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Informations about the package utility-cron
PHP Cron Library
The PHP Cron Library can be used to get human readable cron expression description and detailed validation messages. Any level of expression complexity is handled.
Code examples
Human readable cron expression description example:
$expression = \Sivaschenko\Utility\Cron\ExpressionFactory::getExpression('5 4 8 * *');
echo $expression->getVerbalString(); // "At 04:05, on 8th day of month."Cron expression validation example:
$expression = \Sivaschenko\Utility\Cron\ExpressionFactory::getExpression('60 * * * 2- *');
if (!$expression->isValid()) {
print_r($expression->getValidationMessages());
}
/*
Array
(
[0] => Minute expression part value "60" is greater than max allowed "59"
[1] => Missing second part of "range" expression ("2-")
)
*/Functionality examples
Examples of expression translation to verbal format:
| Cron Expression | Description |
|---|---|
| * | At every minute. |
| @weekly | On Monday at midnight |
| 5 4 8 | At 04:05, on 8th day of month. |
| FRIL * | At every minute, on last Friday of the month. |
| * 2/2 mon/3 | At every minute, every 2nd month starting from February, every 3rd day of week starting from Monday. |
| 30/5 2-6 ? jan,feb 2#4 2017 | Every 5th minute starting from 30th, every hour from 2nd through 6th, in January and February, every 4th Tuesday, in 2017 |
Examples of cron expression validation:
| Invalid Cron Expression | Validation Messages |
|---|---|
| fd * | Minute expression part value "fd" is not valid! Allowed values are integers from 0 to 59, keywords: "*", "?" |
| 60 2# | Minute expression part value "60" is greater than max allowed "59", Missing second part of "each" expression ("2#") |
| mon/tue * | Second part of expression "mon/tue" can only be integer! |
| 4L * | Day of month expression part value "4L" is not valid! Allowed values are integers from 1 to 31, keywords: "*", "?", "W", "L" Allowed suffixes: "W" |
| @invalid | Unknown shortcut expression "@invalid"! List of valid shortcut expressions: "@reboot", "@midnight", "@daily", "@yearly", "@annually", "@monthly", "@weekly", "@hourly". |
Installation
Add dependency on library to composer.json and update or execute the following command:
composer require sivaschenko/utility-cronBe sure to require composer generated autoload in your project:
require 'vendor/autoload.php';Now see "Code examples" for usage instructions.
Test Coverage
Verbal translation, validation and even exceptions are covered with integration tests.
See \Sivaschenko\Utility\Cron\Test\ExpressionTest for details.
Crafted with ♥ for developers.
