1. Download CA bundle (cacert.pem) from http://curl.haxx.se/docs/caextract.html
2. Find a location on the server to store cacert.pem, similar to /opt/local/cacert.pem
3. Open the php configuration file php.ini
4. Add the configuration curl.ca_info = / opt/local/cacert.pem
5. Restart the server apache or nginx
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