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Google APIs Client Library for PHP

The Google API Client Library enables you to work with Google APIs such as Google+, Drive, or YouTube on your server.

These client libraries are officially supported by Google. However, the libraries are considered complete and are in maintenance mode. This means that we will address critical bugs and security issues but will not add any new features.

Google Cloud Platform

For Google Cloud Platform APIs such as Datastore, Cloud Storage or Pub/Sub, we recommend using GoogleCloudPlatform/google-cloud-php which is under active development.

Requirements

• PHP 5.4.0 or higher

Developer Documentation

http://developers.google.com/api-client-library/php

Installation

You can use Composer or simply Download the Release

Composer

The preferred method is via composer. Follow the installation instructions if you do not already have composer installed.

Once composer is installed, execute the following command in your project root to install this library:

Finally, be sure to include the autoloader:

Download the Release

If you abhor using composer, you can download the package in its entirety. The Releases page lists all stable versions. Download any file with the name google-api-php-client-[RELEASE_NAME].zip for a package including this library and its dependencies.

Uncompress the zip file you download, and include the autoloader in your project:

For additional installation and setup instructions, see the documentation.

Examples

See the examples/ directory for examples of the key client features. You can view them in your browser by running the php built-in web server.

And then browsing to the host and port you specified (in the above example, http://localhost:8000).

Basic Example

Authentication with OAuth

An example of this can be seen in examples/simple-file-upload.php.

1. Follow the instructions to Create Web Application Credentials
2. Download the JSON credentials

3. Set the path to these credentials using Google_Client::setAuthConfig:

4. Set the scopes required for the API you are going to call

5. Set your application's redirect URI

6. In the script handling the redirect URI, exchange the authorization code for an access token:

Authentication with Service Accounts

An example of this can be seen in examples/service-account.php.

Some APIs (such as the YouTube Data API) do not support service accounts. Check with the specific API documentation if API calls return unexpected 401 or 403 errors.

1. Follow the instructions to Create a Service Account
2. Download the JSON credentials

3. Set the path to these credentials using the GOOGLE_APPLICATION_CREDENTIALS environment variable:

4. Tell the Google client to use your service account credentials to authenticate:

5. Set the scopes required for the API you are going to call

6. If you have delegated domain-wide access to the service account and you want to impersonate a user account, specify the email address of the user account using the method setSubject:

Making Requests

The classes used to call the API in google-api-php-client-services are autogenerated. They map directly to the JSON requests and responses found in the APIs Explorer.

A JSON request to the Datastore API would look like this:

Using this library, the same call would look something like this:

However, as each property of the JSON API has a corresponding generated class, the above code could also be written like this:

The method used is a matter of preference, but it will be very difficult to use this library without first understanding the JSON syntax for the API, so it is recommended to look at the APIs Explorer before using any of the services here.

Making HTTP Requests Directly

If Google Authentication is desired for external applications, or a Google API is not available yet in this library, HTTP requests can be made directly.

The authorize method returns an authorized Guzzle Client, so any request made using the client will contain the corresponding authorization.

Caching

It is recommended to use another caching library to improve performance. This can be done by passing a PSR-6 compatible library to the client:

In this example we use PHP Cache. Add this to your project with composer:

Updating Tokens

When using Refresh Tokens or Service Account Credentials, it may be useful to perform some action when a new access token is granted. To do this, pass a callable to the setTokenCallback method on the client:

Debugging Your HTTP Request using Charles

It is often very useful to debug your API calls by viewing the raw HTTP request. This library supports the use of Charles Web Proxy. Download and run Charles, and then capture all HTTP traffic through Charles with the following code:

Now all calls made by this library will appear in the Charles UI.

One additional step is required in Charles to view SSL requests. Go to Charles > Proxy > SSL Proxying Settings and add the domain you'd like captured. In the case of the Google APIs, this is usually *.googleapis.com.

Service Specific Examples

YouTube: https://github.com/youtube/api-samples/tree/master/php

How Do I Contribute?

Please see the contributor license agreement.

Frequently Asked Questions

What do I do if something isn't working?

For support with the library the best place to ask is via the google-api-php-client tag on StackOverflow: http://stackoverflow.com/questions/tagged/google-api-php-client

If there is a specific bug with the library, please file a issue in the Github issues tracker, including an example of the failing code and any specific errors retrieved. Feature requests can also be filed, as long as they are core library requests, and not-API specific: for those, refer to the documentation for the individual APIs for the best place to file requests. Please try to provide a clear statement of the problem that the feature would address.

I want an example of X!

If X is a feature of the library, file away! If X is an example of using a specific service, the best place to go is to the teams for those specific APIs - our preference is to link to their examples rather than add them to the library, as they can then pin to specific versions of the library. If you have any examples for other APIs, let us know and we will happily add a link to the README above!

Why do you still support 5.2?

When we started working on the 1.0.0 branch we knew there were several fundamental issues to fix with the 0.6 releases of the library. At that time we looked at the usage of the library, and other related projects, and determined that there was still a large and active base of PHP 5.2 installs. You can see this in statistics such as the PHP versions chart in the WordPress stats: http://wordpress.org/about/stats/. We will keep looking at the types of usage we see, and try to take advantage of newer PHP features where possible.

Why does Google_..._Service have weird names?

The _Service classes are generally automatically generated from the API discovery documents: https://developers.google.com/discovery/. Sometimes new features are added to APIs with unusual names, which can cause some unexpected or non-standard style naming in the PHP classes.

How do I deal with non-JSON response types?

Some services return XML or similar by default, rather than JSON, which is what the library supports. You can request a JSON response by adding an 'alt' argument to optional params that is normally the last argument to a method call:

How do I set a field to null?

The library strips out nulls from the objects sent to the Google APIs as its the default value of all of the uninitialized properties. To work around this, set the field you want to null to Google_Model::NULL_VALUE. This is a placeholder that will be replaced with a true null when sent over the wire.

Code Quality

Run the PHPUnit tests with PHPUnit. You can configure an API key and token in BaseTest.php to run all calls, but this will require some setup on the Google Developer Console.

phpunit tests/

Coding Style

To check for coding style violations, run

To automatically fix (fixable) coding style violations, run