dba_firstkey
(PHP 4, PHP 5, PHP 7)
dba_firstkey — Fetch first key
说明
dba_firstkey (
resource
$handle
) :
string
dba_firstkey() returns the first key of the database and resets the internal key pointer. This permits a linear search through the whole database.
返回值
Returns the key on success 或者在失败时返回 FALSE
.
参见
- dba_nextkey() - Fetch next key
- dba_key_split() - Splits a key in string representation into array representation
- Example 2 in the DBA examples