using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Admin.NET.Core
{
    public class MarkPhoneUtil
    {
        /// <summary>
        /// 手机号中间四位用*号隐藏
        /// </summary>
        /// <param name="phoneNumber"></param>
        /// <returns></returns>
        public static string MaskPhoneNumber(string phoneNumber)
        {
            if (string.IsNullOrEmpty(phoneNumber) || phoneNumber.Length != 11)
            {
                return phoneNumber;
            }
            return phoneNumber.Substring(0, 3) + "****" + phoneNumber.Substring(7);
        }
    }

}