Editing Install Oracle client on Ubuntu

* Go to: http://www.oracle.com/technetwork/database/features/instant-client/index.html

* Scroll to Downloads and click on: Instant Client for Linux x86-64

* Accept the license agreement and find the x64.rpm files containing the following string:
** basic
** sqlplus
** devel

* Install the rpm to deb conversion tool:

'''apt-get install alien'''

* install the 3 packages in the following order:

'''alien -i oracle-instantclient12.1-sqlplus-12.1.0.2.0-1.x86_64.rpm'''

'''alien -i oracle-instantclient12.1-basic-12.1.0.2.0-1.x86_64.rpm'''

'''alien -i oracle-instantclient12.1-devel-12.1.0.2.0-1.x86_64.rpm'''

* The above file names will vary according to the version. The alien tool will generate and save the respective .deb file and install the package

* Install the required library:

'''apt-get install libaio1'''

* Add the oracle client library to linker path:

* Find the path for the Oracle libraries. It should be in /usr/lib/oracle/12.1/client

You are looking for a lib folder inside.

* create (or edit) the file /etc/ld.so.conf.d/oracle.conf

* Add the folder you found to the above file

* refresh the library paths:

'''ldconfig'''

* run the client and attempt to connect to the database:

'''sqlplus username/password@//dbhost:1521/SID'''

* Install the required package - OCI8 for PHP:

'''apt-get install pear php7.0-dev'''

* Attempt to install the PHP extension:

'''pecl install oci8'''

The install script will autodetect the oracle client path

* Add the extension=oci8.so line to your /etc/php/7.0/fpm/php.ini file

* Restart the FPM service:

'''service php7.0-fpm restart'''