contoh OOP

<?php
    class layout
    {
        public $action = '#';
        public $method = 'post';
        public $user = '';
        public $pass = '';

        function from_login()
        {
            $tmp_txt =  "<form action='$this->action' method='$this->method'>";
            $tmp_txt .=    "User name: <input type='text' name='fname'><br>";
            $tmp_txt .=    "Password : <input type='password' name='lpass'><br>";

            if(!empty($this->user) and !empty($this->pass)){
               $tmp_txt .= "User:$this->user Pass:$this->pass <br>";
            }
            $tmp_txt .= "<input type='submit' value='Login'></form>";
            return $tmp_txt;
        }
    }

?>
<html>
  <body>
     <?php
        $layout = new layout;

        if(isset($_POST['fname']) and isset($_POST['lpass']))
        {
          $layout->user=$_POST['fname'];
          $layout->pass=$_POST['lpass'];
        }
        echo $layout->from_login();
     ?>
  </body>
</html>