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https://github.com/danog/better-prometheus

A better Prometheus library for PHP applications.
https://github.com/danog/better-prometheus

prometheus prometheus-exporter prometheus-metrics

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A better Prometheus library for PHP applications.

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# better-prometheus

[![Psalm coverage](https://shepherd.dev/github/danog/better-prometheus/coverage.svg)](https://shepherd.dev/github/danog/better-prometheus)
[![Psalm level 1](https://shepherd.dev/github/danog/better-prometheus/level.svg)](https://shepherd.dev/github/danog/better-prometheus)
![License](https://img.shields.io/github/license/danog/better-prometheus?v)

A better Prometheus library for PHP applications.

Offers a modern, clean PHP 8.1 API, with support for **default label values**, based on and compatible with the original `promphp/prometheus_client_php` library.

## Installation

```bash
composer require danog/better-prometheus
```

## Usage

```php
values, not just keys.
$counter = $registry->getOrRegisterCounter(
'test',
'some_counter',
'it increases',
// Note: these are default label key+values, they will be sent verbatim, no changes
['someLabel' => 'defaultValue']
);

// Specify some additional labels post-construction like this (both keys and values)...
$counter->incBy(3, ['type' => 'blue']);

// ...or add some more default labels to the counter, creating a new counter:
$newCounter = $counter->addLabels(['someOtherLabel' => 'someOtherDefaultValue']);
assert($newCounter !== $counter); // true
$newCounter->incBy(3, ['type' => 'blue']);

// Gauges can also be used
$gauge = $registry->getOrRegisterGauge(
'test',
'some_gauge',
'it sets',
['someLabel' => 'defaultValue']
);
$gauge->set(2.5, ['type' => 'blue']);

// As well as histograms
$histogram = $registry->getOrRegisterHistogram(
'test',
'some_histogram',
'it observes',
['someLabel' => 'defaultValue'],
// [0.1, 1, 2, 3.5, 4, 5, 6, 7, 8, 9]
);
$histogram->observe(3.5, ['type' => 'blue']);

// And suummaries
$summary = $registry->getOrRegisterSummary(
'test',
'some_summary',
'it observes a sliding window',
['someLabel' => 'defaultValue'],
// 84600,
// [0.01, 0.05, 0.5, 0.95, 0.99]
);

$summary->observe(5, ['type' => 'blue']);
```

## API documentation

See [here »](https://daniil.it/better-prometheus/docs/) for the full API documentation.