(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 。