PHP Doku:: Creates a collection - mongodb.createcollection.html

Verlauf / Chronik / History: (1) anzeigen

Sie sind hier:
Doku-StartseitePHP-HandbuchFunktionsreferenzDatenbankerweiterungenAnbieterspezifische DatenbankerweiterungenMongoDB Native DriverCore ClassesThe MongoDB classMongoDB::createCollection

Ein Service von Reinhard Neidl - Webprogrammierung.

The MongoDB class

<<MongoDB::__construct

MongoDB::createDBRef>>

MongoDB::createCollection

(PECL mongo >=0.9.0)

MongoDB::createCollectionCreates a collection

Beschreibung

public MongoCollection MongoDB::createCollection ( string $name [, bool $capped = FALSE [, int $size = 0 [, int $max = 0 ]]] )

This method is used to create capped collections and other collections requiring special options. It is identical to running:

<?php

$collection 
$db->command(array("create" => $name"size" => $size"capped" => $capped"max" => $max));

?>
See MongoDB::command() for more information about database commands.

Parameter-Liste

name

The name of the collection.

capped

If the collection should be a fixed size.

size

If the collection is fixed size, its size in bytes.

max

If the collection is fixed size, the maximum number of elements to store in the collection.

Rückgabewerte

Returns a collection object representing the new collection.

Beispiele

Beispiel #1 MongoDB::createCollection() capped collection example

A capped collection is a special type of collection that has either a fixed or a fixed number of elements. Once the collection is "full," the oldest elements will be removed when new elements are added. Capped collections can be very useful for applications like logging, where you may want to reserve a certain amount of space for logs and not worry about them getting too big.

This example creates a very tiny log collection that will keep a maximum of 10 documents.

<?php

$log 
$db->createCollection("logger"true10*102410); 

for (
$i 0$i 100$i++) {
    
$log->insert(array("level" => WARN"msg" => "sample log message #$i""ts" => new MongoDate()));
}

$msgs $log->find();

foreach (
$msgs as $msg) {
    echo 
$msg['msg']."\n";
}

?>

Das oben gezeigte Beispiel erzeugt eine ähnliche Ausgabe wie:


sample log message #90
sample log message #91
sample log message #92
sample log message #93
sample log message #94
sample log message #95
sample log message #96
sample log message #97
sample log message #98
sample log message #99

Keine BenutzerBeiträge.
- Beiträge aktualisieren...



PHP Powered Diese Seite bei php.net
The PHP manual text and comments are covered by the Creative Commons Attribution 3.0 License © the PHP Documentation Group - Impressum - mail("TO:Reinhard Neidl",...)