), $maxDay); } else { $this->setDate((int)$this->format('Y'), (int)$this->format('m'), $oldDay); } return $this; } public function sub(\DateInterval $interval) { $oldDay = (int)$this->format('d'); $this->setDate((int)$this->format('Y'), (int)$this->format('m'), 1); parent::sub($interval); $maxDay = (int)$this->format('t'); if($oldDay > $maxDay){ $this->setDate((int)$this->format('Y'), (int)$this->format('m'), $maxDay); } else { $this->setDate((int)$this->format('Y'), (int)$this->format('m'), $oldDay); } return $this; } } $myDateTime = new MyDateTime('30th November 2012'); $interval = new \DateInterval('P3M'); var_dump($myDateTime->add($interval));