MongoClient::listDBs
(PECL mongo >=1.3.0)
MongoClient::listDBs — Lists all of the databases available.
Описание
public array MongoClient::listDBs
( void
)
Список параметров
У этой функции нет параметров.
Возвращаемые значения
Returns an associative array containing three fields. The first field is databases, which in turn contains an array. Each element of the array is an associative array corresponding to a database, giving th database's name, size, and if it's empty. The other two fields are totalSize (in bytes) and ok, which is 1 if this method ran successfully.
Примеры
Пример #1 MongoClient::listDBs() example
Example demonstrating how to use listDBs and the returned data structure.
<?php
$mongo = new MongoClient();
$dbs = $mongo->listDBs();
print_r($dbs);
?>
Результатом выполнения данного примера будет что-то подобное:
Array
(
[databases] => Array
(
[0] => Array
(
[name] => doctrine
[sizeOnDisk] => 218103808
[empty] =>
)
)
[totalSize] => 218103808
[ok] => 1
)
- PHP Руководство
- Функции по категориям
- Индекс функций
- Справочник функций
- Расширения для работы с базами данных
- Расширения для работы с базами данных отдельных производителей
- MongoDB
- Базовые классы
- Функция MongoClient::close() - Closes this connection
- Функция MongoClient::connect() - Connects to a database server
- Функция MongoClient::__construct() - Creates a new database connection object
- Функция MongoClient::dropDB() - Drops a database [deprecated]
- Функция MongoClient::__get() - Gets a database
- Функция MongoClient::getConnections() - Return info about all open connections
- Функция MongoClient::getHosts() - Updates status for all associated hosts
- Функция MongoClient::getReadPreference() - Get the read preference for this connection
- Функция MongoClient::getWriteConcern() - Get the write concern for this connection
- Функция MongoClient::killCursor() - Kills a specific cursor on the server
- Функция MongoClient::listDBs() - Lists all of the databases available.
- Функция MongoClient::selectCollection() - Gets a database collection
- Функция MongoClient::selectDB() - Gets a database
- Функция MongoClient::setReadPreference() - Set the read preference for this connection
- Функция MongoClient::setWriteConcern() - Set the write concern for this connection
- Функция MongoClient::__toString() - String representation of this connection
Коментарии
A "no frills" listing of all the databases present can be obtained by means of the simple following steps:
<?php
$conn = new MongoClient("mongodb://localhost");
$dbases = $conn->listDBs();
$num = 0;
foreach ($dbases['databases'] as $dbs) {
$num++;
$dbname = $dbs['name'];
echo "<br> $num. $dbname";
}
?>
On the assumption that you have three databases present, the foregoing will produce an output that will look similar to this:
1. local
2. members
3. test