<?php

/**
 * 关于身份证的处理类
 */
class IdCard
{

    /**
     *  根据身份证号码获取性别
     *
     * @param string $number 身份证号码
     * @return int $sex 性别 1男 2女 0未知
     */
    public static function GetSex($number)
    {
        if (empty($number)) return null;
        $sex = (int)substr($number, 16, 1);
        return $sex % 2 === 0 ? '女' : '男';
    }

    /**
     *  根据身份证号码获取生日
     *
     * @param string $number 身份证号码
     * @return string
     */
    public static function GetBirthday($number)
    {
        if (empty($number)) return null;
        $bir = substr($number, 6, 8);
        $year = (int)substr($bir, 0, 4);
        $month = (int)substr($bir, 4, 2);
        $day = (int)substr($bir, 6, 2);
        $birthday = $year . "-" . $month . "-" . $day;
        return $birthday;
    }

    /**
     * 身份证号码中提取年龄
     *
     * @param $number
     * @return integer
     */
    public static function GetAge($number)
    {
        if (empty($number)) return 0;
        $date = strtotime(substr($number, 6, 8));
        $today = strtotime('today');
        $diff = floor(($today - $date) / 86400 / 365);
        $age = strtotime(substr($number, 6, 8) . ' +' . $diff . 'years') > $today ? ($diff + 1) : $diff;
        return $age;
    }

    /**
     * 判断字符串是否是身份证号
     *
     * @param $number | 身份证号码
     * @return array
     */
    public static function isIdCard($number)
    {
        try {

            $vCity = array(
                '11','12','13','14','15','21','22',
                '23','31','32','33','34','35','36',
                '37','41','42','43','44','45','46',
                '50','51','52','53','54','61','62',
                '63','64','65','71','81','82','91'
            );
            //中国大陆，香港，澳门，

            //中国大陆
            #   /^([\d]{17}[xX\d]|[\d]{15})$/

            //香港身份证正则
            #   ^((\s?[A-Za-z])|([A-Za-z]{2}))\d{6}((\([0-9aA]\))|([0-9aA]))$

            //台湾
            #   /^[a-zA-Z][0-9]{9}$/

            //澳门
            #   /^[1|5|7][0-9]{6}\([0-9Aa]\)/

            if (!preg_match('/^([\d]{17}[xX\d]|[\d]{15})$/', $number)) {
                return ['code' => 400,'msg' => '身份证号码不正确，请修改身份证号码'];
            }
            if (!in_array(substr($number, 0, 2), $vCity)) {
                return ['code' => 400,'msg' => '身份证号码不正确，请修改身份证号码'];
            }
            $vStr = preg_replace('/[xX]$/i', 'a', $number);
            $vLength = strlen($vStr);
            if ($vLength == 18) {
                $vBirthday = substr($vStr, 6, 4) . '-' . substr($vStr, 10, 2) . '-' . substr($vStr, 12, 2);
            } else {
                $vBirthday = '19' . substr($vStr, 6, 2) . '-' . substr($vStr, 8, 2) . '-' . substr($vStr, 10, 2);
            }
            if (date('Y-m-d', strtotime($vBirthday)) != $vBirthday) {
                return ['code' => 400,'msg' => '身份证号码不正确，请修改身份证号码'];
            }
            if ($vLength == 18) {
                $vSum = 0;
                for ($i = 17 ; $i >= 0 ; $i--) {
                    $vSubStr = substr($vStr, 17 - $i, 1);
                    $vSum += (pow(2, $i) % 11) * (($vSubStr == 'a') ? 10 : intval($vSubStr , 11));
                }
                if($vSum % 11 != 1) {
                    return ['code' => 400,'msg' => '身份证号码不正确，请修改身份证号码'];
                }
            }
            return ['code' => 0,'msg' => ''];
        } catch (\Exception $e) {
            return ['code' => 400,'msg' => '身份证号码不正确，请修改身份证号码'];
        }
    }

    /**
     * 根据身份证号，返回对应的生肖
     *
     * @param string $number 身份证号码
     * @return string
     */
    public static function GetZodiac($number)
    {
        if (empty($number)) return null;
        $start = 1901;
        $end = (int)substr($number, 6, 4);
        $x = ($start - $end) % 12;
        $val = '';
        if ($x == 1 || $x == -11) $val = '鼠';
        if ($x == 0) $val = '牛';
        if ($x == 11 || $x == -1) $val = '虎';
        if ($x == 10 || $x == -2) $val = '兔';
        if ($x == 9 || $x == -3) $val = '龙';
        if ($x == 8 || $x == -4) $val = '蛇';
        if ($x == 7 || $x == -5) $val = '马';
        if ($x == 6 || $x == -6) $val = '羊';
        if ($x == 5 || $x == -7) $val = '猴';
        if ($x == 4 || $x == -8) $val = '鸡';
        if ($x == 3 || $x == -9) $val = '狗';
        if ($x == 2 || $x == -10) $val = '猪';
        return $val;
    }


    /**
     *  根据身份证号，返回对应的星座
     *
     * @param string $number 身份证号码
     * @return string
     */
    public static function GetStarSign($number)
    {
        if (empty($number)) return null;
        $b = substr($number, 10, 4);
        $m = (int)substr($b, 0, 2);
        $d = (int)substr($b, 2);
        $val = '';
        if (($m == 1 && $d <= 21) || ($m == 2 && $d <= 19)) {
            $val = "水瓶座";
        } else if (($m == 2 && $d > 20) || ($m == 3 && $d <= 20)) {
            $val = "双鱼座";
        } else if (($m == 3 && $d > 20) || ($m == 4 && $d <= 20)) {
            $val = "白羊座";
        } else if (($m == 4 && $d > 20) || ($m == 5 && $d <= 21)) {
            $val = "金牛座";
        } else if (($m == 5 && $d > 21) || ($m == 6 && $d <= 21)) {
            $val = "双子座";
        } else if (($m == 6 && $d > 21) || ($m == 7 && $d <= 22)) {
            $val = "巨蟹座";
        } else if (($m == 7 && $d > 22) || ($m == 8 && $d <= 23)) {
            $val = "狮子座";
        } else if (($m == 8 && $d > 23) || ($m == 9 && $d <= 23)) {
            $val = "处女座";
        } else if (($m == 9 && $d > 23) || ($m == 10 && $d <= 23)) {
            $val = "天秤座";
        } else if (($m == 10 && $d > 23) || ($m == 11 && $d <= 22)) {
            $val = "天蝎座";
        } else if (($m == 11 && $d > 22) || ($m == 12 && $d <= 21)) {
            $val = "射手座";
        } else if (($m == 12 && $d > 21) || ($m == 1 && $d <= 20)) {
            $val = "魔羯座";
        }
        return $val;
    }

}