instant client安装
https://www.oracle.com/database/technologies/instant-client/downloads.html

instantclient-basic-linux.x64-11.2.0.4.0.zip
instantclient-sdk-linux.x64-11.2.0.4.0.zip

下载解压　添加到PATH

extension=php_pdo_oci.dll

https://blog.csdn.net/alexander_phper/article/details/50972326

php扩展包
http://pecl.php.net/package/oci8
https://www.cnblogs.com/myBlogInWork/p/8657125.html