string dba_delete(string key, int handle);dba_delete() deletes the entry specified by key from the database specified with handle.
key is the key of the entry which is deleted.
handle is a database handle returned by dba_open().
dba_delete() returns true or false, if the entry is deleted or not deleted, respectively.
See also: dba_exists() dba_fetch() dba_insert() dba_replace()