摘要：中間兩個符號鏈接如果不建立，會加載失敗，提示找不到對應的文件。后面兩個符號鏈接如果不建立，今后在執行的過程中函數會拋異常。如果今后依然遇到其他失敗的信息，則以此類推，將目錄下的文件都在下建立符號鏈接即可。

先這樣安裝PHP：

brew install php71 --with-gmp --with-homebrew-curl --with-homebrew-libxml2 --with-imap --with-pear

然后去Oracle官網下載InstantClient相關的三個包，一個是Basic，一個是SQLPlus，還有一個是SDK：

instantclient-basic-macos.x64-11.2.0.3.0
instantclient-sqlplus-macos.x64-11.2.0.3.0
instantclient-sdk-macos.x64-11.2.0.3.0

下載后把這三個包里的內容都解壓放到一個目錄下，假設是/usr/local/instantclient，然后建立幾個符號鏈接，之后的編譯和最后生成的oci8.so文件會用到：

ln -s /usr/local/instantclient/libclntsh.dylib.11.1 /usr/local/instantclient/libclntsh.dylib
ln -s /usr/local/instantclient/libclntsh.dylib.11.1 /usr/local/lib/
ln -s /usr/local/instantclient/libnnz11.dylib /usr/local/lib/
ln -s /usr/local/instantclient/libocci.dylib.11.1 /usr/local/lib/
ln -s /usr/local/instantclient/libociei.dylib /usr/local/lib/

注意：其中第一個符號鏈接如果不建立，編譯的時候會出錯。中間兩個符號鏈接如果不建立，oci8.so會加載失敗，提示找不到對應的dylib文件。后面兩個符號鏈接如果不建立，今后在執行PHP的過程中oci_connect()函數會拋異常。如果今后依然遇到其他失敗的信息，則以此類推，將instantclient目錄下的dylib文件都在/usr/local/lib下建立符號鏈接即可。如果想簡單粗暴一些，那也可以把instantclient下的dylib文件都拷貝到/usr/local/lib下

然后安裝OCI8：

pecl install oci8

在提示輸入instantclient目錄位置的地方，輸入instantclient,/usr/local/instantclient，像這樣：

downloading oci8-2.1.3.tgz ...
Starting to download oci8-2.1.3.tgz (191,920 bytes)
.........................................done: 191,920 bytes
10 source files, building
running: phpize
Configuring for:
PHP Api Version:         20160303
Zend Module Api No:      20160303
Zend Extension Api No:   320160303
Please provide the path to the ORACLE_HOME directory. Use "instantclient,/path/to/instant/client/lib" if you"re compiling with Oracle Instant Client [autodetect] : instantclient,/usr/locall/instantclient

然后pecl就會編譯并安裝oci8.so文件。最后可能會遇到這個錯誤：

Build process completed successfully
Installing "/usr/local/Cellar/php71/7.1.1_12/lib/php/extensions/no-debug-non-zts-20160303/oci8.so"

Fatal error: Uncaught Error: Call to a member function getFilelist() on null in /usr/local/Cellar/php71/7.1.1_12/lib/php/PEAR/Command/Install.php:747
Stack trace:
#0 /usr/local/Cellar/php71/7.1.1_12/lib/php/PEAR/Command/Common.php(270): PEAR_Command_Install->doInstall("install", Array, Array)
#1 /usr/local/Cellar/php71/7.1.1_12/lib/php/pearcmd.php(316): PEAR_Command_Common->run("install", Array, Array)
#2 /usr/local/Cellar/php71/7.1.1_12/lib/php/peclcmd.php(31): require_once("/usr/local/Cell...")
#3 {main}
  thrown in /usr/local/Cellar/php71/7.1.1_12/lib/php/PEAR/Command/Install.php on line 747

不去管它，在/usr/local/etc/php/71/conf.d/目錄下手工建一個ext-oci8.ini文件：

[oci8]
extension="/usr/local/Cellar/php71/7.1.1_12/lib/php/extensions/no-debug-non-zts-20160303/oci8.so"

注意：extension后面一定要寫pecl安裝的oci8.so文件所在的絕對路徑，我之前寫了相對路徑，加載失敗

然后執行php -i | grep oci8來驗證是否安裝成功：

hongliang@macmini2012 ~ $ php -i | grep oci8
/usr/local/etc/php/7.1/conf.d/ext-oci8.ini,
oci8
oci8.connection_class => no value => no value
oci8.default_prefetch => 100 => 100
oci8.events => Off => Off
oci8.max_persistent => -1 => -1
oci8.old_oci_close_semantics => Off => Off
oci8.persistent_timeout => -1 => -1
oci8.ping_interval => 60 => 60
oci8.privileged_connect => Off => Off
oci8.statement_cache_size => 20 => 20

然后重啟php-fpm：

brew services restart php71

然后隨便寫一個php文件，輸出phpinfo()內容，如果看到oci8相關的參數，那就說明安裝成功了

另外，如果訪問Oracle數據發生could not generate unique server group name錯誤，則：

sudo vi /etc/hosts

然后加入：

127.0.0.1 hostname

Oracle要求本機的hostname必須可以正確指向127.0.0.1本機IP。如果不確定本機hostname是多少，則在命令行里敲hostname就可以了