Bước 5: Tạo form input (ok) tạo thêm class AppModel, User extends AppModel && tạo file login.php

<?php  
	class Form {
		private $model = 'Model';
		protected $rules = null;
		public $inputs = array();
		public function input($name) {
    	$type = 'text';
	    foreach ($this->inputs as $field => $input) {
	      if ($field == $name) {
	        $type  = $input['type'];
	        $style = isset($input['style']) ? ' style="' . $input['style'] . '"' : '';
	        switch ($type) {
	          case 'text':
	            $inputField = '<input type="text"' . $style . ' name="data[' . $this->model . '][' . $name . ']"' . ' value="' . (isset($this->data[$this->model][$name]) ? $this->data[$this->model][$name] : '') . '" />';
	            break;
	          case 'password':
	            $inputField = '<input type="password"' . $style . ' name="data[' . $this->model . '][' . $name . ']"' . ' value="' . (isset($this->data[$this->model][$name]) ? $this->data[$this->model][$name] : '') . '" />';
	            break;
	        }
	      }
	    }
	    echo $inputField;
	  }
	  public function setRules($rules) {
	    if (!empty($rules)) {
	      $this->rules = $rules;
	      foreach ($rules as $field => $rule) {
	        if (isset($rule['form'])) {
	          $this->inputs[$field] = $rule['form'];
	        }
	      }
	    }
	  }
	}
?>
<?php  
	if(!class_exists('Form')) require_once 'Form.php';
	class AppModel {
		public $form = null;
		protected $rules = null;
		public function __construct() {
			$this->form = new Form();
			$this->form->setRules($this->rules);
		}
	};
?>
<?php  
require_once "AppModel.php";
class  User extends AppModel {
	protected $rules = array(
		"email" => array(
			"form" => array(
				"type" => "text"
			), 
			"notEmpty" => array(
				"rule" => "notEmpty", 
				"message" => MSG_ERR_NOTEMPTY
			), 
			"isEmail" => array(
				"rule" => "email", 
				"message" => MSG_ERR_EMAIL
			)
		), 
		"password" => array(
			"form" => array(
				"type" => "password"
			), 
			"notEmpty" => array(
				"rule" => "notEmpty", 
				"message" => MSG_ERR_NOTEMPTY
			)
		), 
		"fullname" => array(
			"form" => array(
				"type" => "text"
			), 
			"notEmpty" => array(
				"rule" => "notEmpty", 
				"message" => MSG_ERR_NOTEMPTY
			)
		), 
		"address" => array(
			"form" => array(
				"type" => "textarea"
			), 
			"notEmpty" => array(
				"rule" => "notEmpty", 
				"message" => MSG_ERR_NOTEMPTY
			)
		)
	);
	public function __construct() {
		parent::__construct();
	}
}
<?php  
	require_once 'const.php';
	require_once 'User.php';
	$user = new User();
?>
<!DOCTYPE html>
<title>User Login</title>
<link href="css/reset.css" rel="stylesheet" type="text/css" media="all">
<link href="css/main.css" rel="stylesheet" type="text/css" media="all">
<link href="css/form.css" rel="stylesheet" type="text/css" media="all">
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<script src="https://code.jquery.com/jquery-1.12.4.js"></script>
<script src="https://code.jquery.com/ui/1.12.0/jquery-ui.js"></script>
<link rel="stylesheet" href="//code.jquery.com/ui/1.12.0/themes/base/jquery-ui.css">
</head>
<body>
  <header>
    <div class="logo">
      <img src="images/film.png" width="45" />
      <div class="title">Platinum Cineplex</div>
    </div>
    <nav>
      <ul>
        <li><a href="#"><img src="images/logout.png" width="25">Logout</a></li>
      </ul>
    </nav>
  </header>
  <nav>
    <ul id="dropmenu">
      <li>
        <a href="#">Movie</a>
      </li>
    </ul>
  </nav>
  <div class="heading">User Login</div>
  <form action="" class="form" method="post">
    <section>
      <dl>
        <dt>Email</dt>
        <dd>
          <?php echo $user->form->input('email'); ?>
        </dd>
      </dl>
    </section>
    <section>
      <dl>
        <dt>Password</dt>
        <dd>
          <?php echo $user->form->input('password'); ?>
        </dd>
      </dl>
    </section>
    <section>
        <dl>
            <dd>
                <input type="submit" name="submit" value="Login"><br><br>
                <a href="http://localhost/testoop/login.php">Register</a>
            </dd>
        </dl>
    </section>
  </form>
  </div>
</body>

</html>
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