1. 下載適用于Oracle10G的 Instant Client Package 32Bit,instantclient-basic-win32-10.2.0.5.zip，（如果你是64Bit系統(tǒng)，下載）,解壓。
2.如果不修改系統(tǒng)PATH，那么解壓出來的9個(gè)文件，全部放到php的bin目錄下，也就是含有php二進(jìn)制文件的那個(gè)目錄下，如果有潔癖，那就改個(gè)PATH。
3.在IIS的FASTCGI下面選擇環(huán)境變量編輯 添加如下三個(gè)變量
4.在php.ini里面把php_oci8.dll擴(kuò)展啟用
5.結(jié)束掉老的php-cgi進(jìn)程重新訪問就可以了
番外：
PHP官方對于Oracle的連接時(shí)候的一些變量有說明，這里的環(huán)境變量，除了ORACLE_HOME之類的也不是必須的，官方都有對應(yīng)的寫法，可以看說明
| NAME | PURPOSE |
|---|---|
| ORACLE_HOME | Contains the directory of the full Oracle Database software. Do not set this when using Oracle Instant Client as it is unnecessary and may cause installation problems. |
| ORACLE_SID | Contains the name of the database on the local machine to be connected to. There is no need to set this if you using Oracle Instant Client, or always pass the connection parameter tooci_connect(). |
| LD_LIBRARY_PATH | Set this (or its platform equivalent, such as DYLD_LIBRARY_PATH, LIBPATH, or SHLIB_PATH) to the location of the Oracle libraries, for example $ORACLE_HOME/lib or/usr/lib/oracle/11.1/client/lib. This variable is not needed if the libraries are located by a different search mechanism, such as with ldconfig or with LD_PRELOAD. |
| NLS_LANG | This is the primary variable for setting the character set and globalization information used by the Oracle libraries. |
| ORA_SDTZ | Sets the Oracle session timezone. |
| TNS_ADMIN | Contains the directory where the Oracle Net Services configuration files such as tnsnames.ora and sqlnet.ora are kept. Not needed if the oci_connect() connection string uses the Easy Connect naming syntax such as localhost/XE. Not needed if the network configuration files are in one of the default locations such as $ORACLE_HOME/network/admin or /etc. |
Less frequently used Oracle environment variables include TWO_TASK, ORA_TZFILE, and the various Oracle globalization settings like NLS* and the ORA_NLS_* variables.
oci_connect的時(shí)候，如果使用完整的TNS語法或者簡略的寫法，比如8.8.8.8/abc的時(shí)候，TNS_ADMIN也不是必須的。具體的還是看官方文檔吧，不多說了。
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