PHP Cron Expression Parser ( Not Official Repository)

This is a fork from dragonmantank/cron-expression with added not standard expression for Seconds. This is mainly used for Fcron scheduling support for seconds.

Installing

Add the dependency to your project:

composer require carlossosa88/cron-expression

Usage

<?php

require_once '/vendor/autoload.php';

// Works with predefined scheduling definitions
$cron = Cron\CronExpression::factory('@daily');
$cron->isDue();
echo $cron->getNextRunDate()->format('Y-m-d H:i:s');
echo $cron->getPreviousRunDate()->format('Y-m-d H:i:s');

// Works with complex expressions
$cron = Cron\CronExpression::factory('3-59/15 6-12 */15 1 2-5');
echo $cron->getNextRunDate()->format('Y-m-d H:i:s');

// Calculate a run date two iterations into the future
$cron = Cron\CronExpression::factory('@daily');
echo $cron->getNextRunDate(null, 2)->format('Y-m-d H:i:s');

// Calculate a run date relative to a specific time
$cron = Cron\CronExpression::factory('@monthly');
echo $cron->getNextRunDate('2010-01-12 00:00:00')->format('Y-m-d H:i:s');

Usage (Seconds)

<?php

// Run a task every 5 seconds
$e = CronExpression::factory('* * * * * */5');
$this->assertTrue(
    $e->isDue(
        new DateTime('2014-04-07 00:00:05'), // Instance of datetime or 'now'
        null, // Time zone
        false // Drop seconds? Drop seconds parameter have to be set to FALSE, otherwise the default behavior is to reset to 0 current seconds 
    )
);

// Run a task on seconds 0,5,10,20
$e = CronExpression::factory('* * * * * 0,5,10,20');
$this->assertSame('2018-04-07 00:00:20',
    $e->getNextRunDate('2018-04-07 00:00:13', 0, false, null, false)
        ->format('Y-m-d H:i:s')
);

CRON Expressions

A CRON expression is a string representing the schedule for a particular command to execute. The parts of a CRON schedule are as follows:

*    *    *    *    *    *
-    -    -    -    -    -
|    |    |    |    |    |
|    |    |    |    |    +- seconds (0 - 59)
|    |    |    |    +------ day of week (0 - 7) (Sunday=0 or 7)
|    |    |    +----------- month (1 - 12)
|    |    +---------------- day of month (1 - 31)
|    +--------------------- hour (0 - 23)
+-------------------------- min (0 - 59)

This library also supports a few macros:

• @yearly, @annually - Run once a year, midnight, Jan. 1 - 0 0 1 1 *
• @monthly - Run once a month, midnight, first of month - 0 0 1 * *
• @weekly - Run once a week, midnight on Sun - 0 0 * * 0
• @daily - Run once a day, midnight - 0 0 * * *
• @hourly - Run once an hour, first minute - 0 * * * *

Requirements

• PHP 7.1+
• PHPUnit is required to run the unit tests
• Composer is required to run the unit tests

Projects that Use cron-expression

• Part of the Laravel Framework
• Available as a Symfony Bundle - setono/cron-expression-bundle