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# AWS SDK for PHP
The AWS SDK for PHP enables developers to build solutions for Amazon Simple Storage Service (Amazon S3),
Amazon Elastic Compute Cloud (Amazon EC2), Amazon SimpleDB, and more. With the AWS SDK for PHP, developers
can get started in minutes with a single, downloadable package.
The SDK features:
* **AWS PHP Libraries:** Build PHP applications on top of APIs that take the complexity out of coding directly
against a web service interface. The toolkit provides APIs that hide much of the lower-level implementation.
* **Code Samples:** Practical examples for how to use the toolkit to build applications.
* **Documentation:** Complete SDK reference documentation with samples demonstrating how to use the SDK.
* **PEAR package:** The ability to install the AWS SDK for PHP as a PEAR package.
* **SDK Compatibility Test:** Includes both an HTML-based and a CLI-based SDK Compatibility Test that you can
run on your server to determine whether or not your PHP environment meets the minimum requirements.
For more information about the AWS SDK for PHP, including a complete list of supported services, see
[aws.amazon.com/sdkforphp](http://aws.amazon.com/sdkforphp).
## Staying up-to-date!
We tend to release new updates very frequently. In order to keep up with the newest features and the latest bug fixes,
we encourage you to subscribe to our release announcements, and to keep your code current.
### Release announcements
You can subscribe to release announcements via:
* [RSS feed](http://pear.amazonwebservices.com/feed.xml)
* [Twitter](https://twitter.com/awssdkforphp)
* [Facebook](https://www.facebook.com/pages/AWS-SDK-for-PHP/276240099155588)
* [Mobile notifications](http://ifttt.com/recipes/52404)
* [SMS notifications](http://ifttt.com/recipes/52409)
* [Email notifications](http://ifttt.com/recipes/52408)
Only the RSS feed is supported by AWS. The other channels are bots created/managed by third-parties.
### Getting the latest versions
You can get the latest version of the SDK via:
* [Composer/Packagist](http://packagist.org/packages/amazonwebservices/aws-sdk-for-php)
* [PEAR channel](http://pear.amazonwebservices.com)
* [GitHub](http://github.com/amazonwebservices/aws-sdk-for-php)
* [Zip file](http://aws.amazon.com/sdkforphp/)
## Source
The source tree for includes the following files and directories:
* `_compatibility_test` -- Includes both an HTML-based and a CLI-based SDK Compatibility Test that you can
run on your server to determine whether or not your PHP environment meets the minimum requirements.
* `_docs` -- Informational documents, the contents of which should be fairly self-explanatory.
* `_samples` -- Code samples that you can run out of the box.
* `extensions` -- Extra code that can be used to enhance usage of the SDK, but isn't a service class or a
third-party library.
* `lib` -- Contains any third-party libraries that the SDK depends on. The licenses for these projects will
always be Apache 2.0-compatible.
* `services` -- Contains the service-specific classes that communicate with AWS. These classes are always
prefixed with `Amazon`.
* `utilities` -- Contains any utility-type methods that the SDK uses. Includes extensions to built-in PHP
classes, as well as new functionality that is entirely custom. These classes are always prefixed with `CF`.
* `README` -- The document you're reading right now.
* `config-sample.inc.php` -- A sample configuration file that should be filled out and renamed to `config.inc.php`.
* `sdk.class.php` -- The SDK loader that you would include in your projects. Contains the base functionality
that the rest of the SDK depends on.
## Minimum Requirements in a nutshell
* You are at least an intermediate-level PHP developer and have a basic understanding of object-oriented PHP.
* You have a valid AWS account, and you've already signed up for the services you want to use.
* The PHP interpreter, version 5.2 or newer. PHP 5.2.17 or 5.3.x is highly recommended for use with the AWS SDK for PHP.
* The cURL PHP extension (compiled with the [OpenSSL](http://openssl.org) libraries for HTTPS support).
* The ability to read from and write to the file system via [file_get_contents()](http://php.net/file_get_contents) and [file_put_contents()](http://php.net/file_put_contents).
If you're not sure whether your PHP environment meets these requirements, run the
[SDK Compatibility Test](http://github.com/amazonwebservices/aws-sdk-for-php/tree/master/_compatibility_test/) script
included in the SDK download.
