获取星座函数

if (!function_exists('get_zodiac_sign')) {


    /**
     * 根据月、日获取星座
     *
     * @param unknown $month 月
     * @param unknown $day 日
     * @return boolean|multitype:
     */
    function get_zodiac_sign($month, $day)
    {
        // 检查参数有效性
        if ($month < 1 || $month > 12 || $day < 1 || $day > 31) {
            return false;
        }

        // 星座名称以及开始日期
        $signs = array(
            array("20" => "水瓶座"),
            array("19" => "双鱼座"),
            array("21" => "白羊座"),
            array("20" => "金牛座"),
            array("21" => "双子座"),
            array("22" => "巨蟹座"),
            array("23" => "狮子座"),
            array("23" => "处女座"),
            array("23" => "天秤座"),
            array("24" => "天蝎座"),
            array("22" => "射手座"),
            array("22" => "摩羯座")
        );
        list($sign_start, $sign_name) = each($signs[(int)$month - 1]);
        if ($day < $sign_start) {
            list($sign_start, $sign_name) = each($signs[($month - 2 < 0) ? $month = 11 : $month -= 2]);
        }
        return $sign_name;
    }
}