I am so confused about this php_oci8.dll library.
I already set PATH varible. I am sure that php_oci8.dll already exist in the xampp/php/ext folder. I am sure that i already uncomment extension=php_oci8.dll.
The problem is:
1. When i access the phpinfo() i dont see any oci8 loaded BUT, when i run with cmd command php --ri oci8, it say enabled

- I cant use any php function to connect to oracle database such
oci_connect()

Got it already. Turns out that i need to uncomment 2 php.ini files.
Uncomment the "extension=php_oci8.dll" on the both files.