...If you are interested in using the PHP Admin SDK as a client for end-user access (for example, in a web application), as opposed to admin access from a privileged environment (like a server), you should instead follow the instructions for setting up the client JavaScript SDK. 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. Create a new project in the Firebase console, if you don’t already have one.