public function isVirgo()
    {
        return ($this->month === self::MONTH_AUGUST) && ($this->day >= 23) && ($this->day <= 30) || ($this->month === self::MONTH_SEPTEMBER) && ($this->day <= 23);
    }
public function isVirgo()
    {
        return ($this->month === self::MONTH_AUGUST) && ($this->day >= 23) && ($this->day <= 30) || ($this->month === self::MONTH_SEPTEMBER) && ($this->day <= 23);
    }
public function isVirgo ( ) { return ( $ this -> month === self :: MONTH_AUGUST ) && ( $ this -> day >= 23 ) && ( $ this -> day <= 30 ) || ( $ this -> month === self :: MONTH_SEPTEMBER ) && ( $ this -> day <= 23 ) ; }
Checks whether the sign is Virgo

@return boolean
Checks whether the sign is Virgo