In what ways can the PHP.ini file be configured to enable Oracle functionality in PHP?
To enable Oracle functionality in PHP, the PHP.ini file needs to be configured to include the necessary Oracle extensions. This can be done by uncommenting the relevant lines in the PHP.ini file to enable the OCI8 extension and specifying the Oracle Instant Client libraries. Additionally, the Oracle database connection parameters should be set in the PHP code using the oci_connect() function.
extension=oci8
```
```php
oci_connect("username", "password", "localhost/XE");