dba_exists

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

dba_exists — Check whether key exists

Description

dba_exists(string|array $key, Dba\Connection $dba): bool

dba_exists() checks whether the specified key exists in the database.

Parameters

key: The key the check is performed for.
dba: A Dba\Connection instance, returned by dba_open() or dba_popen().

Return Values

Returns true if the key exists, false otherwise.

Changelog

Version	Description
8.4.0	The `dba` parameter expects a Dba\Connection instance now; previously, a valid `dba` resource was expected.

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User Contributed Notes 1 note

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frenzy dot ivan at gmail dot com ¶

15 years ago

<?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);



?>