README

Event-driven metrics collection for InstructorPHP.

Use it to:

• collect metrics from event listeners
• store them in a registry
• export them to logs or custom backends

Example

<?php

use Cognesy\Events\Dispatchers\EventDispatcher;
use Cognesy\Metrics\Data\Tags;
use Cognesy\Metrics\Exporters\CallbackExporter;
use Cognesy\Metrics\Metrics;

$metrics = (new Metrics(new EventDispatcher()))
    ->exportTo(new CallbackExporter(function (iterable $items): void {
        foreach ($items as $metric) {
            // send metric to your backend
        }
    }));

$metrics->registry()->counter('requests_total', Tags::of(['route' => '/health']));
$metrics->export();

Documentation

• packages/metrics/CHEATSHEET.md
• packages/metrics/src/