Eppo SDK for PHP

EppoClient is a client sdk for eppo.cloud randomization API. It is used to retrieve the experiments data and put it to in-memory cache, and then get assignments information.

Getting Started

Refer to our SDK documentation for how to install and use the SDK.

Supported PHP Versions

This version of the SDK is compatible with PHP 7.3 and above.

Install

composer require eppo/php-sdk

Example

<?php

use Eppo\EppoClient;

require __DIR__ . '/vendor/autoload.php';

$eppoClient = EppoClient::init(
   "<your_api_key>",
   "<base_url>", // optional, default https://fscdn.eppo.cloud/api
   $assignmentLogger, // optional, must be an instance of Eppo\Logger\LoggerInterface
   $cache // optional, must be an instance of PSR-16 CacheInterface. If not passed, FileSystem cache will be used
);

$subjectAttributes = [];
$assignment = $eppoClient->getAssignment('subject-1', 'experiment_5', $subjectAttributes);

if ($assignment === 'control') {
    // do something
}

To make the experience of using the library faster, there is an option to start a background polling for randomization params. This way background job will start calling the Eppo api, updating the config in the cache.

For this, create a file, e.g. eppo-poller.php with the contents:

$eppoClient = EppoClient::init(
   "<your_api_key>",
   "<base_url>", // optional, default https://fscdn.eppo.cloud/api
   $assignmentLogger, // optional, must be an instance of Eppo\LoggerInterface
   $cache // optional, must be an instance of PSR-16 SimpleInterface. If not passed, FileSystem cache will be used
   $httpClient // optional, must be an instance of PSR-18 ClientInterface. If not passed, Discovery will be used to find a suitable implementation
   $requestFactory // optional, must be an instance of PSR-17 Factory. If not passed, Discovery will be used to find a suitable implementation
);

$eppoClient->startPolling();

after this, run this script by:

php eppo-poller.php

This will start an indefinite process of polling the Eppo-api.