README

Framework-agnostic PHP core for Crontinel. Provides monitor contracts, typed data objects, alert management with deduplication, and cron expression helpers.

If you use Laravel, install crontinel/laravel instead. It pulls in this package automatically and adds service providers, dashboard, Artisan commands, and event listeners.

Install crontinel/php directly when you are:

Building an adapter for Symfony, Slim, or another framework
Integrating Crontinel into a vanilla PHP application
Writing a custom monitor that does not depend on Laravel

Requirements

PHP 8.2, 8.3, or 8.4
Composer

Compatibility

Laravel 10, 11, and 12 — install crontinel/laravel instead, which wraps this package and adds Laravel-specific integration.
Horizon — this package reads the same Redis keys that Horizon uses. When you install crontinel/laravel, the HorizonMonitor works out of the box with no additional configuration.
Other frameworks — Symfony, Slim, and any PHP 8.2+ application can use the contracts and data objects directly.

Installation

composer require crontinel/php

What this package provides

Contracts

MonitorInterface -- implement isHealthy(): bool to create a custom monitor
AlertChannelInterface -- implement send(AlertEvent $event): void to deliver alerts via any transport (Slack, email, webhook, etc.)

Data objects

Immutable, readonly value objects used across the stack:

AlertEvent -- key, title, message, level (critical / warning / info / resolved), fired timestamp
CronStatus -- command, expression, status, last run metadata, next due time
HorizonStatus -- Horizon supervisor state
QueueStatus -- queue depth, failed count, oldest job age

Alert management

AlertManager handles fire/resolve lifecycle with built-in deduplication. It accepts any PSR-16 cache and any AlertChannelInterface implementation:

Deduplicates repeated alerts for the same key (default: 5 min TTL)
Auto-sends "resolved" notifications when an issue clears
Logs failures via PSR-3 logger (falls back to NullLogger)

Cron expression helpers

CronExpressionHelper wraps dragonmantank/cron-expression with convenience methods:

nextDue(string $expression) -- next scheduled run as DateTimeImmutable
previousDue(string $expression) -- last scheduled run
isLate(DateTimeInterface $lastRunAt, string $expression, int $graceSeconds = 120) -- whether a job has missed its window

Built-in monitors

Ready-to-use monitor implementations (all implement MonitorInterface):

CronMonitor, HorizonMonitor, QueueMonitor

Usage example

Implement MonitorInterface to build a custom health check:

use Crontinel\Contracts\MonitorInterface;

final class DiskSpaceMonitor implements MonitorInterface
{
    public function __construct(
        private readonly string $path = '/',
        private readonly float $minFreePercent = 10.0,
    ) {}

    public function isHealthy(): bool
    {
        $free = disk_free_space($this->path);
        $total = disk_total_space($this->path);

        return ($free / $total) * 100 >= $this->minFreePercent;
    }
}

Wire up alert delivery by implementing AlertChannelInterface:

use Crontinel\Contracts\AlertChannelInterface;
use Crontinel\Data\AlertEvent;

final class WebhookChannel implements AlertChannelInterface
{
    public function __construct(
        private readonly string $url,
    ) {}

    public function send(AlertEvent $event): void
    {
        file_get_contents($this->url, false, stream_context_create([
            'http' => [
                'method' => 'POST',
                'header' => 'Content-Type: application/json',
                'content' => json_encode([
                    'key'      => $event->key,
                    'title'    => $event->title,
                    'message'  => $event->message,
                    'level'    => $event->level,
                    'resolved' => $event->resolved,
                ]),
            ],
        ]));
    }
}

Then use AlertManager to fire and resolve alerts:

use Crontinel\Alert\AlertManager;

// Requires any PSR-16 cache implementation
$alertManager = new AlertManager(
    cache: $cache,
    channel: new WebhookChannel('https://example.com/webhook'),
);

$monitor = new DiskSpaceMonitor('/data');

if (! $monitor->isHealthy()) {
    $alertManager->fire('disk.data', 'Low disk space', 'Disk /data is below 10% free', 'critical');
} else {
    $alertManager->resolve('disk.data');
}

Using CronExpressionHelper

use Crontinel\Cron\CronExpressionHelper;

$helper = new CronExpressionHelper();

// When is the next run of "every minute"?
$next = $helper->nextDue('* * * * *');
echo $next->format('Y-m-d H:i:s');

// Is a job that's been silent for 10 minutes late for a 5-minute schedule?
$lastRun = new \DateTimeImmutable('2026-04-11 10:50:00');
$isLate = $helper->isLate($lastRun, '*/5 * * * *', graceSeconds: 60);
// Returns true if current time exceeds $lastRun + 5min + 60s grace

Using built-in monitors with AlertManager

use Crontinel\Alert\AlertManager;
use Crontinel\Monitors\QueueMonitor;

$alertManager = new AlertManager(
    cache: $cache,
    channel: new WebhookChannel('https://example.com/alerts'),
);

$queueMonitor = new QueueMonitor(
    redisConnection: 'default',
    maxDepth: 100,
    maxFailed: 10,
);

if (! $queueMonitor->isHealthy()) {
    $status = $queueMonitor->getStatus(); // returns QueueStatus object
    $alertManager->fire(
        'queue.depth',
        'Queue depth exceeded',
        "Queue has {$status->depth} jobs (max: 100)",
        'warning',
    );
}

Ecosystem

Package	Description
crontinel/php (this repo)	Framework-agnostic PHP core
crontinel/laravel	Laravel package with dashboard, Artisan commands, and event listeners
crontinel/mcp-server	MCP server for AI assistants (Claude, Cursor)
docs.crontinel.com	Full documentation
app.crontinel.com	Hosted SaaS dashboard

License

MIT. See LICENSE.

Built by Harun R Rayhan · crontinel.com

crontinel / php

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