Client lib v. 7.3 to access 8.0 db server. Compatible ?

Hello,
I mainly use PHP to access my database. The PHP in the server is compiled with
postgreSQL client lib v. 7.3. I am planning to upgrade my database server (on
other machine) to version 8.0. Do I need to recompile PHP to use 8.0 client,
or is it compatible ? I would rather not recompile my PHP, since it's
actually ship with the linux distro I'm using (RHEL 3).

Thanks in advance for any info.

RDB.
--
Reuben D. Budiardja
Dept. Physics and Astronomy
University of Tennesse, Knoxville, TN