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<?php
namespace Cron; use DateTime;
/** * CRON field interface */ interface 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 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); }
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