身份证，手机号，姓名 脱敏格式化处理

<?php

class Mask
{
   
    const CARD = 1;     //身份证
    const PHONE = 2;    //手机号
    const NAME = 3;     //姓名

    /**
     * Notes: 脱敏格式化字符串
     * @param string $str 需要脱敏字符
     * @param $type 内容类型
     * @return mixed|string
     */
    private function formatData($str, $type)
    {
   
        $res = '';
        if (empty($str) || empty($type)) {
   
            return $res;
        }

        $len = strlen($str);
        switch ($type) {
   
            case self::CARD:
                $res = substr_replace($str, str_repeat('*', ($len - 8)), 6, $len - 8);
                break;
            case self::PHONE:
                $res = substr_replace($str, str_repeat('*', ($len - 7)), 7, $len - 7);
                break;
            case self::NAME:
                $res = $this->formatName($str);
                break;
            default :
                $res =