Edit file File name : CronExpression_FieldInterface.php Content :<?php /** * CRON field interface * * @author Michael Dowling <mtdowling@gmail.com> */ interface CronExpression_FieldInterface { /** * Check if the respective value of a DateTime field satisfies a CRON exp * * @param DateTime $date DateTime object to check * @param string $value CRON expression to test against * * @return bool Returns TRUE if satisfied, FALSE otherwise */ public function isSatisfiedBy(DateTime $date, $value); /** * When a CRON expression is not satisfied, this method is used to increment * or decrement a DateTime object by the unit of the cron field * * @param DateTime $date DateTime object to change * @param bool $invert (optional) Set to TRUE to decrement * * @return CronExpression_FieldInterface */ public function increment(DateTime $date, $invert = false); /** * Validates a CRON expression for a given field * * @param string $value CRON expression value to validate * * @return bool Returns TRUE if valid, FALSE otherwise */ public function validate($value); } Save