MONGOMAXKEY(3) 1 MONGOMAXKEY(3)
The MongoMaxKey class
INTRODUCTION
MongoMaxKey is an special type used by the database that compares greater than all other possible BSON values. Thus, if a query is sorted
by a given field in ascending order, any document with a MongoMaxKey as its value will be returned last.
MongoMaxKey has no associated fields, methods, or constants. It is merely the "greatest" value that can be represented in the database.
Note
MongoMaxKey is used internally by MongoDB for indexing and sharding. There is generally no reason to use this class in an applica-
tion.
CLASS SYNOPSIS
MongoMaxKey
MongoMaxKey
USING MongoMaxKey"; AS A VALUE"
<?php
$collection->insert(array("task" => "dishes", "doBy" => new MongoMaxKey));
$collection->insert(array("task" => "staff meeting", "doBy" => new MongoDate(strtotime("+4 days"))));
$cursor = $collection->find()->sort(array("doBy" => 1));
?>
The cursor will return the staff meeting document followed by the dishes document. The dishes document will always be returned last,
regardless of what else is added to the collection (unless other documents are added with MongoMaxKey in their "doBy" field). See Also
oMongoMinKey
PHP Documentation Group MONGOMAXKEY(3)
