错误消息:

cURL error 60: SSL certificate problem: unable to get local issuer certificate (see http://curl.haxx.se/libcurl/c/libcurl-errors.html)

解决方法:
在php.ini中找到curl配置节点,修改成如下形式:

curl.cainfo = "D:/xampp/php/curl-ca/cacert.pem"

证书官网下载地址(另存为):

http://curl.haxx.se/ca/cacert.pem