(PHP 4, PHP 5, PHP 7, PHP 8)
dba_sync — Synchronize database
$dba
dba_sync() synchronizes the database. This will probably trigger a physical write to the disk, if supported.
dba
The database handler, returned by dba_open() or dba_popen().
成功时返回 true， 或者在失败时返回 false。
true
false