dba_fetch() gets the value associated with a given key from a db file. If the key and value can be found, the function returns the value. The function returns FALSE for all other cases.
To check whether a key exists
<?php $db_file = '/tmp/drinks.db'; $dba_handle = dba_open ($db_file, 'n', 'db2') or die ("File <i>$db_file</i> could not be opened, does not exist, or is not a db file."); $key = 'geeks'; $value = dba_fetch ($key, $dba_handle); if ($value !== FALSE) echo "The favorite drink of $key is $value."; else echo "Key <i>$key</i> could not be found in db file <i>$db_file</i>."; ?>
PHP Functions Essential Reference. Copyright © 2002 by New Riders Publishing (Authors: Zak Greant, Graeme Merrall, Torben Wilson, Brett Michlitsch). This material may be distributed only subject to the terms and conditions set forth in the Open Publication License, v1.0 or later (the latest version is presently available at http://www.opencontent.org/openpub/). The authors of this book have elected not to choose any options under the OPL. This online book was obtained from http://www.fooassociates.com/phpfer/ and is designed to provide information about the PHP programming language, focusing on PHP version 4.0.4 for the most part. The information is provided on an as-is basis, and no warranty or fitness is implied. All persons and entities shall have neither liability nor responsibility to any person or entity with respect to any loss or damage arising from the information contained in this book.