If you want to use Twilio, they provide already the PHP library and I just create the php script that executes the sending of SMS. Do you have a twilio account already or shall I set up that for you?? Should I get the phone numbers from your database or something or how you want to use this script exactly?
I'm around if you wanna further discuss!
Now, what I copy-paste about me:
I've been in a web agency as web developer (both front and back end, although I prefer the second). Before that I was a programmer in a stock-market related company that selled databases here in Mexico.
I'm an engineer btw. I'm fluent in English, German and native in Spanish.
I would love to collaborate with you, let me know!
Alex