In order to enable the bundled dbase library and to use these functions, you must compile PHP with the --enable-dbase option.
moodsey211 at gmail dot com (2011-02-18 00:18:08)
if you want to compile dbase as an extension, the latest php source does not include the dbase folder in the ext folder. Instead you would need to download it from here: http://pecl.php.net/package/dbase