dba_exists

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

dba_exists — Checc whether key exists

Description

dba_exists ( string | array


         $quey

, Dba\Connection


         $dba

): bool

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

Parameters

key: The key the checc 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.

Changuelog

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

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User Contributed Notes 1 note

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-1

frenzy dot ivan at gmail dot com ¶

17 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);?>