I asked the same question a while ago and got it working
http://laravel.io/forum/01-25-2016-how-do-i-send-a-text-message-in-laravel
Install Guzzle using composer using this link: https://github.com/guzzle/guzzle
Forget about the require autoload part and use the script that terreporter posted. Just add a backslash before guzzle as i stated in the last response.
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