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dba_nextkey

(PHP 4, PHP 5, PHP 7, PHP 8)

dba_nextkeyLee la clave DBA siguiente

Descripción

dba_nextkey(Dba\Connection $dba): string|false

dba_nextkey() devuelve la clave siguiente, en la base identificada por handle y incrementa el puntero de clave.

Parámetros

dba

A Dba\Connection instance, returned by dba_open() or dba_popen().

Valores devueltos

Devuelve la clave en caso de éxito o false si ocurre un error.

Historial de cambios

Versión Descripción
8.4.0 The dba parameter expects a Dba\Connection instance now; previously, a valid dba resource was expected.

Ver también

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User Contributed Notes 1 note

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phpnet at araxon dot sk
3 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:<?php$db=dba_open(...);// remove all values shorter than 10 charactersfor ($key=dba_firstkey($db); $key!==false; $key=dba_nextkey($db)) {    $s=dba_fetch($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.
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