public function getInvalidField($field)
    {
        $value = isset($this->_invalid[$field]) ? $this->_invalid[$field] : null;

        return $value;
    }
public function getInvalidField($field)
    {
        $value = isset($this->_invalid[$field]) ? $this->_invalid[$field] : null;

        return $value;
    }
public function getInvalidField ( $ field ) { $ value = isset ( $ this -> _invalid [ $ field ] ) ? $ this -> _invalid [ $ field ] : null ; return $ value ; }
Get a single value of an invalid field. Returns null if not set.

@param string $field The name of the field.
@return mixed
Get a single value of an invalid field . Returns null if not set .