Counts the number of documents in this collection

Descrizione

public int MongoCollection::count ([ array $query = array() [, array $options = array() ]] )

Elenco dei parametri

query

Associative array or object with fields to match.

options

An array of options for the index creation. Currently available options include:

Nome	Tipo	Descrizione
`hint`	mixed	Index to use for the query. If a string is passed, it should correspond to an index name. If an array or object is passed, it should correspond to the specification used to create the index (i.e. the first argument to MongoCollection::createIndex()). This option is only supported in MongoDB 2.6+.
`limit`	integer	The maximum number of matching documents to return.
`maxTimeMS`	integer	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. This option is only supported in MongoDB 2.6+.
`skip`	integer	The number of matching documents to skip before returning results.

Valori restituiti

Returns the number of documents matching the query.

Errori/Eccezioni

Throws MongoResultException if the server could not execute the command due to an error.

Throws MongoExecutionTimeoutException if command execution was terminated due to maxTimeMS.

Log delle modifiche

Versione	Descrizione
1.6.0	The second parameter is now an `options` array. Passing `limit` and `skip` as the second and third parameters, respectively, is deprecated.
1.0.7	Added `limit` and `skip` as second and third parameters, respectively.

Esempi

Example #1 MongoCollection::count() example


<?php

$collection->insert(array('x'=>1));
$collection->insert(array('x'=>2));
$collection->insert(array('x'=>3));

var_dump($collection->count());
var_dump($collection->count(array('x'=>1)));

?>

Il precedente esempio visualizzerà qualcosa simile a:

int(3)
int(1)