public function isCancer()
    {
        return ($this->month === self::MONTH_JUNE) && ($this->day >= 22) && ($this->day <= 30) || ($this->month === self::MONTH_JULY) && ($this->day <= 22);
    }
public function isCancer()
    {
        return ($this->month === self::MONTH_JUNE) && ($this->day >= 22) && ($this->day <= 30) || ($this->month === self::MONTH_JULY) && ($this->day <= 22);
    }
public function isCancer ( ) { return ( $ this -> month === self :: MONTH_JUNE ) && ( $ this -> day >= 22 ) && ( $ this -> day <= 30 ) || ( $ this -> month === self :: MONTH_JULY ) && ( $ this -> day <= 22 ) ; }
Checks whether the sign is Cancer

@return boolean
Checks whether the sign is Cancer