syntax error, unexpected end of file in C:\xampp\htdocs\benepik\using_class\userinsertusingclass.php on line 37

I make a simple HTML form and insert data in PHP through class I am new in PDO class so have no idea for insert data in the database and my PHP code is that

<?php

if(isset($_POST['submit']))
{
    $fname=$_POST['fname'];
    $lname=$_POST['lname'];
    $email=$_POST['email'];
    $mnumber=$_POST['mnumber'];
    $status=1;

    // configuration of php and database connection

    define('DB_SERVER','localhost');
    define('DB_USER','root');
    define('DB_PASS' ,'');
    define('DB_NAME', 'test');

    class DB_con
    {
        function __construct()
        {
            $con = mysqli_connect(DB_SERVER,DB_USER,DB_PASS,DB_NAME);
            $this->dbh=$con;
            // Check connection
            if (mysqli_connect_errno())
            {
                echo "Failed to connect to MySQL: " . mysqli_connect_error();
            }
        }
        public function insert($fname,$lname,$contact,$email,$mnumber,$status)
        {
            $ret=mysqli_query($this->dbh,"user (`FirstName`, `LastName`, `EmailId`, `ContactN`, `Status`) VALUES ('$fname','$lname','$email','$mnumber','$status')");
            return $ret;
        }
    }
}
?>