CellTrust PHP was originally written to integrate CellTrust's SMS messaging API for Flocknote by Jeff Geerling.
CellTrust has a REST API that is used for sending and receiving messages, but I couldn't find any helpful PHP documentation or pre-existing libraries, so I wrote this class.
This code only implements bits of the CellTrust public messaging API (and not the private messaging API, since I don't need to use it). Sending and receiving messages is a simple affair:
// To send a message, create an instance of the class with your username and
// password, then set your message/keyword parameters, and send the message.
$sms = new CellTrust('myusername', 'mypassword');
$sms->setKeyword("mykeyword");
$sms->setShortcode(00000);
$sms->setMessage("My message here.");
$sms->setPhoneNumber("13145556666");
$sms->setPhoneCarrier(2);
$sms->sendSMS();// To receive a message, get the data delivered to your server, create an
// instance of the class with your username and password, then parse the
// data from CellTrust.
$input = file_get_contents('php://input'); // Get CellTrust request.
$sms = new CellTrust('myusername', 'mypassword');
$sms->parseIncomingSMS($input);
// Use getReceivedData() to return entire array of parameters received from
// CellTrust.
$received_data = $sms->getReceivedData();
// You can also retrieve received data granularly.
$message = $sms->getData(); // getMessage() and getData() may be different.CellTrust-PHP is licensed under the MIT (Expat) license. See included LICENSE.md.