Tạo form động bằng PHP (ok) class ...

<?php  
	define('MSG_ERR_NOTEMPTY', 'Please enter this field');
	define('MSG_ERR_EMAIL', 'Please enter correct email address');
	class Form {
		private $model = 'Model';
		public $inputs = array();
		public $rules = array(
			'email' => array(
				'form' => array(
					'type' => 'text'
				),
				'notEmpty' => array(
					'rule' => 'notEmpty',
					'message'=> MSG_ERR_NOTEMPTY
				),
				"isEmail" => array(
					'rule' => "email",
					'message' => MSG_ERR_EMAIL
				)
			),
			'password' => array(
				'form' => array(
					'type' => 'password'
				),
				'notEmpty' => array(
					'rule' => 'notEmpty',
					'message' => MSG_ERR_NOTEMPTY
				)
			)
		);
		public function setRules($rules) {
			if(!empty($rules)) {
				foreach ($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;
						case 'password':
						$inputField = '<input type="password"'.$style.' name="data['.$this->model.']['.$name.']" value="">';
						break;
					}
				}
			}
			echo $inputField;
		}
	};
	$form = new Form();
	$form->setRules($form->rules);
	$form->input('email');
	$form->input('password');
?>