msg cURL error 60 SSL certificate problem unable to get local issuer certificate see httpscurlhaxxselibcurlclibcurl-errorshtml for httpsapiweixinqqcomcgi-bintokengrant_type=client_credential&appid=wxa

This error is related to SSL certificate verification. The server you are trying to connect to (api.weixin.qq.com) is using an SSL certificate issued by a certificate authority that is not recognized by your local system. This can happen if the certificate is self-signed or if the certificate chain is not complete.

To resolve this issue, you can try one of the following solutions:

1. Add the root certificate of the certificate authority that issued the server's SSL certificate to your local certificate store.

2. Disable SSL certificate verification in your cURL request by adding the following option:

   curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, false);

   Note that this option can make your connection less secure, so use it with caution.

3. Contact the server administrator or the certificate authority to obtain a valid SSL certificate that is recognized by your local system