PHP Warning at startup while trying to load php_oci8.dll

There was a problem with 64bit version of instantclient. If you ever have the same issue, please install 32bit version of instantclient.

To be honest the easiest way is just to follow PROPER instructions: http://www.oracle.com/technetwork/articles/dsl/technote-php-instant-084410.html

I tried a lot of other advices and they all went really bad on me (not just because I used different bit version - also I copied the files everywhere following stupid advices and it was hard to correct it)