星座名称

/*
* 计算星座的函数 string get_zodiac_sign(string month, string day)
* 输入：月份，日期
* 输出：星座名称或者错误信息
*/

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;
}