> Could anyone help me with the following;
>
> I am running Redhat 9, Firebird 1.5, Apache2 and PHP 4.3.3

Not that it would bother PHP/Interbase installation, but
which version of FB1.5.

> When installing the Interbase extension, I receive the following
> error message,
>
> ext/interbase/interbase.lo: file is not recognised: File truncated

? should that be .so ( I don't recognise .lo but may be wrong )

> Having looked through past posts in this newsgroup and around the
> web, I am unfortunately still receiving the same error message after
> trying some alternatives.

Have you checked out - 'Making PHP aware of Firebird'

I still have not got back to my SUSE box, but there are
plenty of people running PHP/Interbase on Linux, so it is
just a matter of kicking it in the right places :)

--
Lester Caine
-----------------------------
L.S.Caine Electronic Services