Discuss the problem of not being able to get the WeChat nickname in PHP

When developing WeChat official accounts or mini programs, we often encounter the need to obtain a WeChat nickname. However, sometimes we find that we are suddenly unable to obtain the WeChat user's nickname when using PHP. Why is this? This article will explore this problem and provide solutions.

Source of the problem

In WeChat public accounts or mini programs, users can use nicknames to display themselves. At the same time, this nickname is also an important parameter in the program. Therefore, when we need to obtain the WeChat nickname in the program, we can call it through the API provided by WeChat.

For example, the code to obtain the user's nickname in the WeChat public account is as follows:

// 通过微信 API 获取用户信息
$userInfo = $app->oauth->user()->getOriginal();

// 获取用户昵称
$nickname = $userInfo['nickname'];

However, sometimes, when we use this method to obtain the WeChat nickname, we will find that the returned nickname is empty. This prevents us from continuing to operate under this nickname.

Cause of the problem

So why does this problem occur? This is because the WeChat API will URL-encode the nickname when returning user information. If we do not decode it, we will get a meaningless string.

For example, assuming that the WeChat nickname is "PHP Master", after obtaining user information through the WeChat API, the returned data may be as follows:

{
    "openid": "xxxx",
    "nickname": "%50%48%50%3c%73%74%72%6f%6e%67%3e",
    "sex": 1,
    "language": "zh_CN",
    "city": "",
    "province": "",
    "country": "",
    "headimgurl": "",
    "privilege": []
}

You can see that the returned nickname is converted to A URL-encoded string. If we don't decode this string, we can't get the actual nickname.

Solution

The solution to this problem is very simple, just URL decode the nickname after getting it. In PHP, this can be done using the urldecode function.

The sample code is as follows:

// 通过微信 API 获取用户信息
$userInfo = $app->oauth->user()->getOriginal();

// 获取用户昵称并进行 URL 解码
$nickname = urldecode($userInfo['nickname']);

In this way, we can get the correct WeChat nickname.

Summary

When developing WeChat public accounts or mini programs, obtaining user information is a very important operation. However, because the nickname is URL-encoded in the WeChat API, sometimes the nickname cannot be obtained. Through the solution introduced in this article, we can decode the URL-encoded nickname and get the correct nickname, thereby ensuring the normal operation of the program.

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