Horde configuration files are simply arrays:
<?php$conf['sitename'] = 'APP';$conf['debug_level'] = E_ALL;$conf['max_exec_time'] = 0;$conf['use_ssl'] = 2;$conf['umask'] = '077';$conf['compress_pages'] = true;?>
Actual configuration files are heavily commented to make them easier for end users to edit. There are also hopes of having them be parsed by a configuration file generation tool in the future.