<?php 
    class incomingMessages {

        private $to;
        private $from;
        private $msg;
        private $userfield;
        private $date;

        function setVar($variable, $value) {

            $this->$variable = $value;

        }

        function getVar($variable) {

            return $this->$variable;

        }

        function foo() {

            //Manage Incoming Message

        }

    }

    $incomingMessage = new incomingMessages();

    $incomingMessage->setVar('to', $_REQUEST['to']);
    $incomingMessage->setVar('from', $_REQUEST['from']);
    $incomingMessage->setVar('msg', $_REQUEST['msg']);
    $incomingMessage->setVar('userfield', $_REQUEST['userfield']);
    $incomingMessage->setVar('date', $_REQUEST['date']);

    echo 'OK';
?>