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

本地Windows环境， phpstudy 集成 php7 后，出现错误提示：cURL error 60: SSL certificate problem: unable to get local issuer certificate

查询问题：SSL CA证书配置缺失导致。

1、从CURL 官网下载CA 证书（cacert.pem）

　　可 选择下载：https://curl.haxx.se/docs/caextract.html

　　或 直接下载：https://curl.haxx.se/ca/cacert.pem

2、找到 phpstudy 安装路径，对应php版本包

　　例 安装路径下 php包：F:\phpstudy_pro\Extensions\php\php7.3.4nts\

　　将下载的cacert.pem文件，放入 \extras\ssl\ 文件夹下

3、修改配置 php.ini 文件

　　启用openssl, curl扩展

extension=curl
extension=openssl

　　配置CA 证书存放位置

[curl]
; A default value for the CURLOPT_CAINFO option. This is required to be an
; absolute path.
curl.cainfo = "F:\phpstudy_pro\Extensions\php\php7.3.4nts\extras\ssl\cacert.pem"

[openssl]
; The location of a Certificate Authority (CA) file on the local filesystem
; to use when verifying the identity of SSL/TLS peers. Most users should
; not specify a value for this directive as PHP will attempt to use the
; OS-managed cert stores in its absence. If specified, this value may still
; be overridden on a per-stream basis via the "cafile" SSL stream context
; option.
openssl.cafile="F:\phpstudy_pro\Extensions\php\php7.3.4nts\extras\ssl\cacert.pem"

; If openssl.cafile is not specified or if the CA file is not found, the
; directory pointed to by openssl.capath is searched for a suitable
; certificate. This value must be a correctly hashed certificate directory.
; Most users should not specify a value for this directive as PHP will
; attempt to use the OS-managed cert stores in its absence. If specified,
; this value may still be overridden on a per-stream basis via the "capath"
; SSL stream context option.
openssl.capath="F:\phpstudy_pro\Extensions\php\php7.3.4nts\extras\ssl"