LaunchDarkly SDK for PHP

Requirements

PHP 5.5 or higher.

Quick setup

Install the PHP SDK and monolog for logging with Composer

 php composer.phar require launchdarkly/launchdarkly-php

After installing, require Composer's autoloader:
```
 require 'vendor/autoload.php';
```

Create a new LDClient with your SDK key:

 $client = new LaunchDarkly\LDClient("your_sdk_key");

Your first feature flag

Create a new feature flag on your dashboard

In your application code, use the feature's key to check whether the flag is on for each user:

 $user = new LaunchDarkly\LDUser("user@test.com");
 if ($client->variation("your.flag.key", $user)) {
     # application code to show the feature
 } else {
     # the code to run if the feature is off
 }

Fetching flags

There are two approaches to fetching the flag rules from LaunchDarkly:

Making HTTP requests (using Guzzle)
Setting up the ld-daemon to store the flags in Redis

Using Guzzle

To use Guzzle it must be required as a dependency:

php composer.phar require "guzzlehttp/guzzle:6.2.1"
php composer.phar require "kevinrob/guzzle-cache-middleware:1.4.1"

It will then be used as the default way of fetching flags.

Using Redis

Require Predis as a dependency:

php composer.phar require "predis/predis:1.0.*"
Create the LDClient with the Redis feature requester as an option:

$client = new LaunchDarkly\LDClient("your_sdk_key", ['feature_requester_class' => 'LaunchDarkly\LDDFeatureRequester']);

Testing

We run integration tests for all our SDKs using a centralized test harness. This approach gives us the ability to test for consistency across SDKs, as well as test networking behavior in a long-running application. These tests cover each method in the SDK, and verify that event sending, flag evaluation, stream reconnection, and other aspects of the SDK all behave correctly.

Learn more

Check out our documentation for in-depth instructions on configuring and using LaunchDarkly. You can also head straight to the complete reference guide for this SDK.

Contributing

We encourage pull-requests and other contributions from the community. We've also published an SDK contributor's guide that provides a detailed explanation of how our SDKs work.

About LaunchDarkly

License

jdrieghe/php-client

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