readme.md

Cron tasks

Introduction

This package contains a simple PHP cron task scheduler that helps you version control your cron jobs.

Requirements

This library package requires PHP 7.0 or later

Installation

Installing via Composer

The recommended way to install crontask is through Composer.

Next, run the Composer command to install the latest version of crontask:

composer require visavi/crontask

After installing, you need to require Composer's autoloader:

require 'vendor/autoload.php';

Once you've created your task list script (see Usage below) open a linux shell add the following line to crontab (crontab -e):

* * * * * php /path/cron.php

Usage

The following example shows how to schedule a HelloDaily task (simple echo example) and a ShellMonday task (running a shell task example).

class HelloDailyTask extends \Crontask\Tasks\Task
{
    public function run()
    {
        $this->setOutput('Hello World');
    }
}

class ShellMondayTask extends \Crontask\Tasks\Shell
{
    protected $command = "echo Hello Monday";
}

$taskList = new \Crontask\TaskList();

// Add task to run at 12:00 every day
$taskList->addTask((new HelloDailyTask)->setExpression('12 0 * * *'));

// Add task to run every hour
$taskList->addTask((new HelloDailyTask)->setExpression('@hourly'));

// Add task to run at 12:00 every Monday
$taskList->addTask((new ShellMondayTask)->setExpression('12 0 * * 1'));

// or
$taskList->addTasks([
    (new HelloDailyTask)->setExpression('12 0 * * 1'),
    (new HelloDailyTask)->setExpression('@hourly'),
    (new ShellMondayTask)->setExpression('12 0 * * 1'),
]);

$taskList->run();

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)

Mappings

@yearly   => 0 0 1 1 *
@annually => 0 0 1 1 *
@monthly  => 0 0 1 * *
@weekly   => 0 0 * * 0
@daily    => 0 0 * * *
@hourly   => 0 * * * *

License

The class is open-sourced software licensed under the MIT license