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CentOS服务器上已有相关环境：ngxin、php8.3。需要安装pdo_oci和oci8。
下边记录一下详细步骤

安装oracle客户端

Version 23.4.0.0.0 (Requires glibc 2.14)

https://download.oracle.com/otn_software/linux/instantclient/2340000/instantclient-basic-linux.x64-23.4.0.24.05.zip
https://download.oracle.com/otn_software/linux/instantclient/2340000/instantclient-sdk-linux.x64-23.4.0.24.05.zip

选择这上面这两个安装包，下载到/usr/local/src 然后解压：

unzip instantclient-basic-linux.x64-23.4.0.24.05.zip
unzip instantclient-sdk-linux.x64-23.4.0.24.05.zip

然后进入到解压后的目录：cd instantclient_11_2/将下面的三个文件作一下连接

ln -s libnnz11.so libnnz.so
ln -s libclntsh.so.11.1 libclntsh.so
ln -s libocci.so.11.1 libocci.so

然后将解压后的目录移动到 /usr/local/lib目录下，改名为‘instantclient'

mv ./instantclient_11_2   /usr/local/lib/instantclient

安装oci8扩展

进入php的源码安装包：cd /usr/local/src/php-8.3/ext/oci8/

/usr/local/php/bin/phpize
./configure --with-php-config=/usr/local/php/bin/php-config --with-oci8=shared,instantclient,/usr/local/lib/instantclient
make && make install

进入cd /usr/local/php/lib/php/extensions/no-debug-zts-20160303/查看有oci8.so这个文件说明安装成功
在php.ini配置中添加一句extension=oci8.so

安装pdo_oci扩展

进入php的源码安装包：cd /usr/local/src/php-7.1.25/ext/pdo_oci

/usr/local/php/bin/phpize
./configure --with-php-config=/usr/local/php/bin/php-config --with-pdo-oci=instantclient,/usr/local/lib/instantclient
make && make install

进入cd /usr/local/php/lib/php/extensions/no-debug-zts-20160303/查看有pdo_oci.so这个文件说明安装成功
在php.ini配置中添加一句extension=pdo_oci.so
查看phpinfo如果有oci8和pdo_oci的话就添加成功了