<?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 — Check whether key exists
$key, resource $dba): bool
dba_exists() checks whether the specified
key exists in the database.
keyThe key the check is performed for.
dbaThe database handler, returned by dba_open() or dba_popen().
Returns true if the key exists, false otherwise.
<?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);
?>