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## What This PR removes or updates references in the docs to Heroku. Most of the code samples have been replaced with a more generic `unleash.example.com` url, while other references have been removed or updated. Also removes old OpenAPI files that are out of date and redundant with the new generation. ## Background Come November and Heroku will no longer offer free deployments of Unleash, so it's about time we remove that claim. Links to the heroku instance are also outdated because we don't have that instance running anymore. Finally, the OpenAPI files we do have there are old and static, so they don't match the current reality. ## Commits * Meta: update ignore file to ignore autogenerated docs I must've missed the ignore file when looking for patterns. * docs: delete old openapi file. This seems to have been a holdover from 2020 and is probably hand-written. It has been superseded by the new autogenerated OpenAPI docs. * docs: add notes for heroku changes to the frontend readme and pkg * docs: remove old openapi article and add redirects to new openapi * docs: fix link in overview doc: point to GitHub instead of heroku * docs: update quickstart docs with new heroku details * docs: remove reference to crashing heroku instance * docs: remove references to herokuapp in code samples * docs: add a placeholder comment * docs: update references for heroku updates * docs: keep using unleash4 for enterprise * docs: remove start:heroku script in favor of start:sandbox * docs: remove 'deploy on heroku button' Now that it's not free anymore (or won't be very shortly), let's remove it. * docs: remove extra newline
102 lines
3.8 KiB
Markdown
102 lines
3.8 KiB
Markdown
---
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id: php_sdk
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title: PHP SDK
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---
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In this guide we explain how to use feature toggles in a PHP application using Unleash-hosted. We will be using the open source Unleash [PHP Client SDK](https://github.com/Unleash/unleash-client-php).
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> You will need your `API URL` and your `API token` in order to connect the Client SDK to you Unleash instance. You can find this information in the “Admin” section Unleash management UI. [Read more](../user_guide/api-token)
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## Step 1: Install the client SDK {#step-1-install-the-client-sdk}
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First we must add Unleash Client SDK as a dependency to your project. Below is an example of how to install it via composer:
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```shell
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composer require unleash/client guzzlehttp/guzzle symfony/cache
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```
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> Note: You can install any other PSR-16, PSR-17 and PSR-18 implementations instead of guzzlehttp/guzzle and symfony/cache
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## Step 2: Create a new Unleash Instance {#step-2-create-a-new-unleash-instance}
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Next we must initialize a new instance of the Unleash Client.
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```php
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<?php
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use Unleash\Client\UnleashBuilder;
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$unleash = UnleashBuilder::create()
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->withAppName('my.php-app')
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->withInstanceId('your-instance-1')
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->withAppUrl('API URL')
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->withHeader('Authorization', 'API token')
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->build();
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```
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In your app you typically just want one instance of Unleash, and inject that where you need it. You will typically use a dependency injection frameworks to manage this.
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You should change the URL and the Authorization header (API token) with the correct values for your instance, which you may locate under “Instance admin” in the menu.
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## Step 3: Use the feature toggle {#step-3-use-the-feature-toggle}
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Now that we have initialized the client SDK we can start using feature toggles defined in Unleash in our application. To achieve this we have the “isEnabled” method available, which will allow us to check the value of a feature toggle. This method will return **true** or **false** based on whether the feature should be enabled or disabled for the current request.
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```php
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<?php
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if ($unleash->isEnabled("AwesomeFeature")) {
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//do some magic
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} else {
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//do old boring stuff
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}
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```
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Read more about the [Unleash architecture](https://www.unleash-hosted.com/articles/our-unique-architecture) to learn how it works in more details
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## Step 4: Provide Unleash Context {#step-4-provide-unleash-context}
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It is the client SDK that computes whether a feature toggle should be considered enabled or disabled for specific use request. This is the job of the [activation strategies](../user_guide/activation-strategies.md), which are implemented in the client SDK.
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The activation strategies is an implementation of rules based on data, which you provide as part of the Unleash Context.
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**a) As argument to the isEnabled call**
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The simplest way to provide the Unleash Context is as part of the “isEnabled” call:
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```php
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<?php
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use Unleash\Client\Configuration\UnleashContext;
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$context = new UnleashContext(
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currentUserId: 'user@mail.com',
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);
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$unleash->isEnabled("someToggle", $context);
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```
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**b) Via a UnleashContextProvider**
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This is a bit more advanced approach, where you configure a unleash-context provider. By doing this you do not have to rebuild or to pass the unleash-context object to every place you are calling `$unleash->isEnabled()`.
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```php
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<?php
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use Unleash\Client\UnleashBuilder;
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$contextProvider = new MyAwesomeContextProvider();
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$unleash = UnleashBuilder::create()
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->withAppName('my.php-app')
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->withInstanceId('your-instance-1')
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->withAppUrl('https://unleash.example.com/api/')
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->withContextProvider($contextProvider)
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->build();
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// Anywhere in the code unleash will get the unleash context from your registered provider.
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$unleash->isEnabled("someToggle");
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```
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> You can read more complete documentation in the [Client SDK repository](https://github.com/Unleash/unleash-client-php).
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