MongoCollection::findAndModify
MongoCollection::__get
MongoCollection
PHP Manual

# MongoCollection::findOne

(PECL mongo >=0.9.0)

MongoCollection::findOne — Querys this collection, returning a single element

### Beschreibung

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

As opposed to MongoCollection::find(), this method will return only the first result from the result set, and not a MongoCursor that can be iterated over.

### Parameter-Liste

`query`

  The fields for which to search. MongoDB's query language is quite extensive. The PHP driver will in almost all cases pass the query straight through to the server, so reading the MongoDB core docs on » find is a good idea.

  Warnung

  Please make sure that for all special query operaters (starting with $) you use single quotes so that PHP doesn't try to replace "$exists" with the value of the variable $exists.

`fields`

  Fields of the results to return. The array is in the format array('fieldname' => true, 'fieldname2' => true). The _id field is always returned.

### Rückgabewerte

Returns record matching the search or `NULL`.

### Fehler/Exceptions

Throws MongoConnectionException if it cannot reach the database.

### Beispiele

Beispiel #1 MongoCollection::findOne() document by its id.

This example demonstrates how to find a single document in a collection by its id.

`<?php
$articles = $mongo->my_db->articles;
$article = $articles->findOne(array('_id' => new MongoId('47cc67093475061e3d9536d2')));
?>`

Beispiel #2 MongoCollection::findOne() document by some condition.

This example demonstrates how to find a single document in a collection by some condition and limiting the returned fields.

`<?php
$users = $mongo->my_db->users;
$user = $users->findOne(array('username' => 'jwage'), array('password'));
print_r($user);
?>`

Das oben gezeigte Beispiel erzeugt eine ähnliche Ausgabe wie:

    Array
    (
        [_id] => MongoId Object
            (
            )

        [password] => test
    )

Notice how even though the document does have a username field, we limited the results to only contain the password field.

### Siehe auch

- MongoCollection::find() - Querys this collection, returning a MongoCursor for the result set
- MongoCollection::insert() - Inserts a document into the collection
- MongoDB core docs on » find.

MongoCollection::findAndModify
MongoCollection::__get
MongoCollection
PHP Manual