convert PHP code into Laravel code

this is the php code and i want to write this code in model Laravel

   <?php

                class devicesModel {

                    private $result;
                    protected $conn;
                    protected $db;

                    function __construct() {
                        $this->db = new Config();
                        $this->conn = $this->db->getConnection();
                    }

                    function verifyIfDeviceNumberValid($devicenumber) {
                        try {
                            $sqlQuery = "select id from devices where Devicenumber=$devicenumber";
                            $stmt = $this->conn->prepare($sqlQuery);
                            $stmt->execute();
                            $row2 = $stmt->fetch();
                            if (!empty($row2['id'])) {
                                return true;
                            }
                        } catch (PDOException $ex) {
                            $this->result = " Process failed unexpectedly";
                        }
                        return false;
                    }

                    function saveDeviceDetails($cartitems) {
                        try {
                            for ($i = 0; $i < count($_SESSION['verified']); $i++) {

                                $sqlQuery = "INSERT INTO `cartitems`(`devicenumber`) VALUES(" . $_SESSION['verified'][$i] . ")";
                                $stmt = $this->conn->prepare($sqlQuery);
                                $stmt->execute();
                            }
                            return TRUE;
                        } catch (PDOException $ex) {
                            $this->result = " Process failed unexpectedly".$ex->getMessage();
                        }
                        return false;
                    }

                    //Accesors and Mutators
                    function getResult() {
                        return $this->result;
                    }

                    function setResult($result) {
                        $this->result = $result;
                    }

                }