(PHP 4, PHP 5, PHP 7, PHP 8)
dba_firstkey — Fetch first key
dba_firstkey() returns the first key of the database and resets the internal key pointer. This permits a linear search through the whole database.
Returns the key on success 或者在失败时返回 false
.
版本 | 说明 |
---|---|
8.4.0 |
The dba parameter expects a Dba\Connection
instance now; previously, a valid dba resource was expected.
|