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(PECL mongo >=0.9.0)

MongoCollection::saveSaves a document to this collection


public mixed MongoCollection::save ( array|object $a [, array $options = array() ] )

If the object is from the database, update the existing database object, otherwise insert this object.



Array or object to save. If an object is used, it may not have protected or private properties.


If the parameter does not have an _id key or property, a new MongoId instance will be created and assigned to it. See MongoCollection::insert() for additional information on this behavior.


Options for the save.

  • "fsync"

    Boolean, defaults to FALSE. If journalling is enabled, it works exactly like "j". If journalling is not enabled, it forces the insert to be synced to disk before returning success. If TRUE, an acknowledged insert is implied and will override setting w to 0.


    This option is deprecated. Please use the "j" option instead.

  • "j"

    Boolean, defaults to FALSE. Forces the insert to be synced to the journal before returning success. If TRUE, an acknowledged insert is implied and will override setting w to 0.

  • "w"

    See WriteConcerns. The default value for MongoClient is 1.

  • "wtimeout"

    How long to wait for WriteConcern acknowledgement. The default value for MongoClient is 10000 milliseconds.

  • "safe"

    Deprecated. Please use the WriteConcern w option.

  • "timeout"

    Integer, defaults to MongoCursor::$timeout. If acknowledged writes are used, this sets how long (in milliseconds) for the client to wait for a database response. If the database does not respond within the timeout period, a MongoCursorTimeoutException will be thrown.

Return Values

If w was set, returns an array containing the status of the save. Otherwise, returns a boolean representing if the array was not empty (an empty array will not be inserted).


Throws MongoException if the inserted document is empty or if it contains zero-length keys. Attempting to insert an object with protected and private properties will cause a zero-length key error.

Throws MongoCursorException if the "w" option is set and the write fails.

Throws MongoCursorTimeoutException if the "w" option is set to a value greater than one and the operation takes longer than MongoCursor::$timeout milliseconds to complete. This does not kill the operation on the server, it is a client-side timeout. The operation in MongoCollection::$wtimeout is milliseconds.


Version Description
1.2.0 Added "timeout" option.
1.0.11 Disconnects on "not master" errors if "safe" is set.

Added ability to pass integers to the "safe" option, which previously only accepted booleans.

Added "fsync" option.

1.0.5 Added options parameter.


Example #1 MongoCollection::save() example


= array('x' => 1);

// insert $obj into the db

// add another field
$obj['foo'] = 'bar';

// $obj cannot be inserted again, causes duplicate _id error

// save updates $obj with the new field


The above example will output something similar to:

array(2) {
  object(MongoId)#4 (1) {
    string(24) "50b6afe544415ed606000000"

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