安装很简单
rpm -Uvh oracle-instantclient-basic-10.2.0.3-1.i386.rpm
rpm -Uvh oracle-instantclient-devel-10.2.0.3-1.i386.rpm
安装完成后，可以在/usr/lib/oracle 看到安装的库文件
之后需要重新编译php，加上--with-oci8=share,instantclient,/usr/lib/oracle/10.2.0.3/client/lib参数，如下：
./configure --with-mysql --with-apxs2=/usr/local/apache2/bin/apxs--with-oci8=share,instantclient,/usr/lib/oracle/10.2.0.3/client/lib
测试代码：
< php
$conn = OCILogon('username','password','192.168.1.2/test');
if (!$conn) {
$e = oci_error();
print htmlentities($e['message']);
exit;
}
else
{
echo "Successfully connected to Oracle!\n";
ocilogoff($conn);
}
>
一些相关链接：
http://www.oracle.com/technology/pub/notes/technote_php_instant.html
还有就是php中oci的编译参数，可以看php原代码目录中ext/oci8的README，里面有解释。