PHP result::json示例

if ($_SESSION['wx_state'] != $state) {
    $rs = new result(WX_ACCESS_FAILED);
    echo $rs->json();
    exit;
}
$token_url = 'https://api.weixin.qq.com/sns/oauth2/access_token?appid=' . WX_APP_ID . '&secret=' . WX_APP_SECRET . '&code=' . $code . '&grant_type=authorization_code';
$token = json_decode(file_get_contents($token_url));
if (isset($token->errcode)) {
    $rs = new result(WX_TOKEN_FAILED, '[' . $token->errcode . ']: ' . $token->errmsg);
    echo $rs->json();
    exit;
}
/*
$user_info_url = 'https://api.weixin.qq.com/sns/userinfo?access_token=' . $token->access_token . '&openid=' . $token->openid . '&lang=zh_CN';
$user_info = json_decode(file_get_contents($user_info_url));
if (isset($user_info->errcode)) {
    $rs = new result(WX_USERINFO_FAILED, '[' . $token->errcode . ']: ' . $token->errmsg);
    echo $rs->json();
    exit();
}
*/
$openid = $token->openid;
if ($openid != null) {
    session_start();
    $_SESSION['open_id'] = $openid;
    echo "<script>location.href='index.php?un=1';</script>";
} else {
    $rs = new result(CREATE_USER_FAILED);
    echo $rs->json();
    exit;
}