Scheduler
                                
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                        PHP Simple Scheduler - set occurrence expressions and get next x execution dates [Cron, Crontab, Task Scheduler]
jupitern/scheduler
PHP Scheduler.
add one time event dates or recurring event dates get next event date or next X event dates from a given date
Requirements
PHP 5.4 or higher.
Installation
Include jupitern/scheduler in your project, by adding it to your composer.json file.
{
    "require": {
        "jupitern/scheduler": "1.*"
    }
}
Usage
// instance Scheduler
$schedules = \Jupitern\Scheduler\Scheduler::instance()
// limit events from 08.00 am to 17.00
->setTimeFrame('08:00', '17:00')
// add a one time event date
// accepts any string compatible with php DateTime object
->add('2020-01-01 12:35')
// add another one time event date
// accepts any string compatible with php DateTime object
->add('2020-01-01 17:50')
// add a recurring date
// accepts any string compatible with php DateTime object
->addRecurring('+ 8 hours')
// get next schedule starting at 2020-01-01
->getNextSchedule('2020-01-01 00:00:00', 10);
// get next 5 schedules starting at 2020-01-01
->getNextSchedules('2020-01-01 00:00:00', 10);
// display schedules
foreach ($schedules as $schedule) {
    echo $schedule->format('Y-m-d H:i')."<br/>";
}
Examples
$schedules = \Jupitern\Scheduler\Scheduler::instance()
    ->add('2030-01-01 12:35')
    ->add('2030-01-01 14:50')
    ->addRecurring('+2 hours')
    ->getNextSchedules('2030-01-01 00:00:00', 10);
foreach ($schedules as $schedule) {
    echo $schedule->format('Y-m-d H:i').'<br/>';
}
/*
output:
2030-01-01 00:00
2030-01-01 02:00
2030-01-01 04:00
2030-01-01 06:00
2030-01-01 08:00
2030-01-01 10:00
2030-01-01 12:00
2030-01-01 12:35
2030-01-01 14:00
2030-01-01 14:50
*/
$schedules = \Jupitern\Scheduler\Scheduler::instance()
    ->setTimeFrame('08:00', '17:00')
    ->add('2030-01-01 12:35')
    ->add('2030-01-01 14:50')
    ->addRecurring('+2 hours')
    ->getNextSchedules('2030-01-01 00:00:00', 10);
foreach ($schedules as $schedule) {
    echo $schedule->format('Y-m-d H:i').'<br/>';
}
/*
output:
2030-01-01 08:00
2030-01-01 10:00
2030-01-01 12:00
2030-01-01 12:35
2030-01-01 14:00
2030-01-01 14:50
2030-01-01 16:00
2030-01-02 08:00
2030-01-02 10:00
2030-01-02 12:00
*/
$schedules = \Jupitern\Scheduler\Scheduler::instance()
    ->setTimeFrame('08:30', '19:00')
    ->add('+10 minutes')
    ->add('+30 minutes')	// outside time frame. will not produce any schedule
    ->add('next day 08:30')
    ->getNextSchedules('2000-12-16 18:40');
foreach ($schedules as $schedule) {
    echo $schedule->format('Y-m-d H:i')."<br/>";
}
/*
output:
2000-12-16 18:50
2000-12-17 08:30
*/
ChangeLog
v1.3
- Changed method add to allow relative one time events like "+1 hour" or "next day 17:00"
- relative events added with method add() are relative to $fromStartDate and obey time frame if set
Contributing
- welcome to discuss a bugs, features and ideas.
License
jupitern/scheduler is release under the MIT license.
You are free to use, modify and distribute this software

