php - WeChat token keeps failing to verify

Question

WeChat token keeps failing to verify, I don’t know why,
The following is my code
if(isset( $_GET["echostr"])){

        echo $_GET['echostr'];
        exit;

}

Answer 1

That’s all the code?

Did you miss the verification code? Not all requests must return echostr.

Answer 2

Pfft, just post this, I can’t guess the code you wrote in the context

Answer 3

WeChat. Post the callback error code. Only then can we know. .