<?php
$index = 4;
$id = dba_open("frenzy.db", "w", "flatfile");
if(!$id) exit ("Some error...");
if(dba_exists($index, $id)) exit ("This key is using");
dba_close($id);
?>(PHP 4, PHP 5, PHP 7, PHP 8)
dba_exists — Verifica si una clave DBA existe
   dba_exists() verifica si la clave
   key existe en la base identificada
   por handle.
  
keyLa clave a verificar.
dbaA Dba\Connection instance, returned by dba_open() or dba_popen().
| Versión | Descripción | 
|---|---|
| 8.4.0 | The dbaparameter expects a Dba\Connection
  instance now; previously, a validdbaresource was expected. | 
<?php
$index = 4;
$id = dba_open("frenzy.db", "w", "flatfile");
if(!$id) exit ("Some error...");
if(dba_exists($index, $id)) exit ("This key is using");
dba_close($id);
?>