包括没有php.ini文件的google + api php客户端库

I'm going to integrate google+ sign in with my website and I have now come to a point where I have to setup code on the serverside. Google has this page on how to install their php library: https://developers.google.com/api-client-library/php/start/installation. They recomend using php.ini to include thheir library but my web hoster doesn't allow me to edit php.ini.

I'm supposed to use this library to authenticate users, login users, logout user etcetera. As far as I understand.

How should I include all the necesarry dependencies without editing php.ini? Including the files individually with include or require didn't work for me.

Thanks.

In the footer of the link in your question it states:

Alternatively, you can set the same ini directive dynamically in your code.

set_include_path(get_include_path() . PATH_SEPARATOR . '/path/to/google-api-php-client/src');

You can follow this step instead of modifying php.ini