Create a new command cursor from an existing cursor document

MongoCommandCursor::__construct
MongoCommandCursor::current
MongoCommandCursor
PHP Manual

# MongoCommandCursor::createFromDocument

(PECL mongo >=1.5.0)

MongoCommandCursor::createFromDocument — Create a new command cursor from an existing cursor document

### Description

public MongoCommandCursor::createFromDocument ( MongoClient `$connection` , string `$hash` , array `$document` )

Use this method if you have a raw command result with cursor information in it.

### Parameters

`connection`

  Database connection.

`hash`

  The connection has, as obtained through the third by-reference argument to MongoDB:command().

`document`

  Document with cursor information in it. This document needs to contain the id, ns and firstBatch fields. Such a document is obtained by calling the MongoDB:command() with appropriate arguments to return a cursor, and not just a result. See the example below.

### Return Values

Returns the new cursor.

### Examples

Example #1 MongoCommandCursor::createFromDocument()

`<?php
$m = new MongoClient;
$d = $m->demo;
// setup the pipeline
$pipeline = [
[ '$group' => [
'_id' => '$country_code',
'timezones' => [ '$addToSet' => '$timezone' ]
] ],
[ '$sort' => [ '_id' => 1 ] ],
];
// run the command. The "cursor" option below instructs the server to return a cursor information document instead of results
$r = $d->command(
[
'aggregate' => 'cities',
'pipeline' => $pipeline,
'cursor' => [ 'batchSize' => 1 ],
],
null,
$hash
);
// Show result and hash
var_dump( $r, $hash );
// construct the command cursor
$cursor = MongoCommandCursor::createFromDocument( $m, $hash, $r );
?>`

The above example will output something similar to:

array(2) {
["cursor"]=>
array(3) {
["id"]=>
object(MongoInt64)#5 (1) {
["value"]=>
string(12) "392143983421"
}
["ns"]=>
string(11) "demo.cities"
["firstBatch"]=>
array(1) {
[0]=>
array(2) {
["_id"]=>
string(2) "AD"
["timezones"]=>
array(1) {
[0]=>
string(14) "Europe/Andorra"
}
}
}
}
["ok"]=>
float(1)
}
string(25) "localhost:27017;-;.;17617"

As you can see, the returned cursor information has the id, ns and firstBatch fields.

MongoCommandCursor::__construct
MongoCommandCursor::current
MongoCommandCursor
PHP Manual