php judge constellation sun and the moon according to born

Foreword

Note: Because this function uses each () function, it does not support running under PHP7 + environment.

The function for determining the constellation, to complete the sun and the moon is determined by passing parameters, syntax.

getConstellation($month, $day)

1. $month：月(number)
2. $day：日(number)

code

Function only completed the operation, did not do much to determine the parameters and constraints.

function getConstellation($month, $day){//参数为 number 类型

# 1.检查参数有效性(月日必须大于1且小于31)
if(($month < 1 || $month > 12) || ($day < 1 || $day > 31)) return false;//如不符合直接返回false退函数

# 2.星座名称及开始日期映射集合
$constellations = [
    ['20' => '水瓶座'], ['19' => '双鱼座'], ['21' => '白羊座'], ['20' => '金牛座'],
    ['21' => '双子座'], ['22' => '巨蟹座'], ['23' => '狮子座'], ['23' => '处女座'],
    ['23' => '天秤座'], ['24' => '天蝎座'], ['22' => '射手座'], ['22' => '魔羯座']
];

# 3.通过list()接收星座映射集合的键与值,然后进行判断(它的值由每个each()取出)
/*
* @ list() - $constellation_key: 接收键(key)
* @ list() - $constellation_value: 接收值(value)
* @ echo(): 提供键与值(抽取星座映射集合的键与值)
*/
list($constellation_key, $constellation_value) = each($constellations[(int)$month - 1]);
    if($day < $constellation_key){//[日]小于当前键(key)则进行深度判断
    	//再次判断,并接收最后的键与值(即对应星座键与值)
        list($constellation_key, $constellation_value) = 
        each($constellations[($month - 2 < 0) ? $month = 11 : $month -= 2]);
    }
    # 4.返回值(value)即可
    return $constellation_value;
}
// ! 注意: 在 PHP7+ 版本中 "each()" API 已被废弃,所以该函数只能在 PHP5+ 中使用。 
echo getConstellation(3,9);//双鱼座

It can be carried out according to the needs pruning.