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Introduction

Instances of this class are used to interact with a database. To get a database:


<?php

$m = new Mongo(); // connect
$db = $m->selectDB("example");

?>

Database names can use almost any character in the ASCII range. However, they cannot contain " ", "." or be the empty string. The name "system" is also reserved.

A few unusual, but valid, database names: "null", "[x,y]", "3", "\"", "/".

Unlike collection names, database names may contain "$".

Class synopsis

MongoDB {

/* Constants */

const int PROFILING_OFF = 0 ;

const int PROFILING_SLOW = 1 ;

const int PROFILING_ON = 2 ;

/* Fields */

public integer $MongoDB->w = 1 ;

public integer $wtimeout = 10000 ;

/* Methods */

public array MongoDB::authenticate ( string $username , string $password )

public array MongoDB::command ( array $command )

MongoDB::__construct ( Mongo $conn , string $name )

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

public array MongoDB::createDBRef ( string $collection , mixed $a )

public array MongoDB::drop ( void )

public array MongoDB::dropCollection ( mixed $coll )

public array MongoDB::execute ( mixed $code [, array $args = array() ] )

public bool MongoDB::forceError ( void )

public MongoCollection MongoDB::__get ( string $name )

public array MongoDB::getDBRef ( array $ref )

public MongoGridFS MongoDB::getGridFS ([ string $prefix = "fs" ] )

public int MongoDB::getProfilingLevel ( void )

public bool MongoDB::getSlaveOkay ( void )

public array MongoDB::lastError ( void )

public array MongoDB::listCollections ( void )

public array MongoDB::prevError ( void )

public array MongoDB::repair ([ bool $preserve_cloned_files = FALSE [, bool $backup_original_files = FALSE ]] )

public array MongoDB::resetError ( void )

public MongoCollection MongoDB::selectCollection ( string $name )

public int MongoDB::setProfilingLevel ( int $level )

public bool MongoDB::setSlaveOkay ([ bool $ok = true ] )

public string MongoDB::__toString ( void )

}

Predefined Constants

MongoDB Log Levels

MongoDB::PROFILING_OFF
0: Profiling is off.
MongoDB::PROFILING_SLOW
1: Profiling is on for slow operations (>100 ms).
MongoDB::PROFILING_ON
2: Profiling is on for all operations.

Fields

w 1

The number of servers to replicate a change to before returning success. Inherited by instances of MongoCollection derived from this. w functionality is only available in version 1.5.1+ of the MongoDB server and 1.0.8+ of the driver.

w is used whenever you perform a "safe" operation (MongoCollection::insert(), MongoCollection::update(), MongoCollection::remove(), MongoCollection::save(), and MongoCollection::ensureIndex() all support safe options). With the default value (1), a safe operation will return once the database server has the operation. If the server goes down before the operation has been replicated to a slave, it is possible to lose the operation forever. Thus, you can specify w to be higher than one and guarantee that at least one slave has the operation before it is considered successful.

For example, if w is 2, the main server and one slave must have a record of the operation or the driver will throw a MongoCursorException. It is tempting to set w to the total number of slaves + master, but then if one slave is down the op will fail and an exception will be thrown, so usually w=2 is safest (master+1 slave).

wtimeout 10000

The number of milliseconds to wait for MongoDB::$w replications to take place. Inherited by instances of MongoCollection derived from this. w functionality is only available in version 1.5.1+ of the MongoDB server and 1.0.8+ of the driver.

Unless wtimeout is set, the server waits forever for replicating to w servers to finish. The driver defaults to waiting for 10 seconds, you can change this value to alter its behavior.

The MongoDB class

Introduction

Class synopsis

Predefined Constants

MongoDB Log Levels

Fields

See Also

Table of Contents

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