PHP: Hypertext Preprocessor (original) (raw)
dba_nextkey
(PHP 4, PHP 5, PHP 7, PHP 8)
dba_nextkey — Fetch next key
Description
dba_nextkey() returns the next key of the database and advances the internal key pointer.
Return Values
Returns the key on success or [false](reserved.constants.php#constant.false) on failure.
Changelog
| Version | Description |
|---|---|
| 8.4.0 | The dba parameter expects a Dba\Connection instance now; previously, a valid dba resource was expected. |
See Also
- dba_firstkey() - Fetch first key
- dba_key_split() - Splits a key in string representation into array representation
- Example 2 in the DBA examples
Found A Problem?
2 years ago
`It should be noted that it is not always safe to iterate through the database while changing it at the same time. For example:
key!==false;key!==false; key!==false;key=dba_nextkey($db)) { s=dbafetch(s=dba_fetch(s=dbafetch(key, $db); if (strlen($s)<10) { dba_delete($key, $db); } } ?>The above example will work fine with db4 handler, but not with gdbm. It is handler specific.`