How to get CA pem file content using PHP in server side

问题

Anyone please tell me how we get the CA pem file content which send through PHP CURL CURLOPT_CAINFO or through postman, in server side using PHP

Please check below code

CURL *curl = curl_easy_init();
if(curl) {
  curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/");
  curl_easy_setopt(curl, CURLOPT_CAINFO, "/etc/certs/cabundle.pem");
  ret = curl_easy_perform(curl);
  curl_easy_cleanup(curl);
}

In above code cabundle.pem contains certificate content. I need to fetch that content in end point ie.https://example.com/ server using PHP code.

Is that possible?

来源：https://stackoverflow.com/questions/60758515/how-to-get-ca-pem-file-content-using-php-in-server-side