dba_exists

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

dba_exists — Check whether key exists

Опис

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

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

Параметри

key: The key the check is performed for.
dba: The database handler, returned by dba_open() or dba_popen().

Значення, що повертаються

Returns true if the key exists, false otherwise.

Прогляньте також

dba_delete() - Delete DBA entry specified by key
dba_fetch() - Fetch data specified by key
dba_insert() - Insert entry
dba_replace() - Replace or insert entry

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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);



?>

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