How PHP saves user state using binary

Saving user status is a very common requirement. The general way to save user status is to create multiple fields in the database table to store the corresponding user status. For example, to save whether the user has bound a mobile phone number and QQ, You need 2 fields (mobile, qq) to save. This article mainly shares an example of PHP using binary to save user status. It has a good reference value and I hope it will be helpful to everyone. Let’s follow the editor to take a look, I hope it can help everyone.

If you use binary to save user status, you only need 1 field (status) to save multiple user statuses.

Of course, there are some disadvantages to using binary to save. For example, detailed information cannot be stored and can only be used to determine status, and the readability in the database is also relatively poor. Below is a relatively simple Demo.

Code

##

<?php
/**
 * 使用二进制来保存用户状态
 */
//首先定义4个用户状态
define(&#39;MOBILE&#39;, 1); //手机号绑定
define(&#39;EMAIL&#39;, 2);  //邮箱绑定
define(&#39;WECHAT&#39;, 4); //微信绑定
define(&#39;QQ&#39;, 8);   //QQ绑定
//模拟用户类
class User {
  public $user_name = "";
  public $status = 0; //用来保存用户状态
  function __construct($user_name, $status) {
    $this->user_name = $user_name;
    $this->status = $status;
  }
}
//new一个测试用户
$test_user = new User("test_user", 0);
//先判断用户是否绑定了手机号
if (($test_user->status & MOBILE) == MOBILE)
  echo "first:该用户已经绑定手机号,用户状态是:" . $test_user->status . "</br>";
else
  echo "first:该用户没有绑定手机号,用户状态是:" . $test_user->status . "</br>";
//接着该用户去绑定了手机号 微信 和 QQ
$test_user->status = MOBILE | WECHAT | QQ;
//再判断一下用户是否绑定了手机号
if (($test_user->status & MOBILE) == MOBILE)
  echo "second:该用户已经绑定手机号,用户状态是:" . $test_user->status . "</br>";
else
  echo "second:该用户没有绑定手机号,用户状态是:" . $test_user->status . "</br>";
//再判断一下用户有没有绑定邮箱
if (($test_user->status & EMAIL) == EMAIL)
  echo "third:该用户已经绑定邮箱,用户状态是:" . $test_user->status . "</br>";
else
  echo "third:该用户没有绑定邮箱,用户状态是:" . $test_user->status . "</br>";
//然后这个用户解除了手机号绑定
$test_user->status = ($test_user->status & (~MOBILE));
//再次判断用户是否绑定了手机号
if (($test_user->status & MOBILE) == MOBILE)
  echo "fourth:该用户已经绑定手机号,用户状态是:" . $test_user->status . "</br>";
else
  echo "fourth:该用户没有绑定手机号,用户状态是:" . $test_user->status . "</br>";

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