I have the next lines uncommented (in my php.ini):
extension=php_oracle.dll
extension=php_oci8.dll
And I downloaded this file instan
Things to check:
You don't need to set LD_LIBRARY_PATH nor ORACLE_HOME. However, you need to add D:\instantclient_11_2 to the PATH environmental variable and restart the computer so changes apply.
Before configuring PHP, check that your Oracle client libraries actually work (for instance, try to connect with SQL Developer).
Comment out the extension=php_oracle.dll. It belongs to the old and deprecated Oracle extension.
Double check that the php_oci8.dll file is really at c:\php\ext\php_oci8.dll?