mirror of
https://github.com/renbaoshuo/S2OJ.git
synced 2024-11-23 05:18:41 +00:00
88 lines
3.7 KiB
Markdown
88 lines
3.7 KiB
Markdown
PHP Cron Expression Parser
|
|
==========================
|
|
|
|
[](https://packagist.org/packages/dragonmantank/cron-expression) [](https://packagist.org/packages/dragonmantank/cron-expression) [](http://travis-ci.org/dragonmantank/cron-expression) [](https://github.styleci.io/repos/103715337)
|
|
|
|
The PHP cron expression parser can parse a CRON expression, determine if it is
|
|
due to run, calculate the next run date of the expression, and calculate the previous
|
|
run date of the expression. You can calculate dates far into the future or past by
|
|
skipping **n** number of matching dates.
|
|
|
|
The parser can handle increments of ranges (e.g. */12, 2-59/3), intervals (e.g. 0-9),
|
|
lists (e.g. 1,2,3), **W** to find the nearest weekday for a given day of the month, **L** to
|
|
find the last day of the month, **L** to find the last given weekday of a month, and hash
|
|
(#) to find the nth weekday of a given month.
|
|
|
|
More information about this fork can be found in the blog post [here](http://ctankersley.com/2017/10/12/cron-expression-update/). tl;dr - v2.0.0 is a major breaking change, and @dragonmantank can better take care of the project in a separate fork.
|
|
|
|
Installing
|
|
==========
|
|
|
|
Add the dependency to your project:
|
|
|
|
```bash
|
|
composer require dragonmantank/cron-expression
|
|
```
|
|
|
|
Usage
|
|
=====
|
|
```php
|
|
<?php
|
|
|
|
require_once '/vendor/autoload.php';
|
|
|
|
// Works with predefined scheduling definitions
|
|
$cron = new Cron\CronExpression('@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 = new Cron\CronExpression('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 = new Cron\CronExpression('@daily');
|
|
echo $cron->getNextRunDate(null, 2)->format('Y-m-d H:i:s');
|
|
|
|
// Calculate a run date relative to a specific time
|
|
$cron = new Cron\CronExpression('@monthly');
|
|
echo $cron->getNextRunDate('2010-01-12 00:00:00')->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:
|
|
|
|
* * * * *
|
|
- - - - -
|
|
| | | | |
|
|
| | | | |
|
|
| | | | +----- 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`, `@midnight` - Run once a day, midnight - `0 0 * * *`
|
|
* `@hourly` - Run once an hour, first minute - `0 * * * *`
|
|
|
|
Requirements
|
|
============
|
|
|
|
- PHP 7.2+
|
|
- 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](https://github.com/laravel/framework/)
|
|
* Available as a [Symfony Bundle - setono/cron-expression-bundle](https://github.com/Setono/CronExpressionBundle)
|
|
* Framework agnostic, PHP-based job scheduler - [Crunz](https://github.com/lavary/crunz)
|