EasyWeChatとPHPはWeChatアプレットのユーザーログイン機能を実現します

wx.login({
  success: function (res) {
    if (res.code) {
      // 将code发送给后端服务器进行后续操作
    } else {
      console.log('登录失败！' + res.errMsg)
    }
  }
})

require_once 'vendor/autoload.php';

use EasyWeChatFactory;

$options = [
    'app_id' => 'your-app-id',
    'secret' => 'your-secret',
    'token' => 'your-token',
];

$app = Factory::miniProgram($options);

$code = $_GET['code'];

$result = $app->auth->session($code);

$openid = $result['openid'];
$sessionKey = $result['session_key'];

// 将用户OpenID保存到数据库中
// 这里使用PDO进行数据库操作，你也可以使用其他数据库操作方法
$pdo = new PDO('mysql:host=localhost;dbname=your-database', 'username', 'password');

$statement = $pdo->prepare('INSERT INTO users (openid) VALUES (:openid)');
$statement->execute([':openid' => $openid]);

// 生成用户标识token
$token = md5(uniqid(rand(), true));
$statement = $pdo->prepare('INSERT INTO tokens (openid, token) VALUES (:openid, :token)');
$statement->execute([':openid' => $openid, ':token' => $token]);

// 将token返回给小程序
echo json_encode(['token' => $token]);