核心代码：

复制代码 代码如下:

<?php

/*

* 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" => "宝瓶座"),

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;

}//函数结束

?>