/**
* @return array the validation rules.
*/
public function rules()
{
return [
[['a', 'b'], 'validateTotal']
];
}
public function validateTotal($attribute, $params)
{
if (((int)$this->a + (int)$this-><img src='http://www.yiiframework.com/forum/public/style_emoticons/default/cool.gif' class='bbc_emoticon' alt='B)' /> !== 100) {
$this->addError($attribute, 'Total of a + b must be 100');
}
}