twilio/twilio-php — pull request #65 by kevinburke (2012-06-03 23:13:04+00:00)
Title: Add PHP warning if user does not have curl defined

The library *may* work anyway, however it won't work that well and you won't be
able to make HTTP requests.

Assumes if you are passing in your own http object, you may be using some
different HTTP object and you are savvy enough to do what you want.