The Google Docs PHP Sample Code demonstrates how to create a PHP command line to make API requests. Developers require PHP 5.4+, a composer dependency management tool, and a Google account to run the quick start.
Late last week Google announced the release of version 3.0 of their Google Documents List Data API. This latest release addresses several feature requests filed by developers and also aims to improve speed and stability of the API itself (our Documents List Data API Profile). The most notable detail in this release is the ability to upload and download files in PDF.