PHP 5.4.36 Released

The MongoClient class

(PECL mongo >=1.3.0)


A connection manager for PHP and MongoDB.

This class is used to create and manage connections. A typical use is:

Example #1 MongoClient basic usage


= new MongoClient(); // connect
$db $m->foo// get the database named "foo"


See MongoClient::__construct() and the section on connecting for more information about creating connections.

Sommario dellla classe

MongoClient {
/* Costanti */
const string VERSION ;
const string DEFAULT_HOST = "localhost" ;
const int DEFAULT_PORT = 27017 ;
const string RP_PRIMARY = "primary" ;
const string RP_PRIMARY_PREFERRED = "primaryPreferred" ;
const string RP_SECONDARY = "secondary" ;
const string RP_SECONDARY_PREFERRED = "secondaryPreferred" ;
const string RP_NEAREST = "nearest" ;
/* Proprietà */
public boolean $connected = FALSE ;
public string $status = NULL ;
protected string $server = NULL ;
protected boolean $persistent = NULL ;
/* Metodi */
public __construct ([ string $server = "mongodb://localhost:27017" [, array $options = array("connect" => TRUE) [, array $driver_options ]]] )
public bool close ([ boolean|string $connection ] )
public bool connect ( void )
public array dropDB ( mixed $db )
public MongoDB __get ( string $dbname )
public static array getConnections ( void )
public array getHosts ( void )
public array getReadPreference ( void )
public array getWriteConcern ( void )
public bool killCursor ( string $server_hash , int|MongoInt64 $id )
public array listDBs ( void )
public MongoCollection selectCollection ( string $db , string $collection )
public MongoDB selectDB ( string $name )
public bool setReadPreference ( string $read_preference [, array $tags ] )
public bool setWriteConcern ( mixed $w [, int $wtimeout ] )
public string __toString ( void )

Costanti predefinite

MongoClient Constants

PHP driver version. May be suffixed with "dev", "+" or "-" if it is in-between versions.
Host to connect to if no host is given.
Port to connect to if no port is given.
Read preference for the primary replica set member.
Read preference for preferring the primary replica set member.
Read preference for a secondary replica set member.
Read preference for preferring a secondary replica set member.
Read preference for the nearest replica set member.



This property will be set to TRUE if we have a open connection to the database, FALSE otherwise. If the connection is to a replica set, this property will only be TRUE if the driver has a connection to a node matching the current read preference. This property does not take authentication into account.

This property is deprecated since version 1.5.0.


This property is no longer used and will be set to NULL In driver versions 1.1.x and earlier, this may be set to a string value (e.g. "recycled", "new") when persistent connections are used.

This property is deprecated since version 1.5.0.

Vedere anche:

Indice dei contenuti

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User Contributed Notes 4 notes

mike at eastghost dot com
1 year ago
php monogo driver 1.3.4
feb 2013

After demoting old replicaset primary to secondary, and promoting old replicaset second into primary, we began seeing "No candidate servers found" MongoException at initial attempt to connect to (new) replicaset primary (via this hint in the /etc/mongo.conf: replSet = rs1/

Fix seems to be

1. NEVER list "localhost" in the bind= line of /etc/mongo.conf

2. ALWAYS list every replica set member in every member's /etc/hosts file -- there seems to be something wrong with DNS lookup timing.
mike at eastghost dot com
1 year ago
This will help maintain sanity while debugging replicaSet connectivity problems:

error_reporting( E_ALL )
// print every log message possible
\MongoLog::setLevel(\MongoLog::ALL); // all log levels
\MongoLog::setModule(\MongoLog::ALL); // all parts of the driver
bennettsst at NOSPAM dot gmail dot com
7 months ago
Using the 1.2.5-5.5 vc11 driver the connected attribute is depracted.
jazz at funkynerd dot com
2 years ago
Seeing as the Mongo class has been deprecated, I'm using the following code to allow compatibility with the pre 1.3.0 driver successfully.

= 'MongoClient';

$class = 'Mongo';
$conn = new $class($hosts, $args);
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