Oracle 10g Instant Client
在Linux上启用PHP OCI8扩展要在Linux上添加Oracle连接，需要重新编译PHP。
在Linux上启用PHP OCI8扩展
要在Linux上添加Oracle连接，需要重新编译PHP。
1.下载并安装Apache
--enable-module=so so模块用来提供DSO支持的apachehe核心模块
--enable-shared=max 除了so以外的所有标准模块都编译成DSO模块(so不能被编译成DSO)
--enable-module=most 将一些常用的，不在缺省常用模块中的模块编译进Apache
2.下载并解压Instant Client
instantclient-odbc-linux32、instantclient-jdbc-linux32根据自己需要是否解压。
3.下载并安装php
4.编辑/usr/local/apache/conf/httpd.conf 并添加：
5.测试OCI8支持
浏览器页面应包含一个显示“OCI8 Support enabled”的“oci8”部分。
6.测试连接Oracle
(A)sqlplus
(B)php
在FC3下通过。
在Windows上启用PHP OCI8扩展
1.从OTN的Instant Client页面下载用于Windows的Instant Client Basic程序包。
2.创建一个子目录(例如，c:\instantclient10_1)，然后从压缩文件中复制以下库：
oraociei10.dll、orannzsbb10.dll、oci.dll
要使用PHP老版本的“oracle”扩展(在php.ini中使用“extension=php_oracle.dll”启用)，则复制ociw32.dll而非 oci.dll。
3.将c:\instantclient10_1添加到PATH中(位于其他Oracle目录之前)。
如果使用了tnsnames.ora文件定义Oracle Net服务名称，则将tnsnames.ora复制到c:\instantclient10_1，并将用户环境变量TNS_ADMIN设置为c:\instantclient10_1。也可以在用户环境变量LOCAL中定义默认的服务名称。
设置必要的Oracle全球化语言环境变量，如NLS_LANG。如果没有设置，则使用默认的本地环境。有关更多详细信息，请参见Oracle PHP应用程序全球化概述。
无需设置不必要的Oracle变量，如ORACLE_HOME和ORACLE_SID。
4.编辑php.ini，并不要将OCI8扩展设为注释：
extension=php_oci8.dll
将extension_dir指令设置为完整的PHP扩展DLL路径。在PHP 4中，DLL位于PHP软件的“extensions”子目录中。在PHP 5中，它们位于“ext”中。
5.重新启动Apache。
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