PHP 8.1.0 Beta 1 available for testing

dba_exists

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

dba_existsCheck whether key exists

Description

dba_exists(string|array $key, resource $dba): bool

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

Parameters

key

The key the check is performed for.

dba

The database handler, returned by dba_open() or dba_popen().

Return Values

Returns true if the key exists, false otherwise.

See Also

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User Contributed Notes 1 note

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frenzy dot ivan at gmail dot com
12 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);

?>
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