I would like to make a plain website and when you enter an Address in a line, then hit enter, the address that is typed in will go to certain peoples cell phone number.. This should be quite simple, but what programming should I look into to get this job done?' I imagine it will take more than one type since one is web based and the other to send the message to the phones. Thanks in advance!
Any server side lang should do. You might want to look into some sms API's. Google "sms api", that should help get you started to figure out how to go about what you need done.
Nice find. I wouldn't mind giving an SMS service a try and develop an encryption plugin/app. for smart phones.
Yep, you will need an SMS gateway unless you get your own server that has the hardware on it to send sms.
PHP should easily allow you to interact with most SMS text messaging gateways out there. Do a search and look for example API code.