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cron-expression
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FieldInterface.php
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<?php declare(strict_types=1); namespace Cron; use DateTimeInterface; /** * CRON field interface. */ interface FieldInterface { /** * Check if the respective value of a DateTime field satisfies a CRON exp. * * @param DateTimeInterface $date DateTime object to check * @param string $value CRON expression to test against * * @return bool Returns TRUE if satisfied, FALSE otherwise */ public function isSatisfiedBy(DateTimeInterface $date, $value): bool; /** * 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 DateTimeInterface $date DateTime object to change * @param bool $invert (optional) Set to TRUE to decrement * @param string|null $parts (optional) Set parts to use * * @return FieldInterface */ public function increment(DateTimeInterface &$date, $invert = false, $parts = null): FieldInterface; /** * 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(string $value): bool; }