PHP development: Use Flysystem to implement multiple cloud storage services

With the development of cloud computing and cloud storage, more and more developers are beginning to use cloud storage to solve the problems of storing and transmitting data. In PHP development, Flysystem is a very useful tool that provides a unified API to easily use many different cloud storage services. In this article, we will describe how to use Flysystem to implement multiple cloud storage services and show some sample code for different services.

What is Flysystem?

Flysystem is a PHP library for working with file systems. It provides a set of APIs that enable access to local file systems, FTP, SFTP, cloud storage services such as Amazon S3, Rackspace Cloud, OpenStack Object Storage, Dropbox, and Google Drive. Flysystem provides a very simple API through which you can quickly implement common operations such as file upload, download, and deletion.

How to use Flysystem?

To use Flysystem, you need to install the relevant packages through Composer. Flysystem can be installed through the following command:

composer require league/flysystem

After the installation is complete, you can start using Flysystem. The following is a simple usage example:

use LeagueFlysystemFilesystem;
use LeagueFlysystemAdapterLocal;

$adapter = new Local(__DIR__.'/files');
$filesystem = new Filesystem($adapter);

$contents = $filesystem->read('hello.txt');

In this example, we create a local File system adapter and uses it to create a file system object. Next, we read the contents of a file named hello.txt through the file system object.

Implementing multiple cloud storage services

To use Flysystem to implement multiple cloud storage services, you need to use different adapters. Flysystem supports a number of different adapters, each of which is independent and can be used with different cloud storage services.

Here are some common adapters and how to use them:

• Local Adapter: used to access the local file system.

  use LeagueFlysystemAdapterLocal;
  
  $adapter = new Local(__DIR__.'/files');

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• FTP Adapter: Used to access FTP servers.

  use LeagueFlysystemAdapterFtp;
  
  $config = [
    'host' => 'ftp.example.com',
    'username' => 'username',
    'password' => 'password',
    'root' => '/public_html/',
  ];
  
  $adapter = new Ftp($config);

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• SFTP adapter: used to access the SFTP server.

  use LeagueFlysystemSftpSftpAdapter;
  
  $config = [
    'host' => 'sftp.example.com',
    'port' => 22,
    'username' => 'username',
    'password' => 'password',
    'root' => '/public_html/',
  ];
  
  $adapter = new SftpAdapter($config);

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• Amazon S3 Adapter: Used to access Amazon S3.

  use AwsS3S3Client;
  use LeagueFlysystemAwsS3v3AwsS3Adapter;
  
  $client = new S3Client([
    'region' => 'us-west-2',
    'version' => 'latest',
    'credentials' => [
        'key'    => 'key',
        'secret' => 'secret',
    ],
  ]);
  
  $adapter = new AwsS3Adapter($client, 'bucket-name');

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• Rackspace Cloud Adapter: Used to access Rackspace Cloud.

  use OpenCloudRackspace;
  use LeagueFlysystemRackspaceRackspaceAdapter;
  
  $client = new Rackspace(Rackspace::US_IDENTITY_ENDPOINT, [
    'username' => 'username',
    'apiKey'   => 'apiKey',
  ]);
  
  $adapter = new RackspaceAdapter($client, 'container-name');

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• OpenStack Object Storage Adapter: Used to access OpenStack Object Storage.

  use OpenCloudOpenStack;
  use LeagueFlysystemOpenStackOpenStackAdapter;
  
  $client = new OpenStack('https://identity.example.com/v2.0/', [
    'username' => 'username',
    'password' => 'password',
    'tenantName' => 'tenant-name',
  ]);
  
  $adapter = new OpenStackAdapter($client->objectStoreService(), 'container-name');

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• Dropbox Adapter: Used to access Dropbox.

  use KunnuDropboxDropbox;
  use LeagueFlysystemDropboxDropboxAdapter;
  
  $dropbox = new Dropbox([
    'access_token' => 'access-token',
    'client_identifier' => 'client-identifier', // Optional parameter
  ]);
  
  $adapter = new DropboxAdapter($dropbox);

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• Google Drive Adapter: Used to access Google Drive.

  use SpatieGoogleDriveClient;
  use SpatieFlysystemGoogleDriveGoogleDriveAdapter;
  
  $config = [
    'client_id' => 'client_id',
    'client_secret' => 'client_secret',
    'access_token' => 'access_token',
    'refresh_token' => 'refresh_token',
  ];
  
  $client = new Client($config);
  
  $adapter = new GoogleDriveAdapter($client);

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  Conclusion

  Flysystem is a very practical PHP library that can help us easily implement a variety of cloud storage services. Whether you're accessing your local file system, FTP, SFTP, Amazon S3, Rackspace Cloud, OpenStack Object Storage, Dropbox or Google Drive, you can use Flysystem. When developing PHP applications, using Flysystem can help us quickly implement file upload, download, delete and other operations, thereby further improving development efficiency.

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