(PHP 4, PHP 5, PHP 7)
dba_replace — Replace or insert entry
$key
   , string $value
   , resource $handle
   )
   dba_replace() replaces or inserts the entry described
   with key and value into the
   database specified by handle.
  
keyThe key of the entry to be replaced.
valueThe value to be replaced.
handleThe database handler, returned by dba_open() or dba_popen().
   成功时返回 TRUE, 或者在失败时返回 FALSE。