Register Sys

<?

class Register {

    protected $server;
    protected $user;
    protected $pass;

    public function __construct($server, $user, $pass, $db, $insert) {
        $this->server = $server;
        $this->user = $user;
        $this->pass = $pass;
        $this->DB = $db;
        $this->data = $insert;
    }

    public function SQL($attrib) {
        if($attrib == "wizReg") {
            mysql_connect($this->server, $this->user, $this->pass);
            mysql_select_db($this->DB);
            mysql_query($this->data);
            mysql_close();
        }
        else echo "Denied to flex SQL.";
    }
}

if(isset($_POST["Submit"])) {
    $dir = file_get_contents("sql.ini");
    $sv = explode("_sv: ", $dir);
    $username = explode("_username: ", $dir);
    $password = explode("_password: ", $dir);
    $pengName = $_POST["Username"];
    $pengPass = $_POST["Password"];
    $pengRep = $_POST["RepeatPassword"];
    $pengMail = $_POST["Email"];

    mysql_connect($sv, $username, $password);
    $res = mysql_db_query("wizguin", 'SELECT * FROM users WHERE Username="' . $pengName . '"');

    if(mysql_num_rows($res) != 0) {
        mysql_close();
        die("Username already exists.");
  }

    elseif($pengPass == $pengRep) {
        $user = new Register($sv, $username, $password, "wizguin" ['INSERT INTO users (Username, Password, LoginKey, RegisteredTime, Buddies, Ignores, Inventory) VALUES ("Test", "Test", "123", "123", "[]", "[]", "[]")']);
        $user->SQL("wizReg");
    }
}

else echo "Failed to Register an account. Please try again later.";

?>