php读取证书信息

这些都是php自带函数

echo $_SERVER["CERT_FLAGS"]."";//使用证书的标识,1或0
echo $_SERVER["CERT_ISSUER"]."";//颁发机构
echo $_SERV R["CERT_SERIALNUMBER"]."";//序列号
echo $_SERVER["CERT_SUBJECT"]."";//主题
echo $_SERVER["HTTPS"]."";//https开关,on或off
echo $_SERVER["HTTPS_KEYSIZE"]."";//密钥长度,128
echo $_SERVER["HTTPS_SECRETKEYSIZE"]."";//加密强度,1024
echo $_SERVER["HTTPS_SERVER_ISSUER"]."";//服务器证书颁发机构
echo $_SERVER["HTTPS_SERVER_SUBJECT"]."";//服务器证书主题