# Overview¶

## Installation¶

The recommended way to install the Firebase Admin SDK is with Composer. Composer is a dependency management tool for PHP that allows you to declare the dependencies your project needs and installs them into your project.

composer require kreait/firebase-php ^4.17.0

Alternatively, you can specify the Firebase Admin SDK as a dependency in your project’s existing composer.json file:

{
"require": {
"kreait/firebase-php": "^4.17.0"
}
}

After installing, you need to require Composer’s autoloader:

<?php

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

You can find out more on how to install Composer, configure autoloading, and other best-practices for defining dependencies at getcomposer.org.

Please continue to the Setup section to learn more about connecting your application to Firebase.

## Usage example¶

You can find more usage examples at https://github.com/jeromegamez/firebase-php-examples and in the tests directory of this project’s GitHub repository.

<?php

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

use Kreait\Firebase\Factory;
use Kreait\Firebase\ServiceAccount;

// This assumes that you have placed the Firebase credentials in the same directory
// as this PHP file.
$serviceAccount = ServiceAccount::fromJsonFile(__DIR__.'/google-service-account.json');$firebase = (new Factory)
->withServiceAccount($serviceAccount) // The following line is optional if the project id in your credentials file // is identical to the subdomain of your Firebase project. If you need it, // make sure to replace the URL with the URL of your project. ->withDatabaseUri('https://my-project.firebaseio.com') ->create();$database = $firebase->getDatabase();$newPost = $database ->getReference('blog/posts') ->push([ 'title' => 'Post title', 'body' => 'This should probably be longer.' ]);$newPost->getKey(); // => -KVr5eu8gcTv7_AHb-3-
$newPost->getUri(); // => https://my-project.firebaseio.com/blog/posts/-KVr5eu8gcTv7_AHb-3-$newPost->getChild('title')->set('Changed post title');
$newPost->getValue(); // Fetches the data from the realtime database$newPost->remove();

## License¶

Licensed using the MIT license.

Copyright (c) 2016-2018 Jérôme Gamez <https://github.com/jeromegamez> <jerome@gamez.name>

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the “Software”), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

## Contributing¶

### Guidelines¶

1. The SDK utilizes PSR-1, PSR-2, PSR-4, and PSR-7.
2. This SDK has a minimum PHP version requirement of PHP 7.0. Pull requests must not require a PHP version greater than PHP 7.0 unless the feature is only utilized conditionally.
3. All pull requests must include unit tests to ensure the change works as expected and to prevent regressions.

### Running the tests¶

The SDK is unit tested with PHPUnit. Run the tests using the Makefile:

make tests

### Coding standards¶

The SDK uses the PHP Coding Standars Fixer to ensure a uniform coding style. Apply coding standard fixed using the Makefile:

make cs

from the root of the project.