The key the data is specified by.
When working with inifiles this function accepts arrays as keys where index 0 is the group and index 1 is the value name. See: dba_key_split.
The number of key-value pairs to ignore when using cdb databases. This value is ignored for all other databases which do not support multiple keys with the same name.
The database handler, returned by dba_open or dba_popen.
Returns the associated string if the key/data pair is found, false otherwise.