I have followed all the steps to install APACHE1.3.12/PHP4 Release2 modules version on Linux (Redhat 6.1). My purpose is to access an ORACLE 8.1.5 database from a web server.
I get a successfull result when I build/install  PHP with APXS support.My option are as follow :
./configure --prefix=/home/php/Packages/php-4.ORC2
--with-apxs=/home/apache/Packages/apache_1.3.12/bin/apxs --enable-tracks-vars --enable-debug --enable-trans-sid 
--with-oci8=/home/oracle

After I added the LoadModule on the HTTPD.CONF file, APACHE restart properly.

Despite, I can't connect to my ODBC database, using OCI8 functions.
The error message returned is "Fatal error : call to undefined funtion : ocilogon() in ..."

When I use ldd with libphp4.so, I get the following result :

ldd ./home/apache/Packages/apache_1.3.12/libexec/libphp4.so
	libgdbm.so.2 => /usr/lib/libgdbm.so.2 (0x40118000)
	libpam.so.0 => /lib/libpam.so.0 (0x4011f000)
	libdl.so.2 => /lib/libdl.so.2 (0x40127000)
	libclntsh.so.8.0 => /usr/lib/libclntsh.so.8.0 (0x4012a000)
	libpthread.so.0 => /lib/libpthread.so.0 (0x40632000)
	libm.so.6 => /lib/libm.so.6 (0x40643000)
	libttf.so.2 => /usr/lib/libttf.so.2 (0x4065f000)
	libgd.so.1 => /usr/lib/libgd.so.1 (0x40675000)
	libresolv.so.2 => /lib/libresolv.so.2 (0x406ab000)
	libcrypt.so.1 => /lib/libcrypt.so.1 (0x406ba000)
	libnsl.so.1 => /lib/libnsl.so.1 (0x406e7000)
	libc.so.6 => /lib/libc.so.6 (0x406fd000)
	/lib/ld-linux.so.2 => /lib/ld-linux.so.2 (0x80000000)