MongoCollection::__construct
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MongoCollection
PHP Manual

# MongoCollection::count

(PECL mongo >=0.9.0)

MongoCollection::count — Counts the number of documents in this collection

### Descripción

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

### Lista de parámetros

`query`

  Only count documents matching this query.

`fields`

  Only count documents with these fields.

### Valores retornados

Returns the number of documents.

### Ejemplos

Example #1 MongoCollection::count() example

`<?php
$collection->insert(array('x'=>1));
$collection->insert(array('x'=>2));
$collection->insert(array('x'=>3, 'y'=>1));
var_dump($collection->count());
var_dump($collection->count(array('x'=>1)));
var_dump($collection->count(array(), array('z'=>1)));
?>`

El resultado del ejemplo seria algo similar a:

    float(3)
    float(1)
    float(0)

MongoCollection::__construct
MongoCollection::createDBRef
MongoCollection
PHP Manual