Введение
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).
Замечание:
DBM support is deprecated and you are encouraged to use the
Database (dbm-style) abstraction layer functions
instead.
Замечание:
This extension has been removed from PHP and is no longer available as
of PHP 5.0.0.
Требования
To use this functions you have to compile PHP with support for an
underlying database. See the
list of supported Databases.
Установка
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.
Настройка во время выполнения
Данное расширение не определяет никакие директивы конфигурации в php.ini.
Типы ресурсов
The function dbmopen() returns an database identifier
which is used by the other dbm-functions.
Предопределенные константы
Данное расширение не определяет никакие константы.
Примеры
Пример 438. 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);
?>
Содержание
- dblist — Describes the DBM-compatible library being used
- dbmclose — Closes a dbm database
- dbmdelete — Deletes the value for a key from a DBM database
- dbmexists — Tells if a value exists for a key in a DBM database
- dbmfetch — Fetches a value for a key from a DBM database
- dbmfirstkey — Retrieves the first key from a DBM database
- dbminsert — Inserts a value for a key in a DBM database
- dbmnextkey
- dbmopen — Opens a DBM database
- dbmreplace — Replaces the value for a key in a DBM database
