(PHP 4, PHP 5)
dba_exists — Check whether key exists
$key
, resource $handle
)
dba_exists() checks whether the specified
key exists in the database.
key
The key the check is performed for.
handle
The database handler, returned by dba_open() or dba_popen().
Returns TRUE if the key exists, FALSE otherwise.
frenzy dot ivan at gmail dot com (2008-11-26 17:37:37)
<?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);
?>