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dba_replace — Replaces the value of an existing key-value pair (or inserts a new key-value pair) in the database.


bool dba_replace(key, value, dba_resource);
string key: Key to insert
string value: Value to associate with the key
resource dba_resource: Resource handle opened by dba_open() or dba_popen()


TRUE on success; FALSE on failure


dba_replace() replaces or inserts a key-value pair in a db file. If the key-value pair exists, the value is overwritten with the value contained in the value argument. If the key doesn't exist, the function behaves like dba_insert() , adding a new key-value pair to the database.

If a pair is successfully replaced or inserted, the function returnsTRUE. In all other cases, the function fails and returnsFALSE.


PHP Version: 3.0.8+, 4.0b2+

See also

To insert a key-value pair



Example 220. Replace or insert a key-value pair

$key = 'Freud';

dba_insert ($key, 'Sigmund', $dba_handle)
    or die ("The key-value pair could not be created or replaced.
        It is likely that something bad has happened.");

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 The authors of this book have elected not to choose any options under the OPL. This online book was obtained from 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.

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