如何用PHP开发微信公众号的会员管理系统

<?php
$appid = 'your_appid';
$appsecret = 'your_appsecret';

$code = $_GET['code']; // 用户授权时获取到的code
// 换取access_token
$url = 'https://api.weixin.qq.com/sns/oauth2/access_token?appid='.$appid.'&secret='.$appsecret.'&code='.$code.'&grant_type=authorization_code';
$result = file_get_contents($url);
$JSON = json_decode($result, true);
$access_token = $json['access_token'];
$openid = $json['openid'];

// 获取用户信息
$user_info_url = 'Https://api.weixin.qq.com/sns/userinfo?access_token='.$access_token.'&openid='.$openid.'&lang=zh_CN';
$user_info_result = file_get_contents($user_info_url);
$user_info = json_decode($user_info_result, true);

// 打印用户信息
echo '昵称：'.$user_info['nickname'].'<br>';
echo '性别：'.$user_info['sex'].'<br>';
echo '城市：'.$user_info['city'].'<br>';
echo '头像：<img src="'.$user_info['headimgurl'].'">';
?>

<?php
$appid = 'your_appid';
$appsecret = 'your_appsecret';

// 获取access_token
$access_token_url = 'https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid='.$appid.'&secret='.$appsecret;
$access_token_result = file_get_contents($access_token_url);
$access_token_json = json_decode($access_token_result, true);
$access_token = $access_token_json['access_token'];

// 添加会员
$add_member_url = 'https://api.weixin.qq.com/cgi-bin/membercard/activate?access_token='.$access_token;
$data = array(
  'init_bonus' => 100,
  'init_balance' => 1000,
  'membership_number' => '123456789',
  'code' => '123456789',
  'card_id' => 'your_card_id',
  'background_pic_url' => 'your_background_pic_url',
  'bonus_url' => 'your_bonus_url',
);
$data = json_encode($data);
$add_member_result = file_get_contents($add_member_url, false, stream_context_create(array(
  'http' => array(
    'method' => 'POST',
    'header' => 'Content-type: application/json',
    'content' => $data,
  ),
)));
$add_member_json = json_decode($add_member_result, true);
if ($add_member_json['errcode'] == 0) {
  echo '会员添加成功';
} else {
  echo '会员添加失败：'.$add_member_json['errmsg'];
}
?>