Bước 2: Tạo form input (ok)

<?php  
	class Form {
		private $model = 'Model';
		protected $rules = null;
		public $inputs = array();
		public function setRules($rules) {
			if (!empty($rules)) {
				$this->rules = $rules;
				foreach ($rules as $field => $rule) {
					if (isset($rule['form'])) {
						$this->inputs[$field] = $rule['form'];
					}
				}
			}
		}
		public function input($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="" />';
						break;
					}
				}
			}
			echo $inputField;
		}
	};
	$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'
				)
			)
		);
	$form = new Form();
	$form->setRules($rules);
	$form->input('email');
?>