This post will show you how to add multiple custom fields to Horde 5’s Address Book Application. Annoyingly the system only has an email field by default but there are several ways to easily enable a workEmail and HomeEmail field. There are many tutorials showing you how to do this but I couldn’t find an up to date tutorial on adding a custom field.
Any horde configuration file should not be edited! You should create a .local.php file instead and begin the file with <?php and then add any edits in there.
To enable the homeEmail and workEmail fields then create a new file called /var/www/turba/config/backends.local.php
Add the following (This is for SQL backend):