<?php
if (!defined('ABSPATH')) exit;
class CronExpression_HoursField extends CronExpression_AbstractField
{
 public function isSatisfiedBy(DateTime $date, $value)
 {
 return $this->isSatisfied($date->format('H'), $value);
 }
 public function increment(DateTime $date, $invert = false)
 {
 // Change timezone to UTC temporarily. This will
 // allow us to go back or forwards and hour even
 // if DST will be changed between the hours.
 $timezone = $date->getTimezone();
 $date->setTimezone(new DateTimeZone('UTC'));
 if ($invert) {
 $date->modify('-1 hour');
 $date->setTime($date->format('H'), 59);
 } else {
 $date->modify('+1 hour');
 $date->setTime($date->format('H'), 0);
 }
 $date->setTimezone($timezone);
 return $this;
 }
 public function validate($value)
 {
 return (bool) preg_match('/[\*,\/\-0-9]+/', $value);
 }
}
