XIX. DBM Functions [deprecated]

Introducere

These functions allow you to store records stored in a dbm-style database. This type of database (supported by the Berkeley DB, GDBM, and some system libraries, as well as a built-in flatfile library) stores key/value pairs (as opposed to the full-blown records supported by relational databases).

Notã: However, dbm support is deprecated and you are encouraged to use the Database (dbm-style) abstraction layer functions instead.

Notã: This extension has been removed as of PHP 5 and moved to the PECL repository.

Necesităţi

To use this functions you have to compile PHP with support for an underlying database. See the list of supported Databases.

Instalare

In order to use these functions, you must compile PHP with dbm support by using the --with-db option. In addition you must ensure support for an underlying database or you can use some system libraries.

Configurare la rulare

Această extensie nu defineşte directive de configurare.

Tipuri de resurse

The function dbmopen() returns an database identifier which is used by the other dbm-functions.

Constante predefinite

Această extensie nu defineşte constante.

Exemple

Exemplu 1. DBM example


<?php

$dbm = dbmopen("lastseen", "w");
if (dbmexists($dbm, $userid)) {
    $last_seen = dbmfetch($dbm, $userid);
} else {
    dbminsert($dbm, $userid, time());
}
do_stuff();
dbmreplace($dbm, $userid, time());
dbmclose($dbm);

?>