Fix cURL error 60 "SSL certificate problem: unable to get local issuer certificate" in PHP

1. Download the latest PEM file from here.
2. Put it in PHP's SSL directory e.g. C:\Program Files\PHP\v8.0\extras\ssl\
3. Edit your PHP configuration file (php.ini) - in the curl section, uncomment line and add the path to the PEM file e.g.:
   
   curl.cainfo = "C:\Program Files\PHP\v8.0\extras\ssl\cacert-2022-07-19.pem"
   
   
4. Restart PHP.