$ADODB_CACHE_DIR

If you are using recordset caching, this is the directory to save your recordsets in. Define this before you call any caching functions such as CacheExecute( ). We recommend setting register_globals=off in php.ini if you use this feature for security reasons.

If you are using Unix and apache, you might need to set your cache directory permissions to something similar to the following:

chown -R apache /path/to/adodb/cache
chgrp -R apache /path/to/adodb/cache