Yii Validation

validate.php

class Validator extends CFormModel
{
	public $id;

	public function rules()
	{
		return [
			[['id'], 'required'],
			['id', 'length', 'max' => 50],
			['price', 'validatePrice'],
		];
	}

	public function validatePrice($attribute, $params)
	{
		$price = $this->$attribute;
		$allowEmpty = isset($params['allowEmpty']) ? $params['allowEmpty'] : true;
		if ($allowEmpty && !$price) return;
		$iso = new FbIsoFormat();
		$result = $iso->validatePrice($price);
		if (!$result) {
			$this->addError($attribute, 'Amount is not match to ISO 4217 standard. The format should be "number plus unit (ISO 4217)"');
		}
	}

  public function getErrorList($fields = []) {
		$errors = $this->getErrors();
		$data = [];
		foreach ($fields as $field) {
			if (!isset($this->$field)) continue;
			$fieldData = [
				'is_hidden' => 0,
				'readOnly' => 1,
				'key' => $field,
				'value' => $this->$field,
				'label' => $field,
				'is_valid' => 1,
				'is_required' => 0,
				'type' => 'string'
			];
			if (array_key_exists($field, $errors)) {
				$fieldData['is_valid'] = 0;
				$fieldData['error_msg'] = implode(", ", $errors[$field]);
			}
			$data[$field] = $fieldData;
		}

		return $data;
	}
}

$validator = new Validator();
$product = ['id' => '123', 'title' => 'Hello Steve, you are awesome' ];
$validator->attributes = $product;
$validator->validate();
return $validator->getErrors();

return $validator->getErrorList(array_keys($product));