## Installation
### Via GitHub
[Git](http://git-scm.com) is an extremely fast, efficient, distributed version control system ideal for the
collaborative development of software. [GitHub](http://github.com/amazonwebservices) is the best way to
collaborate with others. Fork, send pull requests and manage all your public and private git repositories.
We believe that GitHub is the ideal service for working collaboratively with the open source PHP community.
Git is primarily a command-line tool. GitHub provides instructions for installing Git on
[Mac OS X](http://help.github.com/mac-git-installation/), [Windows](http://help.github.com/win-git-installation/),
and [Linux](http://help.github.com/linux-git-installation/). If you're unfamiliar with Git, there are a variety
of resources on the net that will help you learn more:
* [Git Immersion](http://gitimmersion.com) is a guided tour that walks through the fundamentals of Git, inspired
by the premise that to know a thing is to do it.
* The [PeepCode screencast on Git](https://peepcode.com/products/git) ($12) will teach you how to install and
use Git. You'll learn how to create a repository, use branches, and work with remote repositories.
* [Git Reference](http://gitref.org) is meant to be a quick reference for learning and remembering the most
important and commonly used Git commands.
* [Git Ready](http://gitready.com) provides a collection of Git tips and tricks.
* If you want to dig even further, I've [bookmarked other Git references](http://pinboard.in/u:skyzyx/t:git).
If you're comfortable working with Git and/or GitHub, you can pull down the source code as follows:
git clone git://github.com/amazonwebservices/aws-sdk-for-php.git AWSSDKforPHP
cd ./AWSSDKforPHP
### Via PEAR
[PEAR](http://pear.php.net) stands for the _PHP Extension and Application Repository_ and is a framework and
distribution system for reusable PHP components. It is the PHP equivalent to package management software such as
[MacPorts](http://macports.org) and [Homebrew](https://github.com/mxcl/homebrew) for Mac OS X,
[Yum](http://fedoraproject.org/wiki/Tools/yum) and [Apt](http://wiki.debian.org/Apt) for GNU/Linux,
[RubyGems](http://rubygems.org) for Ruby, [Easy Install](http://packages.python.org/distribute/easy_install.html)
for Python, [Maven](http://maven.apache.org) for Java, and [NPM](http://npm.mape.me) for Node.js.
PEAR packages are very easy to install, and are available in your PHP environment path so that they are accessible
to any PHP project. PEAR packages are not specific to your project, but rather to the machine that they're
installed on.
From the command-line, you can install the SDK with PEAR as follows:
pear channel-discover pear.amazonwebservices.com
pear install aws/sdk
You may need to use `sudo` for the above commands. Once the SDK has been installed via PEAR, you can load it into
your project with:
require_once 'AWSSDKforPHP/sdk.class.php';
### Via Composer
[Composer](http://getcomposer.org) is a newer dependency manager for PHP, and is now supported by the SDK.
In order to use the AWS SDK for PHP via Composer, you must do the following:
1. Add ``amazonwebservices/aws-sdk-for-php`` as a dependency in your project's ``composer.json`` file:
{
"require": {
"amazonwebservices/aws-sdk-for-php": "*"
}
}
Consider tightening your dependencies to a known version when deploying mission critical applications (e.g. ``1.5.*``).
2. Download and install Composer:
curl -s http://getcomposer.org/installer | php
3. Install your dependencies:
php composer.phar install
4. Require Composer's autoloader
Composer also prepares an autoload file that's capable of autoloading all of the classes in any of the libraries that it downloads. To use it, just add the following line to your code's bootstrap process:
require '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](http://getcomposer.org).
## Configuration
1. Copy the contents of [config-sample.inc.php](https://github.com/amazonwebservices/aws-sdk-for-php/raw/master/config-sample.inc.php)
and add your credentials as instructed in the file.
2. Move your file to `~/.aws/sdk/config.inc.php`.
3. Make sure that `getenv('HOME')` points to your user directory. If not you'll need to set
`putenv('HOME=<your-user-directory>')`.
This is because PHP will attempt to load the file from your user directory (e.g., `~/.aws/sdk/config.inc.php`).
If PHP doesn't happen to know where your user directory is, you'll need to tell PHP where it is with the `putenv()`
function.
## Additional Information
* AWS SDK for PHP: <http://aws.amazon.com/sdkforphp>
* Documentation: <http://docs.amazonwebservices.com/AWSSDKforPHP/latest/>
* License: <http://aws.amazon.com/apache2.0/>
* Discuss: <http://aws.amazon.com/forums>