date = clone $date; } /** * @param DateTime $after * * @return DateTime|null */ public function next( DateTime $after = NULL ) { $after = empty($after) ? as_get_datetime_object('@0') : $after; return ( $after > $this->date ) ? NULL : clone $this->date; } /** * @return bool */ public function is_recurring() { return false; } /** * For PHP 5.2 compat, since DateTime objects can't be serialized * @return array */ public function __sleep() { $this->timestamp = $this->date->getTimestamp(); return array( 'timestamp', ); } public function __wakeup() { $this->date = as_get_datetime_object($this->timestamp); } }