yes, I have an oracle 7.3.3 server running on Digital Unix OSF1. I can connect from apache (Win98) and IIS (Win2K) using the extensions php_oracle.dll and php_oci8.dll with php 4.0.3 pl1.
I have a linux box (SuSe 6.3) with an oracle 8i 8.1.5, apache 1.3.12 and php 4.03 pl1. Using the client from linux i can connect to the oracle 7.3.3 server too.