How to solve the php WeChat login 41001 error problem

php WeChat login 41001 error solution: 1. Check the log; 2. Remove the backslashes through stripslashes; 3. Decode through json_decode.

The operating environment of this article: windows7 system, PHP7.1 version, DELL G3 computer

How to solve php WeChat login 41001 error problem?

Mini program login decrypts user data encryptedData -41001: encodingAesKey illegal

The pitfalls encountered when doing mini program WeChat authorized login, the trouble is finally solved

Share now Here are some ideas for problem solving.

Question:

To do a WeChat authorized login for a mini program, first get the code, then get the session_key and open_id, then get the encryptedData, and pass it to the server for decryption. User information is obtained, but sometimes it succeeds and sometimes it returns -41001 error. Observing the logs, the session_key is obtained. What is the reason for this and how to solve it?

Solution:

The direction I initially considered was session_key expiration, because I didn’t know the expiration of session_key. After many tests, I found out that this was not the reason. As a result

I then started browsing various related blogs and searching for related problems, but finally found no solution. Maybe this problem is too inappropriate, so there are not many problems in this area

Finally, I started to look through the decrypted SDK source code, and then found that the reason for -41001 was to verify the length of session_key

if (strlen($this->sessionKey) != 24) {
 return ErrorCode::$IllegalAesKey;
}
//public static $IllegalAesKey = -41001;
//>-41001: encodingAesKey 非法

Finally, I looked at the log carefully (I also compared session_key in detail before, but I just saw that there was a value, a long string characters, and I don’t understand the deep meaning, I just know that some succeed and some fail, and I can’t find the pattern at all). Pay attention to the session_key length, and you can see the trick

PHP’s json string is sometimes added Use the backslash "\" to escape. When processing with PHP, you need to remove the backslash first, and then use the stripslashes() function in json_decode

$str = stripslashes($json); 
$arr = json_decode($str,true);

. The problem is solved!

*This is a small question, record it and give yourself a long memory

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