MongoDB
PHP-Handbuch

MongoDB::getCollectionInfo

Returns information about collections in this database

Beschreibung

public array MongoDB::getCollectionInfo ([ array $options = array() ] )

Gets a list of all collections in the database and returns them as an array of documents, which contain their names and options.

Hinweis: This method will use the » listCollections database command when communicating with MongoDB 2.8+. For previous database versions, the method will query the special system.namespaces collection.

Parameter-Liste

options

An array of options for listing the collections. Currently available options include:

  • "filter"

    Optional query criteria. If provided, this criteria will be used to filter the collections included in the result.

    Relevant fields that may be queried include "name" (collection name as a string, without the database name prefix) and "options" (object containing options used to create the collection)..

    Hinweis: MongoDB 2.6 and earlier versions require the "name" criteria, if specified, to be a string value (i.e. equality match). This is because the driver must prefix the value with the database name in order to query the system.namespaces collection. Later versions of MongoDB do not have this limitation, as the driver will use the listCollections command.

  • "includeSystemCollections"

    Boolean, defaults to FALSE. Determines whether system collections should be included in the result.

The following option may be used with MongoDB 2.8+:

  • "maxTimeMS"

    Specifies a cumulative time limit in milliseconds for processing the operation (does not include idle time). If the operation is not completed within the timeout period, a MongoExecutionTimeoutException will be thrown.

Rückgabewerte

This function returns an array where each element is an array describing a collection. Elements will contain a name key denoting the name of the collection, and optionally contain an options key denoting an array of objects used to create the collection. For example, capped collections will include capped and size options.

Fehler/Exceptions

For MongoDB 2.6 and earlier, MongoException will be thrown if a non-string value was specified for the "filter" option's "name" criteria.

Beispiele

Beispiel #1 MongoDB::getCollectionInfo example

<?php
$m = new MongoClient();
$db = $m->selectDB("demo");
var_dump($db->getCollectionInfo());
?>

Das oben gezeigte Beispiel erzeugt eine ähnliche Ausgabe wie:

array(2) {
  [0]=>
  array(2) {
    ["name"]=>
    string(4) "logs"
    ["options"]=>
    array(2) {
      ["capped"]=>
      bool(true)
      ["size"]=>
      int(10240)
    }
  }
  [1]=>
  array(2) {
    ["name"]=>
    string(5) "users"
    ["options"]=>
    array(1) {
      ["flags"]=>
      int(1)
    }
  }
}

Siehe auch

  • MongoDB::getCollectionNames
  • MongoDB::listCollections