(PHP 3 >= 3.0.8, PHP 4, PHP 5)
dba_replace() replaces or inserts the entry described with key and value into the database specified by handle.
The key of the entry to be replaced.
The value to be replaced.
The database handler, returned by dba_open() or dba_popen().
如果成功则返回 TRUE,失败则返回 FALSE。