If you just add the schema, they should only show up in cn=Subschema. You have to actually add/modify the data in the directory, placing values in the new attributes in some entries, before the attributes will start to appear in OpenLDAP's slapcat/ldapsearch. (I can't speak to phpLdapAdmin.)
If you're wondering if they're getting loaded, I believe slapd -d config shows schema file parsing.
On Tue, 4 Dec 2007, Mike Eggleston wrote:
I have a custom schema for my site that has five fields. During the LISA '07 conference I had an idea for two more fields. I added the fields to the schema and restarted slapd. The fields do not appear in the ldif output from ldapsearch nor do the fields appear in phpLdapAdmin.
Do I need to slapcat and slapadd the entire database to get these new fields to appear?
openldap 2.3.30 fedora core 5
Mike